RESEARCH ENGINEERS INC
8-K, 1999-03-05
PREPACKAGED SOFTWARE
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<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT
                      PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



     DATE OF REPORT (Date of earliest event reported): February 26, 1999



                            RESEARCH ENGINEERS, INC.
             (Exact name of registrant as specified in its charter)



        Delaware                 0-28560                22-2356861
    (State or Other      (Commission File Number)      (IRS Employer
    Jurisdiction of                                 Identification No.)
     Incorporation)



                            22700 SAVI RANCH PARKWAY
                          YORBA LINDA, CALIFORNIA 92887
                   (Address of Principal Executive Offices)


                                (714) 974-2500
             (Registrant's telephone number, including area code)


                                 Not Applicable
        (Former Name or Former Address, if Changed Since Last Report.)


<PAGE>


ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS

         On February 26, 1999, Research Engineers, Inc. ("the Company")
         acquired all of the outstanding stock of R-Cube Technologies, Inc.
         ("R-Cube").  The stock was acquired from Krishna P. Reddy and
         Anuradha Padala, Prakash Rao Pokala and Sucharita Pokala, and
         Srinivasa Reddy Malireddy and M. Veda Vathi.

         R-Cube  is  a  provider  of  Information   Technology  ("IT")  Services
         headquartered in Cupertino, California.

         The  acquisition  is expected to be  accounted  for using the  purchase
         method  of  accounting.   The  aggregate   purchase  price,   including
         acquisition costs, was approximately $2.6 million.  The acquisition was
         funded  through a $2.32 million line of credit from Imperial  Bank, and
         operating  capital.  In determining the purchase price for R-Cube,  the
         Company took into  account the value of  companies of similar  industry
         and size to  R-Cube,  comparable  transactions  and the market for such
         companies generally.


ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

      (a)   Financial statements of businesses acquired

            It is impracticable to provide the required financial statements for
            the  acquired  business  at the time  this  Form 8-K is  filed.  The
            registrant shall file the required financial  statements under cover
            of Form 8-K/A on or before May 12, 1999.

      (b)   Pro forma financial information.

            To be provided on or before May 12, 1999.

      (c)   Exhibits

            2.1  Stock Purchase Agreement dated as of January 18, 1999 among
                 the Company, R-Cube Technologies, Inc. and Krishna P. Reddy

            2.2  Stock Purchase Agreement dated as of January 18, 1999 among
                 the Company, R-Cube Technologies, Inc. and Prakash Rao Pokala

            2.3  Stock Purchase Agreement dated as of January 18, 1999 among
                 the Company, R-Cube Technologies, Inc. and Srinivasa Reddy
                 Malireddy

            2.4  Credit Agreement dated February 26, 1999 by and between the
                 Company and Imperial Bank

            2.5  General Security Agreement dated February 26, 1999 by and 
                 between the Company and Imperial Bank

            2.6  General Security Agreement dated February 26, 1999 by and 
                 between the Company and Imperial Bank

            2.7  Note  Secured  by  Deed  of  Trust  in the  principal  amount 
                 of $2,320,000  dated  February 26, 1999 made by the Company in 
                 favor of Imperial Bank




<PAGE>


                                   SIGNATURES
                                   ----------

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


Date:  March 5, 1999

                                          RESEARCH ENGINEERS, INC.


                                          By: /S/ WAYNE BLAIR
                                          -------------------
                                             Wayne Blair
                                             Chief Financial Officer,
                                             Secretary
                                             and Treasurer


<PAGE>


                                  EXHIBIT INDEX
                                  -------------

Exhibit 2.1 Stock Purchase Agreement dated as of January 18, 1999 among
            the Company, R-Cube Technologies, Inc. and Krishna P. Reddy

Exhibit 2.2 Stock Purchase Agreement dated as of January 18, 1999 among
            the Company, R-Cube Technologies, Inc. and Prakash Rao Pokala

Exhibit 2.3 Stock Purchase Agreement dated as of January 18, 1999 among
            the Company, R-Cube Technologies, Inc. and Srinivasa Reddy
            Malireddy

Exhibit 2.4 Credit Agreement dated February 26, 1999 by and between the
            Company and Imperial Bank

Exhibit 2.5 General  Security  Agreement  dated  February  26,  1999 by and
            between the Company and Imperial Bank

Exhibit 2.6 General  Security  Agreement  dated  February  26,  1999 by and
            between the Company and Imperial Bank

Exhibit 2.7 Note  Secured  by Deed of  Trust  in the  principal  amount  of
            $2,320,000  dated  February 26, 1999 made by the Company in favor of
            Imperial Bank




<PAGE>

                                                                     Exhibit 2.1








                            STOCK PURCHASE AGREEMENT

                                      AMONG

                            RESEARCH ENGINEERS, INC.

                            R-CUBE TECHNOLOGIES, INC.

                                       AND

                                KRISHNA P. REDDY


                                   DATED AS OF

                                JANUARY 18, 1999


<PAGE>
<TABLE>
<CAPTION>
                                       
                                TABLE OF CONTENTS

      DESCRIPTION                                                      PAGE NO.
      -----------                                                      --------
      <S>                                                                   <C>

      1.    PURCHASE AND SALE OF SHARES......................................1
            1.1   Purchase and Sale. ........................................1
            1.2   Purchase Price. ...........................................1
            1.3   Adjustment to Purchase Price. .............................1
            1.4   Payment of Purchase Price. ................................1
            1.5   Review of Final Balance Sheet. ............................2

      2.    REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.............2
            2.1   Organization; Good Standing; Qualification and Power. .....2
            2.2   Capital Structure..........................................3
                  2.2.1 Stock. ..............................................3
                  2.2.2 No Other Commitments. ...............................3
            2.3   Authority..................................................3
                  2.3.1 Corporate Action. ...................................3
                  2.3.2 Sellers' Authority. .................................3
                  2.3.3 No Conflict. ........................................3
                  2.3.4 Governmental Consents. ..............................4
            2.4   Financial Statements. .....................................4
            2.5   Compliance with Applicable Laws. ..........................4
            2.6   Insurance. ................................................4
            2.7   Litigation. ...............................................5
            2.8   Employee Benefits..........................................5
            2.9   Absence of Undisclosed Liabilities. .......................6
            2.10  Absence of Certain Changes or Events. .....................6
            2.11  No Defaults. ..............................................7
            2.12  Certain Agreements. .......................................7
            2.13  Taxes......................................................8
            2.14  Intellectual Property. ...................................10
            2.15  Fees and Expenses. .......................................10
            2.16  Environmental Matters.....................................10
            2.17  [Intentionally Omitted]. .................................10
            2.18  Disclosure. ..............................................10
            2.19  Restrictions on Business Activities. .....................10
            2.20  Accounts Receivable.......................................10
            2.21  Personal Property. .......................................11
            2.22  Real Property. ...........................................11
            2.23  Warranties. ..............................................11
            2.24  Contracts. ...............................................11
            2.25  No Goods or Products. ....................................11
</TABLE>
                                       i
<PAGE>
<TABLE>

      <S>                                                                   <C>
      3.    REPRESENTATIONS AND WARRANTIES OF REI...........................11
            3.1   Organization; Good Standing; Qualification and Power. ....11
            3.2   Capital Structure.........................................12
                  3.2.1 Stock, Options and Warrants. .......................12
                  3.2.2 No Other Commitments. ..............................12
            3.3   Authority.................................................12
                  3.3.1 Corporate Action. ..................................12
                  3.3.2 No Conflict. .......................................12
                  3.3.3 Governmental Consents. .............................13
            3.4   SEC Documents.............................................13
                  3.4.1 SEC Reports. .......................................13
                  3.4.2 Financial Statements. ..............................13
            3.5   Litigation. ..............................................13
            3.6   Fees and Expenses. .......................................14
            3.7   Disclosure. ..............................................14
            3.8   Financial Capacity........................................14

      4.    R-CUBE AND SELLERS' COVENANTS...................................14
            4.1   Notification of Changes. .................................14
            4.2   Maintenance of Business. .................................14
            4.3   Conduct of Business. .....................................14
            4.4   Regulatory Approvals. ....................................16
            4.5   Necessary Consents. ......................................16
            4.6   Access to Information. ...................................16
            4.7   Satisfaction of Conditions Precedent. ....................17
            4.8   Confidentiality. .........................................17
            4.9   Cooperation in Review of R-CUBE Financial Statements. ....17

      5.    REI COVENANTS...................................................17
            5.1   Regulatory Approvals. ....................................17
            5.2   Necessary Consents. ......................................17
            5.3   Satisfaction of Conditions Precedent. ....................17
            5.4   Confidentiality. .........................................18

      6.    EMPLOYEE MATTERS................................................18

      7.    INDEMNIFICATION OF THE PARTIES..................................18
            7.1   Indemnification by Sellers................................18
            7.2   Indemnification by REI....................................19
            7.3   Manner of Indemnification. ...............................19
</TABLE>
                                       ii

<PAGE>
<TABLE>

      <S>                                                                   <C>
      8.    CLOSING.........................................................19
            8.1   Closing Date. ............................................19
            8.2   Deliveries by R-CUBE and Sellers at the Closing. .........19
            8.3   Delivery by REI at the Closing. ..........................20

      9.    CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE
            AND SELLER......................................................20
            9.1   Accuracy of Representations and Warranties. ..............20
            9.2   Covenants. ...............................................20
            9.3   Compliance with Law. .....................................20

      10.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI......................20
            10.1  Accuracy of Representations and Warranties. ..............21
            10.2  Covenants. ...............................................21
            10.3  Completion of Due Diligence...............................21
            10.4  Absence of Material Adverse Change. ......................21
            10.5  Compliance with Law. .....................................21
            10.6  Documents. ...............................................21
            10.7  Corporate Opinion. .......................................22
            10.8  Other Agreements..........................................22

      11.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI,
            R-CUBE AND SELLER...............................................22
            11.1  Government Consents. .....................................22
            11.2  No Legal Action. .........................................22

      12.   TERMINATION OF AGREEMENT........................................22
            12.1  Termination. .............................................22
            12.2  Notice of Termination. ...................................23
            12.3  Effect of Termination. ...................................23

      13.   NON-COMPETITION.................................................23
            13.1  Definitions...............................................23
            13.2  Non-Solicitation of Employees. ...........................24
            13.3  Non-Solicitation of Customers. ...........................24
            13.4  Additional Agreements.....................................25
            13.5  Remedies; Enforceability..................................25

      14.   SURVIVAL OF REPRESENTATIONS, WARRANTIES
            AND COVENANTS...................................................26

      15.   MISCELLANEOUS...................................................26
            15.1  Governing Law. ...........................................26
            15.2  Assignment; Binding Upon Successors and Assigns. .........26
            15.3  Severability. ............................................26
            15.4  Counterparts. ............................................26
</TABLE>
                                      iii.
<PAGE>
<TABLE>

      <S>                                                                   <C>
            15.5  Other Remedies. ..........................................26
            15.6  Amendment and Waivers. ...................................26
            15.7  Expenses. ................................................27
            15.8  Attorneys' Fees. .........................................27
            15.9  Notices. .................................................27
            15.10 Construction of Agreement. ...............................28
            15.11 No Joint Venture. ........................................28
            15.12 Further Assurances. ......................................28
            15.13 Absence of Third Party Rights. ...........................28
            15.14 Entire Agreement. ........................................28
</TABLE>
                                      iv.
<PAGE>
 

                            STOCK PURCHASE AGREEMENT


      THIS STOCK  PURCHASE  AGREEMENT  ("Agreement")  is entered into as of this
18th  day  of  January,  1999,  among  Research  Engineers,   Inc.,  a  Delaware
corporation  ("REI"),  R-CUBE  Technologies,   Inc.,  a  California  corporation
("R-CUBE"), and Krishna P. Reddy, an individual ("Seller").

                                    RECITALS

      A. Srinivasa Reddy Malireddy,  an individual,  and Prakash Rao Pokala,  an
individual  (collectively,  the  "Other  Sellers,"  and  together  with  Seller,
"Sellers"), own, in the aggregate, all of the issued and outstanding shares (the
"Shares") of capital stock of R-CUBE.

      B. Seller owns 1,100,000 of the Outstanding Shares ("Seller's Shares").

      C. REI desires to purchase  from  Sellers,  and Sellers  desire to sell to
REI,  the  Outstanding  Shares  on the terms  and  conditions  set forth in this
Agreement and in similar Stock Purchase  Agreements (the "Other  Agreements") to
be negotiated  and entered into between REI and the Other Sellers as of the date
of this Agreement.

                                    AGREEMENT

      NOW, THEREFORE, the parties to this Agreement agree as follows:

      1.  PURCHASE AND SALE OF SHARES.

          1.1 Purchase and Sale.  Subject to the terms and  conditions set forth
     herein,  at the  Closing  (as  defined  in Section 8 below),  Seller  shall
     transfer,  convey, assign and deliver Seller's Shares to REI, and REI shall
     acquire, purchase and accept Seller's Shares from Seller.

          1.2  Purchase  Price.  Subject  to  the  adjustments  to  be  made  in
     accordance  with the  provisions  of Sections 1.3 through 1.5, the purchase
     price for Seller's Shares is $1,066,272 (the "Purchase Price").

          1.3 Adjustment to Purchase Price. The Purchase Price shall be adjusted
     upward by 45.96% of the amount,  if any, that the  shareholders'  equity of
     R-CUBE ("Final  Shareholders'  Equity") as shown on R-CUBE's  balance sheet
     ("Final  Balance  Sheet") to be prepared by R-CUBE's  accountants as at the
     Closing Date  (defined in Section 8.1) and  delivered to REI at the Closing
     exceeds $500,000.

          1.4 Payment of Purchase Price. The Purchase Price shall be paid by REI
     to Seller as follows:

              (1) At the Closing,REI shall pay to Seller the Purchase Price; and

                                       1

<PAGE>


              (2)  Subject to  Section  1.5,  within 30 days after the  Closing
          Date,  REI  shall  pay to  Seller  in cash the  amount  of any  upward
          adjustment to the Purchase Price made pursuant to Section 1.3.

          1.5 Review of Final Balance Sheet. REI and its  representatives  shall
     have 15 days to review  the Final  Balance  Sheet.  If REI  disagrees  with
     R-CUBE's calculation of the Final Shareholders' Equity, REI shall within 15
     days  after  the  Closing  Date give  written  notice  to  Sellers  of such
     disagreement  specifying in  reasonable  detail,  insofar as possible,  the
     nature and extent of the  disagreement.  If REI and  Sellers  are unable to
     resolve  any such  disagreement  within 15 days  after  REI  gives  Sellers
     notice, the disagreement  shall be referred for final  determination to any
     accounting firm of national  reputation as may be reasonably  acceptable to
     REI and  Sellers.  REI and  Sellers may submit to the  accounting  firm any
     facts that they deem relevant to the  determination,  and the determination
     of the accounting firm shall be conclusive, non-appealable and binding upon
     REI  and  Sellers  for  all  purposes.   Any  necessary  upward  adjustment
     determined  by the  accounting  firm shall be payable in cash by REI within
     three  days  after REI has been  notified  of such  determination.  REI and
     Sellers agree that the  procedures  established by Sections 1.2 through 1.5
     shall constitute the exclusive procedures for determining the consideration
     to be paid by REI to Sellers for the  Shares.  Costs  incurred  pursuant to
     this Section 1.5 shall be borne equally by REI and Sellers.

     2.   REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.

          Except as set forth in a schedule  dated the date of this  Agreement
and  delivered by R-CUBE and Seller to REI  concurrently  herewith  ("Disclosure
Schedule") specifically  identifying the Section of this Agreement requiring the
delivery of such  disclosure,  R-CUBE and Seller represent and warrant to REI as
set forth below. In this Agreement, any reference to any event, change or effect
being  "material"  with  respect  to any entity or group of  entities  means any
material  event,  change  or  effect  related  to the  condition  (financial  or
otherwise), properties, assets, liabilities,  businesses, operations, results of
operations or prospects of such entity or group of entities taken as a whole. In
this  Agreement,  the term "Material  Adverse  Effect" used in connection with a
party or any of that party's subsidiaries means any event, change or effect that
is materially  adverse to the condition  (financial or  otherwise),  properties,
assets, liabilities,  businesses, operations, results of operations or prospects
of that party and its subsidiaries,  taken as a whole; provided, however, that a
Material Adverse Effect shall not include: (a) any adverse effect resulting from
conditions  affecting the engineering software industry as a whole or the United
States economy as a whole; (b) a failure by R-CUBE to meet internal  earnings or
revenue projections; or (c) any disruption of customer or supplier relationships
arising primarily out of or resulting primarily from actions contemplated by the
parties  in  connection  with,  or  which  is  primarily   attributable  to  the
announcement of this Agreement and the transactions  contemplated hereby, to the
extent attributable thereto.

          2.1 Organization; Good Standing;  Qualification and Power. R-CUBE is a
     corporation duly organized, validly existing and in good standing under the
     laws of the jurisdiction of its incorporation,  has all requisite corporate
     power and authority to own,  lease and operate its  properties and to carry
     on its business as now being  conducted,  and is duly qualified and in good
     standing  to do business  in each  jurisdiction  in which the nature of its
     business or the ownership or leasing of its properties makes  qualification
     necessary,  other than in jurisdictions  where the failure to qualify would
     not have a  Material  Adverse  Effect.  R-CUBE  does not own,  directly  or
     indirectly,  

                                       2
<PAGE>
 
     shares of capital stock of any other  corporation or any equity interest in
     any other entity,  nor does R-CUBE  control,  directly or  indirectly,  any
     other corporation,  association or business  organization.  R-CUBE has made
     available to REI or its counsel complete and correct copies of the articles
     of incorporation  and bylaws of R-CUBE, in each case as amended to the date
     of this  Agreement,  and copies of all minutes of  meetings  and actions by
     written consent of shareholders, directors and board committees of R-CUBE.

          2.2 Capital Structure.

               2.2.1 Stock.  The authorized  capital stock of R-CUBE consists of
          10,000,000  shares of common  stock,  no par value per share  ("R-CUBE
          Common Stock"). As of the date of this Agreement,  3,300,000 shares of
          R-CUBE Common Stock are issued and outstanding. All outstanding shares
          of the  capital  stock of R-CUBE are  validly  issued,  fully paid and
          nonassessable,  are not subject to preemptive  rights and are owned by
          Sellers  free and clear of any  liens,  security  interests,  pledges,
          agreements, claims, charges or encumbrances.
      
               2.2.2 No  Other  Commitments.  There  are no  options,  warrants,
          calls,  rights,  commitments,  conversion  rights or agreements of any
          character  to which  R-CUBE  is a party or by  which  R-CUBE  is bound
          obligating  R-CUBE to issue,  deliver or sell,  or cause to be issued,
          delivered or sold, any shares of capital stock of R-CUBE or securities
          convertible  into or  exchangeable  for  shares  of  capital  stock of
          R-CUBE,  or  obligating  R-CUBE  to grant,  extend  or enter  into any
          option,  warrant,  call,  right,   commitment,   conversion  right  or
          agreement.   There  are  no  voting  trusts  or  other  agreements  or
          understandings  to which  R-CUBE or any Seller is a party with respect
          to the voting of the capital stock of R-CUBE.

          2.3 Authority.

               2.3.1 Corporate Action.  R-CUBE has all requisite corporate power
          and  authority  to  enter  into  this  Agreement  and to  perform  its
          obligations hereunder and to consummate the transactions  contemplated
          by this  Agreement.  The execution  and delivery of this  Agreement by
          R-CUBE and the consummation by R-CUBE of the transactions contemplated
          hereby have been duly authorized by all necessary  corporate action on
          the  part of  R-CUBE.  This  Agreement  has  been  duly  executed  and
          delivered  by  R-CUBE,  and this  Agreement  is the valid and  binding
          obligation of R-CUBE, enforceable in accordance with its terms, except
          that such enforceability may be subject to (i) bankruptcy, insolvency,
          reorganization   or  other  similar  laws  affecting  or  relating  to
          enforcement of creditors'  rights generally and (ii) general equitable
          principles.

               2.3.2  Sellers'  Authority.  Each of  Sellers  has full power and
          capacity to enter into this Agreement and the Other  Agreements.  This
          Agreement  and the  Other  Agreements  have  been  duly  executed  and
          delivered by Sellers and this  Agreement  and the Other  Agreement are
          the valid and binding obligation of Sellers, enforceable in accordance
          with their  terms,  except that  enforceability  may be subject to (i)
          bankruptcy, insolvency, reorganization or other similar laws affecting
          or relating to  enforcement  of creditors'  rights  generally and (ii)
          general equitable principles.

               2.3.3  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions contemplated hereby nor compliance with the

                                       3
 

<PAGE>

          provisions  hereof will conflict with, or result in any violations of,
          or cause a default (with or without  notice or lapse of time, or both)
          under, or give rise to a right of termination, amendment, cancellation
          or  acceleration  of any  obligation  contained in, or the loss of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of R-CUBE under, any term, condition or provision
          of (x) the  articles of  incorporation  or bylaws of R-CUBE or (y) any
          loan or credit agreement,  note, bond, mortgage,  indenture,  lease or
          other material  agreement,  judgment,  order,  decree,  statute,  law,
          ordinance,  rule or regulation  applicable to R-CUBE or its properties
          or  assets,  other  than any  such  conflicts,  violations,  defaults,
          losses,  liens,  security  interests,  charges, or encumbrances which,
          individually  or in the aggregate,  would not have a Material  Adverse
          Effect.

               2.3.4  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          court,  administrative  agency  or  commission  or other  governmental
          authority   or   instrumentality,   domestic   or   foreign   (each  a
          "Governmental  Entity"),  is  required  to be  obtained  by  R-CUBE in
          connection  with the execution  and delivery of this  Agreement or the
          consummation of the transactions contemplated hereby.

          2.4 Financial  Statements.  R-CUBE has furnished to REI copies of: (a)
     the unaudited balance sheets of R-CUBE at December 31, 1996, 1997 and 1998,
     and the related  statements of income for the periods then ended.  Prior to
     the Closing, R-CUBE shall furnish to REI copies of R-CUBE's audited balance
     sheet at  December  31, 1998 and the  related  statement  of income for the
     period then ended. All financial statements referred to in this Section 2.4
     ("R-CUBE Financial  Statements") are or will be complete and correct,  have
     been prepared in accordance with generally accepted  accounting  principles
     applied on a consistent  basis during the  respective  periods,  and fairly
     present or will fairly present the financial  condition of R-CUBE as at the
     respective  dates  thereof and the results of  operation  of R-CUBE for the
     respective  periods  covered  by the  statements  of  income  contained  in
     therein.  R-CUBE does not have any  material  obligations  or  liabilities,
     contingent  or  otherwise,  not fully  disclosed  by the  R-CUBE  Financial
     Statements.

          2.5  Compliance  with  Applicable  Laws. The business of R-CUBE is not
     being  conducted in violation of any law,  ordinance,  regulation,  rule or
     order of any Governmental  Entity where the violation would have a Material
     Adverse  Effect.  R-CUBE has not been notified by any  Governmental  Entity
     that any  investigation  or review  with  respect  to R-CUBE is  pending or
     threatened,  nor  has  any  Governmental  Entity  notified  R-CUBE  of  its
     intention to conduct an  investigation  or review.  R-CUBE has all permits,
     licenses and franchises from Governmental  Entities required to conduct its
     business as now being  conducted,  except for those whose absence would not
     have a Material Adverse Effect.

          2.6 Insurance. R-CUBE maintains and at all times since January 1, 1997
     has  maintained  general  liability  insurance  that R-CUBE  believes to be
     reasonably  prudent for its business.  The Disclosure  Schedule  contains a
     complete and correct list of all insurance  policies  maintained by R-CUBE.
     R-CUBE has delivered or made  available to REI complete and correct  copies
     of all such  policies,  together  with all riders and  amendments  thereto.
     These  policies are in full force and effect,  and all premiums due thereon
     have been paid. R-CUBE has complied in all material respects with the terms
     and provisions of the policies.  In the opinion of R-CUBE reasonably formed

                                       4

<PAGE>

     and held,  there is no reasonable basis on which a claim should or could be
     made under any such policy.

          2.7 Litigation.  There is no suit, action, arbitration,  demand, claim
     or  proceeding  pending or, to the best  knowledge  of R-CUBE and  Sellers,
     threatened against R-CUBE, nor is there any judgment,  decree,  injunction,
     rule or order of any Governmental Entity or arbitrator  outstanding against
     R-CUBE that, individually or in the aggregate, could reasonably be expected
     to have a Material Adverse Effect.  R-CUBE has made available to REI or its
     counsel correct and complete copies of all  correspondence  prepared by its
     counsel for R-CUBE's  accountants in connection with the last two completed
     reviews of R-CUBE's financial  statements and any correspondence  since the
     date of the last review.

          2.8 Employee Benefits.

               (1) R-CUBE has made  available to REI a list of all  employees of
          R-CUBE and their salaries as of the date of this Agreement. R-CUBE has
          made available to REI copies or  descriptions of all written or formal
          plans or  agreements  involving  direct or  indirect  compensation  or
          benefits  (including  any employment  agreements  entered into between
          R-CUBE  and  any   employee   of  R-CUBE,   but   excluding   workers'
          compensation,  unemployment compensation and other government-mandated
          programs)  currently  or  previously  maintained,  contributed  to  or
          entered  into by R-CUBE  under which  R-CUBE has any present or future
          obligation  or  liability  (collectively,  "R-CUBE  Employee  Plans").
          Copies of all R-CUBE Employee Plans (and, if applicable, related trust
          agreements)  and all  amendments  thereto and written  interpretations
          thereof (including summary plan descriptions) have been made available
          to REI or its  counsel.  No  contributions  are due or past  due  from
          R-CUBE with respect to any of the R-CUBE  Employee  Plans. To R-CUBE's
          and Sellers'  knowledge,  each of the R-CUBE  Employee  Plans has been
          maintained  in  compliance  with its terms  and with the  requirements
          prescribed by any and all statutes, orders, rules and regulations that
          are applicable to the R-CUBE  Employee Plans except for  noncompliance
          which would not have a Material Adverse Effect.

               (2) R-CUBE has made  available to REI a list of each  employment,
          severance or other similar  contract,  arrangement  or policy and each
          plan or arrangement  providing for insurance  coverage  (including any
          self-insured  arrangements),  workers'  benefits,  vacation  benefits,
          severance    benefits,    disability    benefits,    death   benefits,
          hospitalization benefits,  retirement benefits, deferred compensation,
          profit-sharing, bonuses, stock options, stock purchase, phantom stock,
          stock  appreciation  or  other  forms  of  incentive  compensation  or
          post-retirement  insurance,  compensation  or benefits for  employees,
          consultants or directors  which (i) is not one of the R-CUBE  Employee
          Plans, (ii) is entered into, maintained or contributed to, as the case
          may be, by R-CUBE and (iii) covers any employee or former  employee of
          R-CUBE.  The  contracts,  plans  and  arrangements  described  in this
          paragraph  2.8(d) are referred to  collectively as the "R-CUBE Benefit
          Arrangements." To R-CUBE's and Sellers' knowledge,  each of the R-CUBE
          Benefit  Arrangements  has been  maintained in substantial  compliance
          with its terms  and with the  requirements  prescribed  by any and all
          statutes, orders, rules and regulations which are applicable to R-CUBE
          Benefit Arrangements.  R-CUBE has made available to REI or its counsel
          a  complete  and  correct  copy or  description  of each of the R-CUBE
          Benefit Arrangements.

                                       5

<PAGE>


               (3) There has been no amendment  to,  written  interpretation  or
          announcement   by  R-CUBE   relating   to,   or  change  in   employee
          participation  or coverage under,  any of the R-CUBE Employee Plans or
          R-CUBE Benefit Arrangements that would increase materially the expense
          of   maintaining   the  R-CUBE   Employee   Plans  or  R-CUBE  Benefit
          Arrangements  above  the  level of the  expense  incurred  in  respect
          thereof for the fiscal year ended December 31, 1998.

               (4) To R-CUBE's and Sellers'  knowledge,  R-CUBE is in compliance
          in all material  respects with all  applicable  laws,  agreements  and
          contracts relating to employment,  employment practices, wages, hours,
          and terms and conditions of employment.

          2.9 Absence of  Undisclosed  Liabilities.  Except as  disclosed on the
     Disclosure  Schedule,  at December  31,  1998 (the  "R-CUBE  Balance  Sheet
     Date"), (i) R-CUBE had no liabilities or obligations of any nature (matured
     or unmatured,  fixed or contingent) which were material to R-CUBE, taken as
     a whole,  and were not  provided  for in the  unaudited  December  31, 1998
     balance  sheet  (the  "R-CUBE  Balance  Sheet"),  a copy of which  has been
     delivered to REI; and (ii) all reserves established by R-CUBE and set forth
     in the R-CUBE Balance Sheet were reasonably adequate.

          2.10 Absence of Certain  Changes or Events.  Since the R-CUBE  Balance
     Sheet Date there has not occurred:

               (1)  any  change  in  the  condition  (financial  or  otherwise),
          properties,  assets, liabilities,  businesses,  operations, results of
          operations  or  prospects  of  R-CUBE  taken  as a  whole  that  could
          reasonably constitute a Material Adverse Effect; 

               (2) any amendments or changes in the articles of incorporation or
          bylaws of R-CUBE;

               (3) any damage, destruction or loss, whether covered by insurance
          or not, that could reasonably constitute a Material Adverse Effect;

               (4) any redemption,  repurchase or other acquisition of shares of
          R-CUBE  Common Stock by R-CUBE  (other than  pursuant to  arrangements
          with terminated employees or consultants), or any declaration, setting
          aside or payment of any  dividend  or other  distribution  (whether in
          cash, stock or property) with respect to R-CUBE Common Stock;

               (5) any material  increase in or modification of the compensation
          or  benefits  payable  or to  become  payable  by R-CUBE to any of its
          directors  or  employees,  except in the  ordinary  course of business
          consistent with past practice;

               (6)  any  material  increase  in or  modification  of any  bonus,
          pension,  insurance  or any of the  R-CUBE  Employee  Plans or  R-CUBE
          Benefit Arrangements  (including,  but not limited to, the granting of
          stock options,  restricted stock awards or stock appreciation  rights)
          made to, for or with any of its employees,  other than in the ordinary
          course of business consistent with past practice;

                                       6
<PAGE>
 
              (7) any  acquisition or sale of a material  amount of property or
          assets of  R-CUBE,  other  than in the  ordinary  course  of  business
          consistent with past practices;

               (8) any  alteration  in any term of any  outstanding  security of
          R-CUBE;

               (9) any (A) incurrence,  assumption or guarantee by R-CUBE of any
          debt  for  borrowed  money;  (B)  issuance  or sale of any  securities
          convertible into or exchangeable for debt securities of R-CUBE; or (C)
          issuance or sale of options or other  rights to acquire  from  R-CUBE,
          directly or  indirectly,  debt  securities of R-CUBE or any securities
          convertible into or exchangeable for any such debt securities;

               (10) any  creation  or  assumption  by  R-CUBE  of any  mortgage,
          pledge, security interest or lien or other encumbrance on any asset;

               (11) any making of any loan,  advance or capital  contribution to
          or  investment  in any person  other than (i) travel loans or advances
          made in the  ordinary  course of business of R-CUBE,  (ii) other loans
          and  advances in an  aggregate  amount  which does not exceed  $25,000
          outstanding  at any time and  (iii)  purchases  on the open  market of
          liquid, publicly traded securities;

               (12) any entering into, amendment of, relinquishment, termination
          or  non-renewal  by  R-CUBE  of  any  contract,   lease   transaction,
          commitment  or other right or  obligation  other than in the  ordinary
          course of business;

               (13) any  transfer  or grant of an R-CUBE  intellectual  property
          right,  other than those transferred or granted in the ordinary course
          of business;

               (14) any labor dispute or charge of unfair labor practice  (other
          than  routine  individual  grievances)  or,  to  R-CUBE  and  Sellers'
          knowledge,   any   activity  or   proceeding   by  a  labor  union  or
          representative  thereof to  organize  any  employees  of R-CUBE or any
          campaign being conducted to solicit authorization from employees to be
          represented by the labor union; or
             
               (15) any  agreement  or  arrangement  made by  R-CUBE to take any
          action which,  if taken prior to the date hereof,  would have made any
          representation  or  warranty  set  forth in this  Agreement  untrue or
          incorrect unless otherwise disclosed.

          2.11 No Defaults.  R-CUBE is not in default under, and there exists no
     event,  condition or  occurrence  which,  after notice or lapse of time, or
     both, would constitute a default by R-CUBE under, any contract or agreement
     to which R-CUBE is a party and which would, if terminated or modified, have
     a Material Adverse Effect.

          2.12 Certain  Agreements.  Neither the  execution and delivery of this
     Agreement nor the consummation of the transactions contemplated hereby will
     (i)  result  in any  payment  (including,  without  limitation,  severance,
     unemployment  compensation,  golden parachute, bonus or otherwise) becoming
     due to any  director or employee  of R-CUBE from  R-CUBE,  under any of the
     R-CUBE  Employee  Plans,  R-CUBE Benefit  Arrangements  or otherwise,  (ii)
     materially  increase 
                                       7


<PAGE>

     any benefits  otherwise payable under any of the R-CUBE Employee Plans, the
     R-CUBE   Benefit   Arrangements   or  otherwise  or  (iii)  result  in  the
     acceleration of the time of payment or vesting of any benefits.

          2.13 Taxes.

               (1) For purposes of this Agreement, "Tax" or collectively "Taxes"
          means any and all federal, state, local and foreign taxes, assessments
          and other governmental charges,  duties,  impositions and liabilities,
          including  taxes  based upon or measured  by gross  receipts,  income,
          profits,  sales,  use and  occupation,  and value  added,  ad valorem,
          transfer,  franchise,  withholding,  payroll,  recapture,  employment,
          estimated,  excise and property  taxes,  together  with all  interest,
          penalties and additions  imposed with respect to those amounts and any
          obligations under any agreements or arrangements with any other person
          with respect to those amounts and including any liability for taxes of
          a predecessor entity.

               (2) Except as set forth in the Disclosure  Schedule:  

                         (i)   As of the Closing,  R-CUBE will have prepared and
                    filed  all  required  federal,  state,  local,  and  foreign
                    returns,  estimates,  information  statements,  and  reports
                    relating  to any and all  Taxes  ("Returns")  concerning  or
                    attributable  to R-CUBE that are  required to be filed by or
                    with respect to R-CUBE on or prior to the Closing,  and each
                    of the  Returns  shall be, to the  knowledge  of R-CUBE  and
                    Sellers,   true,  correct,  and  complete  in  all  material
                    respects and shall have been  completed in  accordance  with
                    applicable law;  

                         (ii)  As of the Closing,  R-CUBE: (A) will have paid or
                    accrued in accordance  with  generally  accepted  accounting
                    principles all Taxes  concerning or  attributable  to R-CUBE
                    relating  to  periods   ending  on  or  before  the  Closing
                    regardless of whether reflected on Returns and (B) will have
                    withheld  with  respect to their  employees  all federal and
                    state income taxes,  FICA, FUTA, and other Taxes required to
                    be withheld;

                         (iii) R-CUBE  has not been delinquent in the payment of
                    any  Tax  nor  is  there  any  Tax  deficiency  outstanding,
                    proposed or assessed against R-CUBE, nor has R-CUBE executed
                    any waiver of the statute of limitations on or extending the
                    period for the assessment or collection of any Taxes;

                         (iv)  No  audit or other  examination  of any Return of
                    R-CUBE  is  presently  in  progress,  nor  has  R-CUBE  been
                    notified of any request for an audit or examination;

                         (v)   R-CUBE  has no  liabilities  for unpaid  federal,
                    state,  local and foreign  Taxes which have not been accrued
                    or reserved in accordance with generally accepted accounting
                    principles on the R-CUBE Balance Sheet;

                         (vi)  R-CUBE  has made available to REI and its counsel
                    copies of all federal  and state  income and all state sales
                    and use Tax  Returns  for all  periods  ending  on or  after
                    December 31, 1995;

                                       8
<PAGE>


                         (vii) There  are (and as of  immediately  following the
                    Closing there will be) no liens, pledges,  charges,  claims,
                    security  interests,  or  other  encumbrances  of  any  sort
                    ("Liens") on the assets of R-CUBE  relating or  attributable
                    to Taxes  other than liens for sales and  payroll  taxes not
                    yet due and payable;
                        
                         (viii) R-CUBE has no knowledge of any reasonable  basis
                    for the assertion of any claim relating or  attributable  to
                    Taxes which,  if adversely  determined,  would result in any
                    Lien on the assets of R-CUBE;

                         (ix)  None  of the assets of R-CUBE is property that is
                    required to be treated as owned by any other person pursuant
                    to the "safe harbor lease" provisions of former Code Section
                    168(f)(8),  and none of the assets is treated as "tax-exempt
                    use property" within the meaning of Code Section 168(h);

                         (x)   R-CUBE has not filed any consent  agreement under
                    Code Section  341(f) or agreed to have Code  Section  341(f)
                    apply to any  disposition  of a  "subsection  (f) asset" (as
                    defined in Code Section 341(f)(4)) owned by R-CUBE;

                         (xi)  R-CUBE    has   not   been    included   in   any
                    "consolidated," "unitary," or "combined" Return provided for
                    under the law of the United  States or any state or locality
                    with respect to Taxes for any taxable period;
        
                         (xii) R-CUBE   is  not  a  party  to  a  tax   sharing,
                    allocation,   indemnification   or  similar   agreement   or
                    arrangement,  and R-CUBE  does not owe any amount  under any
                    agreement or arrangement;

                         (xiii)  No  Return  of  R-CUBE  contains  a  disclosure
                    statement under Code Section 6662 (or predecessor provision)
                    or any similar provision of state, local, or foreign law;

                         (xiv) R-CUBE  is not  and has  not  been at any  time a
                    "United States real property holding corporation" within the
                    meaning of Code Section 897(c)(2);

                         (xv)  No  indebtedness of R-CUBE consists of "corporate
                    acquisition indebtedness" within the meaning of Code Section
                    279;

                         (xvi) R-CUBE has not taken any action not in accordance
                    with past  practice  that would have the effect of deferring
                    any Tax liability of R-CUBE from any period ending on before
                    the Closing  Date to any  taxable  period  ending  after the
                    Closing Date;

                         (xvii)  R-CUBE was not acquired in a  "qualified  stock
                    purchase"  under Code  Section  338(d)(3),  and no elections
                    under  Code  Section  338(g),   protective  carryover  basis
                    elections, or offset prohibition elections are applicable to
                    R-CUBE or any predecessor corporations; and

                                        9
 
<PAGE>

                        (xviii)  The tax  bases of the  assets  of  R-CUBE  for
                    purposes of determining future  amortization,  depreciation,
                    and other  federal  income  tax  deductions  are  accurately
                    reflected on the tax books and records of R-CUBE.

          2.14 Intellectual Property. There are no patents, patent applications,
     trademarks,  service marks, trademark and service mark applications,  trade
     names and copyrights  material to the lawful and efficient operation of the
     business of R-CUBE as presently  conducted and as presently  proposed to be
     conducted.

          2.15  Fees  and  Expenses.  Except  as set  forth  on  the  Disclosure
     Schedule,  neither R-CUBE nor Sellers have paid or become  obligated to pay
     any fee or commission to any broker,  finder or  intermediary in connection
     with the  transactions  contemplated by this Agreement.  Sellers agree that
     any such fees or commissions  described in the preceding  sentence shall be
     the sole responsibility of Sellers, whether or not the Closing occurs.

          2.16 Environmental Matters.

               (1) To R-CUBE's and Seller's knowledge, none of the properties or
          facilities  of R-CUBE is in violation  of any federal,  state or local
          law, ordinance,  regulation or order relating to industrial hygiene or
          to the  environmental  conditions on, under or about the properties or
          facilities,  including,  but not  limited  to,  soil and ground  water
          condition  except where the violations would not constitute a Material
          Adverse  Effect.  During the time that  R-CUBE has owned or leased its
          properties  and  facilities,  neither  R-CUBE  nor,  to  R-CUBE's  and
          Sellers' knowledge,  any third party, has released,  used,  generated,
          manufactured or stored on, under or about the properties or facilities
          or  transported  to or from the properties or facilities any hazardous
          materials.

               (2)  During  the  time  that  R-CUBE  has  owned  or  leased  its
          properties  and  facilities,  there has been no litigation  brought or
          threatened  against  R-CUBE  by, or any  settlement  reached by R-CUBE
          with, any party or parties alleging the presence, disposal, release or
          threatened release of any hazardous materials on, from or under any of
          the properties or facilities.

          2.17 [Intentionally Omitted].

          2.18  Disclosure.  No  representation  or  warranty  made by R-CUBE or
     Sellers  in this  Agreement  or the  Other  Agreements,  nor any  document,
     written information, written statement, financial statement, certificate or
     exhibit  prepared and furnished or to be prepared and furnished by Sellers,
     R-CUBE or their  representatives  pursuant to this  Agreement  or the Other
     Agreements or in connection with the  transactions  contemplated  hereby or
     thereby,  when taken together,  contains any untrue statement of a material
     fact, or omits to state a material fact necessary to make the statements or
     facts  contained   herein  or  therein  not  misleading  in  light  of  the
     circumstances under which they were furnished.

          2.19  Restrictions  on  Business  Activities.  There  is  no  material
     agreement,  judgment,  injunction, order or decree binding upon R-CUBE that
     has or could  reasonably be expected to have the effect of  prohibiting  or
     materially  impairing any business  practice of R-CUBE,  

                                       10
<PAGE>

     any  acquisition of property by R-CUBE or the conduct of business by R-CUBE
     as currently conducted.

          2.20 Accounts Receivable.  The accounts receivable shown on the R-CUBE
     Balance Sheet as of the R-CUBE  Balance Sheet Date, or thereafter  acquired
     prior  to the  date  hereof,  have  been  and  are  (as  the  case  may be)
     collectible  within 120 days from the Closing Date in amounts not less than
     the aggregate amounts thereof carried on the books of R-CUBE reduced by the
     reserves for discounts and bad debts taken on the R-CUBE Balance Sheet.

          2.21 Personal  Property.  R-CUBE has good title, free and clear of all
     title defects, objections and liens, including without limitation,  leases,
     chattel  mortgages,   conditional  sales  contracts,   collateral  security
     arrangements and other title or interest-retaining  arrangements, to all of
     its machinery, equipment, furniture, inventory and other personal property.
     All personal  property used in the business of R-CUBE is in good  operating
     condition.  All of the leases to personal property utilized in the business
     of R-CUBE are valid and  enforceable  against R-CUBE and are not in default
     by R-CUBE, or, to the knowledge of R-CUBE or Sellers,  are any of the other
     parties thereto in default thereof.

          2.22  Real  Property.  R-CUBE  does  not own any  real  property.  The
     Disclosure  Schedule  contains a list of all leases  for real  property  to
     which  R-CUBE is a party,  the square  footage  leased with respect to each
     lease and the  expiration  date of each lease.  These  leases are valid and
     enforceable and are not in default. To the knowledge of R-CUBE and Sellers,
     the real property leased or occupied by R-CUBE,  the  improvements  located
     thereon,  and  the  furniture,  fixtures  and  equipment  relating  thereto
     (including  plumbing,  heating,  air conditioning and electrical  systems),
     conform to any and all applicable health,  fire, safety,  zoning,  land use
     and building  laws,  ordinances and  regulations.  There are no outstanding
     contracts  made by R-CUBE for any  improvements  made to the real  property
     leased or occupied by R-CUBE that have not been paid for.

          2.23 Warranties.  R-CUBE has made no warranties or guarantees relating
     to its  services  other than as implied or required  by law.  R-CUBE has no
     warranty  or  indemnification  obligations  relating  to  patents  or other
     proprietary rights.

          2.24  Contracts.  The  Disclosure  Schedule  lists all oral or written
     agreements,  notes,  instruments or contracts to which R-CUBE is a party or
     by which its assets or properties may be bound which involve the payment or
     receipt of more than $25,000 (on an annual basis),  or which have a term of
     more than one year, or which involve  intellectual  property,  or which are
     employment or consulting agreements ("R-CUBE Contracts").  R-CUBE is not in
     default in performance of its obligations under any material  provisions of
     the R-CUBE Contracts.  Neither R-CUBE nor Sellers have any knowledge of any
     violation  of or  default  under any  R-CUBE  Contract  by any other  party
     thereto  or any  knowledge  of any  intent by any other  party to an R-CUBE
     Contract not to perform its obligations under any R-CUBE Contract.

          2.25 No  Goods or  Products.  R-CUBE  does not and has not  developed,
     sold, marketed or distributed any goods or products.

                                       11

<PAGE>

     3.   REPRESENTATIONS AND WARRANTIES OF REI.

          REI hereby represents and warrants to R-CUBE and Seller that:

          3.1  Organization;  Good Standing;  Qualification  and Power. REI is a
     corporation  duly  incorporated,  organized,  validly  existing and in good
     standing under the laws of the jurisdiction of its  incorporation,  has all
     requisite  corporate  power and  authority  to own,  lease and  operate its
     properties and to carry on its business as now being conducted, and is duly
     qualified and in good standing to do business in each jurisdiction in which
     the nature of its business or the  ownership  or leasing of its  properties
     makes  qualification  necessary,  other  than in  jurisdictions  where  the
     failure to qualify would not have a Material  Adverse Effect.  REI has made
     available  to R-CUBE or its  counsel  complete  and  correct  copies of the
     certificate of incorporation  and bylaws of REI, in each case as amended to
     the date of this  Agreement,  and  copies of all  minutes of  meetings  and
     actions by written consent of shareholders,  directors and board committees
     of REI.

          3.2 Capital Structure.

               3.2.1 Stock,  Options and Warrants.  The authorized capital stock
          of REI consists of 20,000,000  shares of common stock,  $.01 par value
          per share ("REI  Common  Stock"),  and  5,000,000  shares of Preferred
          Stock, $.01 par value per share ("REI Preferred Stock").  At the close
          of business on January 13, 1999,  5,680,710 shares of REI Common Stock
          were issued and  outstanding,  and 599,850  shares of REI Common Stock
          were  reserved for issuance upon the exercise of  outstanding  options
          ("REI  Options") and warrants ("REI  Warrants") to purchase REI Common
          Stock. No shares of REI Preferred Stock are issued or outstanding. All
          outstanding shares of REI Common Stock are validly issued,  fully paid
          and nonassessable and not subject to preemptive  rights.  REI has made
          available to R-CUBE true and correct copies of its 1996, 1997 and 1998
          Stock  Option  Plans  (each an "REI Plan" and  collectively,  the "REI
          Plans").

               3.2.2 No Other  Commitments.  Except for the REI  Options and REI
          Warrants  disclosed  in or  pursuant  to Section  3.2.1,  there are no
          options,  warrants, calls, rights,  commitments,  conversion rights or
          agreements of any character to which REI is a party or by which REI is
          bound obligating REI to issue, deliver or sell, or cause to be issued,
          delivered or sold,  any shares of capital  stock of REI or  securities
          convertible  into or exchangeable  for shares of capital stock of REI,
          or  obligating  REI to grant,  extend or enter  into any such  option,
          warrant, call, right, commitment, conversion right or agreement. There
          are no voting trusts or other  agreements or  understandings  to which
          REI is a party with respect to the voting of the capital stock of REI.

          3.3 Authority.

               3.3.1 Corporate Action. REI has all requisite corporate power and
          authority to enter into this Agreement and to perform its  obligations
          hereunder  and to consummate  the  transactions  contemplated  by this
          Agreement. The execution and delivery of this Agreement by REI and the
          consummation by REI of the transactions  contemplated hereby have been
          duly authorized by all necessary  corporate action on the part of REI.
          This  Agreement  has been duly executed and delivered by REI, and this
          Agreement is the valid and binding  obligation of REI,  enforceable in
        
                                       12
<PAGE>

          accordance with its terms,  except that  enforceability may be subject
          to (i) bankruptcy,  insolvency,  reorganization  or other similar laws
          affecting or relating to  enforcement of creditors'  rights  generally
          and (ii) general equitable principles.

               3.3.2  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions  contemplated  hereby nor compliance  with the provisions
          hereof will conflict  with, or result in any violations of, or cause a
          default (with or without  notice or lapse of time, or both) under,  or
          give  rise to a  right  of  termination,  amendment,  cancellation  or
          acceleration  of any  obligation  contained  in,  or the  loss  of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of REI under, any term, condition or provision of
          (x) the certificate of  incorporation or bylaws of REI or (y) any loan
          or credit agreement,  note, bond, mortgage,  indenture, lease or other
          material agreement,  judgment, order, decree, statute, law, ordinance,
          rule or regulation  applicable to REI or its respective  properties or
          assets, other than any such conflicts,  violations,  defaults, losses,
          liens, security interests, charges or encumbrances which, individually
          or in the aggregate, would not have a Material Adverse Effect.

               3.3.3  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          Governmental  Entity is required  to be obtained by REI in  connection
          with the execution and delivery of this Agreement or the  consummation
          of the transactions contemplated hereby.

          3.4 SEC Documents.

               3.4.1  SEC  Reports.  REI has made  available  to  R-CUBE  or its
          counsel  correct  and  complete  copies  of  each  report,   schedule,
          registration  statement and definitive  proxy  statement  filed by REI
          with  the  Securities  and  Exchange  Commission  ("SEC")  on or after
          January 1, 1997  ("REI SEC  Documents"),  which are all the  documents
          (other than  preliminary  material) that REI was required to file with
          the SEC on or after that date. As of their respective dates or, in the
          case of registration statements,  their effective dates (or if amended
          or superseded by a filing prior to the date of this Agreement, then on
          the date of such filing), none of the REI SEC Documents (including all
          exhibits and schedules thereto and documents incorporated by reference
          therein)  contained any untrue statement of a material fact or omitted
          to state a material fact required to be stated therein or necessary in
          order to make the statements  therein,  in light of the  circumstances
          under which they were made, not misleading,  and the REI SEC Documents
          complied when filed in all material  respects with the then applicable
          requirements  of the Securities Act or the Securities  Exchange Act of
          1934,  as amended,  as the case may be, and the rules and  regulations
          promulgated  by the SEC  thereunder.  REI has filed all  documents and
          agreements  which were required to be filed as exhibits to the REI SEC
          Documents.

               3.4.2  Financial  Statements.  The  financial  statements  of REI
          included in the REI SEC Documents  complied as to form in all material
          respects  with the then  applicable  accounting  requirements  and the
          published rules and regulations of the SEC with respect thereto,  were
          prepared in accordance with generally accepted  accounting  principles
          applied on a consistent  basis during the periods  involved (except as
          may have been  indicated  in the notes  thereto or, in the case of the
          unaudited  statements,  as permitted by Form 10-QSB promulgated by the
          SEC)  and  fairly  

                                       13
<PAGE>

          present  the  financial  position  of REI as at the  respective  dates
          thereof  and the  results  of its  operations  and cash  flows for the
          respective periods then ended.

          3.5 Litigation.  There is no suit, action, arbitration,  demand, claim
     or proceeding pending or, to the best knowledge of REI,  threatened against
     REI in connection with or relating to the transactions contemplated by this
     Agreement or of any action taken or to be taken in  connection  herewith or
     the consummation of the transactions contemplated hereby.

          3.6 Fees and Expenses. REI has not paid or become obligated to pay any
     fee or commission to any broker,  finder or intermediary in connection with
     the transactions contemplated by this Agreement.

          3.7  Disclosure.  No  representation  or warranty  made by REI in this
     Agreement,  nor  any  document,  written  information,  written  statement,
     financial  statement,  certificate or exhibits prepared and furnished or to
     be prepared and furnished by REI or its representatives  pursuant hereto or
     in  connection  with  the  transactions  contemplated  hereby,  when  taken
     together,  contains any untrue  statement of a material  fact,  or omits to
     state a material fact necessary to make the  statements or facts  contained
     herein or therein not misleading in light of the circumstances  under which
     they were furnished.

          3.8 Financial  Capacity.  REI has the financial  capability to pay the
     Purchase Price when due.

      4.  R-CUBE AND SELLERS' COVENANTS.

          4.1  Notification of Changes.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in  accordance  with its terms,  R-CUBE and Sellers will promptly
     notify REI in writing (a) of any event occurring  subsequent to the date of
     this Agreement that would render any  representation  or warranty of R-CUBE
     or any Seller contained in this Agreement or the Other Agreements,  if made
     on or as of the date of the event or the Closing Date, untrue or inaccurate
     in any material respect,  (b) of any Material Adverse Effect and (c) of any
     breach by R-CUBE or any Seller of any  covenant or  agreement  contained in
     this Agreement or the Other Agreements.

          4.2  Maintenance of Business.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance  with its terms,  R-CUBE and Sellers will use their
     reasonable  commercial  efforts to carry on and preserve  R-CUBE's business
     and its relationships  with customers,  suppliers,  employees and others in
     substantially the same manner as it has prior to the date hereof. If R-CUBE
     or  any  Seller  becomes  aware  of  any  material   deterioration  in  the
     relationship with any material customer, material supplier or key employee,
     R-CUBE or that Seller will promptly bring that information to the attention
     of REI.

          4.3  Conduct of  Business.  During  the  period  from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance with its terms, R-CUBE will, and Sellers will cause
     R-CUBE to,  continue to conduct its  business  and  maintain  its  

                                       14
<PAGE>

     business  relationships  in the  ordinary  and usual  course  and will not,
     without the prior written consent of REI:

               (1)  borrow  any money  except  for  amounts  that are not in the
          aggregate  material to the financial  condition of R-CUBE,  taken as a
          whole;

               (2)  enter  into any  material  transaction  not in the  ordinary
          course of its business;

               (3) encumber or permit to be encumbered  any of its assets except
          in the ordinary course of its business;

               (4) dispose of any of its assets except in the ordinary course of
          business consistent with past practice;

               (5) enter into any material lease or contract for the purchase or
          sale or  license  of any  property,  real or  personal,  except in the
          ordinary course of business;

               (6) fail to  maintain  its  equipment  and  other  assets in good
          working condition and repair according in all material respects to the
          standards it has  maintained  to the date of this  Agreement,  subject
          only to ordinary wear and tear;

               (7)  pay  (or   make   any  oral  or   written   commitments   or
          representations  to  pay)  any  bonus,  increased  salary  or  special
          remuneration to any officer, employee or consultant (except for normal
          salary increases  consistent with past practices not to exceed 10% per
          year) or enter into or vary the terms of any employment, consulting or
          severance  agreement with any person, pay any severance or termination
          pay (other than payments  made in accordance  with plans or agreements
          existing  on the date  hereof),  grant any  stock  option or issue any
          restricted stock, or enter into or modify any agreement or plan of the
          type described in Section 2.8;

               (8) change accounting methods;

               (9) declare, set aside or pay any cash or stock dividend or other
          distribution  in  respect  of capital  stock,  or redeem or  otherwise
          acquire any of its capital stock (other than pursuant to  arrangements
          with  terminated  employees or consultants  in the ordinary  course of
          business consistent with R-CUBE's past practice);

               (10) amend or  terminate  any  material  contract,  agreement  or
          license to which it is a party except those  amended or  terminated in
          the  ordinary  course of its  business,  or which are not  material in
          amount or effect;

               (11) alter in any way its manner of paying  payables,  collecting
          receivables or ordering products and services;

               (12) lend any  amount to any  person or  entity,  other  than (i)
          advances  for travel and  expenses  which are incurred in the ordinary
          course of business  consistent  with past  

                                       15


<PAGE>

          practice,  not material in amount and  documented  by receipts for the
          claimed amounts, or (ii) any loans pursuant to any R-CUBE 401(a) Plan;

               (13) guarantee or act as a surety for any obligation,  except for
          obligations in amounts that are not material;

               (14) waive or release any right or claim except for the waiver or
          release of  non-material  claims in the  ordinary  course of business,
          consistent  with past  practice  or the waiver or release of rights or
          claims set forth in the Disclosure Schedule;

               (15) issue or sell any shares of its  capital  stock of any class
          or any  other of its  securities,  or issue or  create  any  warrants,
          obligations,  subscriptions,  options, convertible securities or other
          commitments  to issue  shares of  capital  stock,  or  accelerate  the
          vesting of any outstanding option or other security;

               (16) split or combine the outstanding shares of its capital stock
          of any class or enter into any recapitalization or agreement affecting
          the number or rights of outstanding shares of its capital stock of any
          class or affecting any other of its securities;

               (17)  merge,  consolidate  or  reorganize  with,  or acquire  any
          entity;

               (18) conduct any  negotiations or agreements of any kind with any
          other  parties  with  respect to the sale of the assets or the capital
          stock of R-CUBE,  or for the  merger or sale of R-CUBE  with or to any
          other entity;

               (19) amend its articles of incorporation or bylaws;

               (20) license any intellectual property rights of R-CUBE except in
          the ordinary course of business consistent with past practice;

               (21) agree to any audit assessment by any tax authority;

               (22) change any insurance coverage; or

               (23) agree to do any of the  things  described  in the  preceding
          clauses in this Section 4.3.

          4.4 Regulatory  Approvals.  R-CUBE will promptly  execute and file, or
     join in the execution and filing of, any application or other document that
     may be necessary in order to obtain the authorization,  approval or consent
     of any governmental body,  federal,  state, local or foreign,  which may be
     required,  or which REI may  reasonably  request,  in  connection  with the
     consummation of the  transactions  contemplated  by this Agreement.  R-CUBE
     will use its reasonable efforts to promptly obtain all such authorizations,
     approvals and consents.

          4.5 Necessary Consents. During the term of this Agreement, R-CUBE will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 

                                       16

<PAGE>

     or  appropriate  in addition to those set forth in Section 4.4 to allow the
     consummation of the transactions contemplated hereby.

          4.6 Access to  Information.  Upon the  execution of a  confidentiality
     agreement, the form and substance of which is mutually acceptable to R-CUBE
     and REI, R-CUBE and Sellers will allow REI and its agents reasonable access
     to the files,  books,  records  and offices of R-CUBE,  including,  without
     limitation,   any  and  all   information   relating  to  R-CUBE's   taxes,
     commitments,  contracts, leases, licenses and real, personal and intangible
     property and financial  condition.  R-CUBE and Sellers will cause  R-CUBE's
     accountants to cooperate with REI and its agents in making available to REI
     all  financial  information   reasonably  requested,   including,   without
     limitation,  the right to examine all working papers  pertaining to all tax
     returns and financial statements prepared or reviewed by the accountants.

          4.7  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  R-CUBE and Sellers  will use  reasonable  efforts to satisfy or
     cause to be satisfied all the  conditions  precedent  that are set forth in
     Sections  10 and 11,  and  R-CUBE  and  Sellers  will use their  reasonable
     efforts to cause the  transactions  contemplated  by this  Agreement  to be
     consummated.

          4.8  Confidentiality.  All  information  concerning  REI or any of its
     subsidiaries ("REI  Subsidiaries")  received by R-CUBE or any Seller (other
     than that  information  which is a matter of public  knowledge or which has
     been published for public  distribution or filed as public information with
     any  governmental  authority)  shall not at any time,  except in connection
     with this Agreement and the transactions  contemplated  hereby, be used for
     the advantage of, or disclosed by, R-CUBE or any Seller to any third person
     without the prior written  consent of REI.  R-CUBE and Sellers may disclose
     the  information on a confidential  basis to their  affiliates,  employees,
     officers,  agents,  auditors,  investment  bankers,  consultants,  counsel,
     directors,   present  and  prospective   lenders,  and  state  and  federal
     regulatory  agencies.  This  covenant  shall  expire on  completion  of the
     Closing;  provided,  however,  that if the Closing does not occur, it shall
     expire three years after the date of this Agreement.

          4.9 Cooperation in Review of R-CUBE Financial  Statements.  R-CUBE and
     Sellers shall  cooperate  fully with REI and its  representatives  in their
     review of the R-CUBE  Financial  Statements  and the Final  Balance  Sheet,
     including  providing  access to the information  referred to in Section 4.6
     and any other information necessary in order to complete their review.

      5.  REI COVENANTS

          5.1 Regulatory Approvals.  REI will promptly execute and file, or join
     in the execution and filing of, any  application or other document that may
     be necessary in order to obtain the  authorization,  approval or consent of
     any  governmental  body,  federal,  state,  local or  foreign  which may be
     required,  or which R-CUBE may reasonably  request,  in connection with the
     consummation of the transactions  contemplated by this Agreement.  REI will
     use its  reasonable  efforts to  promptly  obtain all such  authorizations,
     approvals and consents.

          5.2 Necessary  Consents.  During the term of this Agreement,  REI will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 
                                       17

<PAGE>

     or  appropriate  in addition to those set forth in Section 5.1 to allow the
     consummation of the transactions contemplated hereby.

          5.3  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  REI will use its  reasonable  efforts to satisfy or cause to be
     satisfied all the conditions precedent that are set forth in Sections 9 and
     11,  and REI will use its  reasonable  efforts  to cause  the  transactions
     contemplated by this Agreement to be consummated.

          5.4 Confidentiality. All information concerning R-CUBE received by REI
     (other than that information which is a matter of public knowledge or which
     has been published for public  distribution or filed as public  information
     with  any  governmental  authority)  shall  not  at  any  time,  except  in
     connection with this Agreement and the transactions contemplated hereby, be
     used for the advantage of, or disclosed by, REI to any third person without
     the prior written consent of R-CUBE.  REI may disclose the information on a
     confidential  basis  to  its  affiliates,   employees,   officers,  agents,
     auditors, investment bankers, consultants,  counsel, directors, present and
     prospective  lenders,  and state and federal  regulatory  agencies  and, as
     provided  elsewhere in this  Agreement,  may disclose such  information  in
     press  releases  and  like  disclosures,  filings  with  the  SEC or  other
     governmental or  self-regulatory  agencies or as otherwise  required.  This
     covenant shall expire on completion of the Closing; provided, however, that
     if the Closing  does not occur,  it shall expire three years after the date
     of this Agreement.

      6.  EMPLOYEE MATTERS

          Following  the  Closing,  all  employees  of R-CUBE  will  either  (i)
     continue to be employees of R-CUBE or (ii) be offered employment by REI. In
     either case, those employees will be provided  employment benefits that are
     at least  comparable  to those they  currently  receive from R-CUBE and, if
     necessary,  R-CUBE or REI shall continue to sponsor those employees for the
     purpose of maintaining such employees' United States resident alien status.
     Notwithstanding  the foregoing,  REI makes no  representation,  warranty or
     promise as to the length of time that any such  employee will remain in the
     employ of R-CUBE or REI following the Closing.

                                       18

<PAGE>

      7.  INDEMNIFICATION OF THE PARTIES.

          7.1 Indemnification by Sellers

               (1) Sellers  shall,  jointly and  severally,  indemnify,  defend,
          protect and hold harmless REI, R-CUBE,  each of the REI  Subsidiaries,
          each of their  respective  successors  and  assigns  and each of their
          respective directors, officers, employees, agents and affiliates (each
          an "REI  Indemnified  Party"),  against all losses,  claims,  damages,
          actions, suits, proceedings, demands, assessments,  adjustments, costs
          and  expenses   (including   specifically,   but  without  limitation,
          reasonable  attorneys' fees and expenses of investigation  ("Losses"))
          based upon,  resulting  from or arising out of (i) any  inaccuracy  or
          breach  of  any  representation  or  warranty  of  R-CUBE  or  Sellers
          contained in or made in connection with this  Agreement,  and (ii) the
          breach by R-CUBE or Sellers of, or the failure by R-CUBE or Sellers to
          observe,  any  of  their  respective  covenants  or  other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.1  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          REI under  this  Section  7.1  thereafter);  provided,  however,  that
          Sellers  shall  indemnify  REI for any and all  Taxes  incurred  by or
          attributable to R-CUBE prior to the Closing,  and the  indemnification
          period  relating to any Taxes shall  terminate  on the tenth day after
          the expiration of the applicable  period of limitations on assessments
          and  collections  applicable to such taxes under the Internal  Revenue
          Code of 1986.

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by  Seller  under  Section  7.1(a)  shall not  exceed  50% of the
          Purchase  Price as  adjusted  pursuant  to Section  1.3 and net of any
          insurance  proceeds  received by REI, and Seller shall not be required
          to indemnify,  defend,  protect and hold  harmless an REI  Indemnified
          Party  pursuant  to  Section  7.1(a)  for  Losses  incurred  by an REI
          Indemnified  Party  with  respect to any  inaccuracy  or breach of any
          representation or warranty of R-CUBE or Sellers contained in Section 2
          of this  Agreement  or the  Other  Agreements  unless  and  until  the
          aggregate amount of such Losses exceeds $25,000, at which time the REI
          Indemnified  Parties  shall be entitled to  indemnification  hereunder
          with respect to all such  aggregate  amount of Losses  (including  the
          first  $25,000 of Losses) and any Losses  incurred or suffered by them
          thereafter.

          7.2 Indemnification by REI

               (1) REI  shall  indemnify,  defend,  protect  and  hold  harmless
          Sellers (each a "Seller  Indemnified  Party") against all Losses based
          upon, resulting from or arising out of (i) any inaccuracy or breach of
          any  representation,  or  warranty  of REI  contained  in or  made  in
          connection with this Agreement,  and (ii) the breach by REI of, or the
          failure by REI to observe,  any of its  covenants or other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.2  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          Sellers under this Section 7.2 thereafter).

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by REI under Section  7.2(a) shall not exceed 50% of the Purchase
          Price as adjusted  per Section 1.3 and net of any  insurance  proceeds
          received  by  Sellers,  and REI shall not be  required  to  indemnify,
          defend,  protect and hold harmless a Seller Indemnified Party pursuant
          to Section 7.2(a) for Losses  

                                       19

<PAGE>

          incurred by a Seller  Indemnified Party with respect to any inaccuracy
          or breach of any  representation  or warranty of REI contained in this
          Agreement unless and until the aggregate amount of such Losses exceeds
          $25,000,  at  which  time  the  Seller  Indemnified  Parties  shall be
          entitled  to  indemnification  hereunder  with  respect  to  all  such
          aggregate amount of Losses (including the first $25,000 of Losses) and
          any Losses incurred or suffered by them thereafter.

          7.3 Manner of Indemnification.  All indemnification under this Section
     7 shall be effected by the payment of cash or delivery of a bank  cashier's
     check, or by a combination of the foregoing.

      8.  CLOSING.

          8.1 Closing  Date.  Subject to the  termination  of this  Agreement as
     provided  in Section 12, the closing of the  transactions  contemplated  by
     this Agreement ("Closing") will take place at the offices of Rutan & Tucker
     LLP,  611 Anton,  Suite  1400,  Costa  Mesa,  California  92626 on the date
     following  satisfaction  of all  conditions set forth in Sections 9, 10 and
     11,  which  date  shall be  within  30 days of the date of this  Agreement,
     unless another place, time and date is selected by R-CUBE and REI ("Closing
     Date").

          8.2  Deliveries by R-CUBE and Sellers at the Closing.  At the Closing,
     R-CUBE and Sellers shall deliver to REI:

               (1) Certificates representing all of the Shares, free of liens or
          encumbrances, accompanied by duly executed stock powers by each Seller
          in favor of REI with all necessary  transfer stamps affixed thereto or
          other evidence of payment of applicable stock transfer taxes, if any;

               (2) The Final Balance Sheet;

               (3)  The  officers'  and  Sellers'  certificates  referred  to in
          Sections 10.1, 10.2 and 10.4; and

               (4) The opinion referred to in Section 10.7.

          8.3 Delivery by REI at the Closing. At the Closing,  REI shall deliver
     to  Seller  a  cashier's  check  or  evidence  of wire  transfer  of  funds
     representing the Purchase Price for the Seller's Shares.

      9.  CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE AND SELLER.

          The  obligations  of R-CUBE and Seller  hereunder  are  subject to the
     fulfillment  or  satisfaction  on or  before  the  Closing  of  each of the
     following  conditions (any one of which may be waived by R-CUBE and Seller,
     but only in a writing signed by R-CUBE and Seller):

          9.1 Accuracy of Representations and Warrants.  The representations and
     warranties  of REI set  forth in  Section 3 shall be true and  accurate  in
     every  material  respect on and 

                                       20

<PAGE>

     as of the  Closing  Date with the same force and effect as if they had been
     made at the Closing except to the extent the failure of the representations
     and  warranties  to be true and  accurate in such  respects has not had and
     could not  reasonably be expected to have a Material  Adverse  Effect,  and
     R-CUBE shall receive a certificate  to that effect  executed by REI's Chief
     Executive Officer and Chief Financial Officer.

          9.2  Covenants.  REI shall have performed and complied in all material
     respects  with all of its  covenants  required to be  performed by it under
     this  Agreement  on or before  the  Closing,  and  R-CUBE  shall  receive a
     certificate  to that  effect  signed by REI's Chief  Executive  Officer and
     Chief Financial Officer.

          9.3 Compliance with Law. There shall be no order,  decree or ruling of
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

      10. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI.

          The  obligations  of REI hereunder are subject to the  fulfillment  or
     satisfaction on or before the Closing, of each of the following  conditions
     (any one or more of  which  may be  waived  by REI,  but only in a  writing
     signed by REI).

          10.1 Accuracy of Representations and Warrants. The representations and
     warranties  of R-CUBE and Sellers set forth in Section 2 of this  Agreement
     and the  Other  Agreements  shall be true and  accurate  in every  material
     respect on and as of the Closing  Date with the same force and effect as if
     they had been made at the  Closing  except to the extent the failure of the
     representations and warranties to be true and accurate in such respects has
     not had and could not  reasonably  be expected  to have a Material  Adverse
     Effect, and REI shall receive  certificates to that effect executed by each
     Seller and by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.2  Covenants.  R-CUBE and Sellers shall have performed and complied
     in all  material  respects  with  all of  their  covenants  required  to be
     performed  by them  under this  Agreement  and the Other  Agreements  on or
     before the  Closing,  and REI shall  receive  certificates  to that  effect
     signed by each Seller and by  R-CUBE's  Chief  Executive  Officer and Chief
     Financial Officer.

          10.3  Completion of Due  Diligence.  REI shall have  conducted its due
     diligence  investigation of R-CUBE and shall have  determined,  in its sole
     and absolute discretion,  that the business,  records,  assets,  contracts,
     liabilities,  operations  and other  aspects of the business of R-CUBE (the
     "Business Aspects") are satisfactory to REI in all respects. REI shall have
     seven days (the  "Initial  Diligence  Period")  following  the date of this
     Agreement  to use its  reasonable  efforts  to  perform  its due  diligence
     investigation  of R-CUBE.  If, at the expiration of such Initial  Diligence
     Period,  REI shall request  additional  time to complete its due diligence,
     R-CUBE  and  Sellers  may  promptly  grant or deny  such  request  in their
     reasonable  discretion.  If such  request is granted,  it shall allow REI a
     minimum of three additional working days (the "Extension Diligence Period")
     to complete its due diligence investigation.  Within two days following the
     expiration  of the Initial  

                                       21

<PAGE>

     Diligence  Period and the  Extension  Diligence  Period,  if any, REI shall
     notify  R-CUBE  and  Sellers  as to  whether,  in REI's  sole and  absolute
     discretion, the Business Aspects are satisfactory to REI in all respects.

          10.4 Absence of Material Adverse Change. There shall not have been any
     material  adverse  change  in  the  condition   (financial  or  otherwise),
     properties,  assets,  liabilities,   businesses,   operations,  results  of
     operations or prospects of R-CUBE,  taken as a whole,  other than:  (a) any
     adverse effect resulting from conditions affecting the engineering software
     industry as a whole or the United States economy as a whole;  (b) a failure
     by R-CUBE to meet  internal  earnings  or revenue  projections;  or (c) any
     disruption of customer or supplier  relationships  arising primarily out of
     or  resulting  primarily  from  actions  contemplated  by  the  parties  in
     connection with, or which is primarily  attributable to the announcement of
     this  Agreement and the  transactions  contemplated  hereby,  to the extent
     attributable  thereto,  and REI shall receive a certificate  to that effect
     executed by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.5 Compliance with Law. There shall be no order, decree or ruling by
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

          10.6  Documents.   REI  shall  have  received  all  written  consents,
     assignments,  waivers,  authorizations  or  other  certificates  reasonably
     deemed  necessary by REI to provide for the  continuation in full force and
     effect of any and all  material  contracts  and  leases  of R-CUBE  and for
     R-CUBE to consummate the transactions  contemplated  hereby except when the
     failure to receive the consents,  etc.,  would not have a Material  Adverse
     Effect.

          10.7  Corporate  Opinion.  REI shall  have  received  the  opinion  of
     R-CUBE's   corporate   legal  counsel  based  upon   reasonably   requested
     certifications  as to factual  matters and dated the Closing Date regarding
     the status and authority of R-CUBE, the authorization of this Agreement and
     the transactions  contemplated  hereby by R-CUBE, and the binding effect of
     this Agreement on R-CUBE and Sellers.  The opinion shall be satisfactory to
     REI.

          10.8 Other Agreements. The closing of the Other Agreements shall occur
     simultaneously with the Closing of this Agreement.

      11. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI, R-CUBE AND SELLER.

          The  obligations of REI,  R-CUBE and Sellers  hereunder are subject to
     the fulfillment or  satisfaction  on or before the Closing,  of each of the
     following conditions (any one or more of which may be waived by REI, R-CUBE
     and Seller, but only in a writing signed by REI, R-CUBE and Seller).

          11.1 Government Consents.  There shall have been obtained on or before
     the Closing such material permits or  authorizations,  and there shall have
     been  taken  such  other  action,  as may be  required  to  consummate  the
     transactions  contemplated  by this Agreement by any  

                                       22

<PAGE>

     regulatory  authority having  jurisdiction over the parties and the actions
     herein  proposed to be taken,  including  but not  limited to  requirements
     under applicable federal and state securities laws.

          11.2 No Legal  Action.  No temporary  restraining  order,  preliminary
     injunction  or  permanent   injunction  or  other  order   preventing   the
     consummation  of the  transactions  contemplated  by this  Agreement or the
     Other  Agreements  shall have been issued by any federal or state court and
     remain in  effect,  nor  shall  any  proceeding  initiated  by the  federal
     government seeking any of the foregoing be pending.

      12. TERMINATION OF AGREEMENT.

          12.1  Termination.  This Agreement may be terminated at any time prior
     to the Closing:

               (1) by written agreement of R-CUBE, REI and Seller;

               (2) by R-CUBE  and  Seller,  if there has been a breach by REI of
          any representation,  warranty, covenant or agreement set forth in this
          Agreement  on the part of REI, or if any  representation  of REI shall
          have  become  untrue,  in either case which has or can  reasonably  be
          expected to have a Material Adverse Effect and which REI fails to cure
          prior to the Closing (except that no cure period shall be provided for
          a breach by REI which by its nature cannot be cured);

               (3) by REI, if there has been a breach by R-CUBE or Seller of any
          representation,  warranty,  covenant  or  agreement  set forth in this
          Agreement on the part of R-CUBE or Seller, or if any representation of
          R-CUBE or Seller shall have become untrue, in either case which has or
          can reasonably be expected to have a Material Adverse Effect and which
          R-CUBE or Seller  fails to cure prior to the Closing  (except  that no
          cure period  shall be provided  for a breach by R-CUBE or Seller which
          by its nature cannot be cured);

               (4) by R-CUBE, Seller or REI, if:

                    (i)...if all the  conditions for Closing shall not have been
               satisfied or waived on or before  February 28, 1999 other than as
               a result of a breach of this Agreement by the terminating  party;
               or

                    (ii)..if  a  permanent  injunction  or  other  order  by any
               federal or state  court  which  would make  illegal or  otherwise
               restrain  or  prohibit  the   consummation  of  the  transactions
               contemplated  by this Agreement  shall have been issued and shall
               have become final and nonappealable.

          12.2 Notice of  Termination.  Any  termination of this Agreement under
     Section 12.1 will be  effective  by the  delivery of written  notice of the
     terminating party to the other parties hereto.

                                       23
<PAGE>

          12.3 Effect of  Termination.  In the case of any  termination  of this
     Agreement  or the  Other  Agreements  as  provided  in  Section  12 of this
     Agreement or the Other  Agreements,  this Agreement  shall be of no further
     force and effect  (except as provided  in Section  14) and  nothing  herein
     shall relieve any party from  liability for any breach of this Agreement or
     the Other Agreements. In case of any termination as a result of a breach by
     a party or the  failure  of a party to  satisfy  Closing  conditions  to be
     satisfied by it and which are within its control, that party shall bear all
     of  the  expenses   (including,   without  limitation,   reasonable  legal,
     accounting  and other  advisory  fees) of the  other  parties  incurred  in
     connection with the failed transaction; provided, however, that in no event
     shall REI be responsible for payment of the fees and expenses  described in
     Section  2.15.  In all other  cases of  termination,  each  party  shall be
     responsible for its own expenses.

      13. NON-COMPETITION.

          13.1 Definitions. For purposes of this Section 13, the following terms
     shall have the following meanings:

               (1) "Customer  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Customer  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.3.

               (2) The term "Customers" shall mean, with respect to each Seller,
          any manager,  group or division  located in a specific  building that,
          during the year preceding the date of this  Agreement,  as of the date
          of this  Agreement,  during the period from the date of this Agreement
          to the Closing Date or during the Employee  Non-Solicitation Period or
          the Customer Non-Solicitation Period is or was a client or customer of
          R-CUBE.

               (3) The words  "directly  or  indirectly"  shall mean:  (i) being
          personally  involved in providing or seeking to provide services to an
          Employee,  Customer or Prospective Customer; (ii) participating in any
          person or  enterprise as an owner,  partner,  limited  partner,  joint
          venturer,  controlling  member or  controlling  shareholder;  or (iii)
          communicating  to any  such  person  or  enterprise  any  confidential
          information  of the business  conducted by R-CUBE  during the relevant
          period.

               (4)  "Employees"  shall  mean any  employee  of  R-CUBE as of, or
          immediately  prior to the date of this  Agreement,  during  the period
          from the date of this  Agreement  to the  Closing  Date or during  the
          Employee  Non-Solicitation  Period  or the  Customer  Non-Solicitation
          Period.

               (5) "Employee  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Employee  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.2.  Notwithstanding the foregoing sentence, with respect to
          the 

                                       24

<PAGE>

          employment of Mr.  Deepak  Suktbankar,  the Employee  Non-Solicitation
          Period shall be from the date of this Agreement  through and including
          the date that is 45 days after the Closing Date.

               (6) The term  "person"  shall  mean  any  natural  person,  firm,
          partnership,  association,  corporation,  company,  limited  liability
          company,  limited  partnership,  trust,  business trust,  Governmental
          Entity or other entity.

               (7) The term "Prospective Customer" shall mean any manager, group
          or division located in a specific  building that R-CUBE has contacted,
          or has  developed a strategy  or plan to  contact,  for the purpose of
          acquiring manager, group or division as a customer or client.

          13.2  Non-Solicitation  of  Employees.   Sellers  recognize  that  the
     Employees  are a  valuable  resource  of  R-CUBE.  Accordingly,  during the
     Employee  Non-Solicitation  Period,  no Seller  shall,  either  alone or in
     conjunction with any other person or entity, directly or indirectly go into
     business  with any  Employee or solicit,  induce or recruit any Employee to
     leave the employ of R-CUBE.

          13.3  Non-Solicitation of Customers.  Sellers recognize that customers
     are a  valuable  resource  of  R-CUBE.  Accordingly,  during  the  Employee
     Non-Solicitation  Period,  no Seller shall,  either alone or in conjunction
     with any other person or entity,  directly or indirectly  call on, solicit,
     take away, accept as a client,  customer or prospective client or customer,
     or attempt to call on, solicit, take away, accept as a client,  customer or
     prospective client or customer a Customer or Prospective Customer.

          13.4  Additional  Agreements.   Seller  hereby  expressly  agrees  and
     acknowledges that:

               (1) R-CUBE has protectable business interests with respect to its
          Employees,  Customers and Prospective Customers,  and that competition
          with and against such business interests would be harmful to R-CUBE;

               (2) the covenants  contained in this Section 13 are reasonable as
          to time and geographical area and do not place any unreasonable burden
          upon each Seller's ability to earn a livelihood;

               (3) the public will not be harmed as a result of  enforcement  of
          the covenants contained in this Section 13;

               (4) the personal  legal  counsel for each Seller has reviewed the
          covenants contained in this Section 13;

               (5) the parties have entered into the covenants  contained herein
          in connection with and as a condition precedent to the consummation of
          the  Agreement and the Other  Agreements,  pursuant to which REI shall
          acquire  R-CUBE;  the  agreements,  actions,  covenants,  and promises
          contained  herein  are  intended  to  protect  and ensure the value of
          R-CUBE, including its goodwill, which actions, covenants, and promises
          are a material  consideration to REI in connection 

                                       25

<PAGE>

          with this Agreement and the Other Agreements;  and, to the extent that
          the laws of any  jurisdiction  in which  this  Agreement  or the Other
          Agreements   shall  be   interpreted,   construed,   and/or   enforced
          distinguish  between  covenants given in connection with the sale of a
          business and its  goodwill  and  covenants  given in  connection  with
          employment,  this  covenant  will be given the broader  interpretation
          customarily  given  to  covenants  in  connection  with  the sale of a
          business and the transfer of goodwill to REI; and

               (6) each Seller understands and agrees to each and every term and
          condition  contained  Section  13 of  this  Agreement  and  the  Other
          Agreements.

          13.5 Remedies; Enforceability. Seller recognizes and acknowledges that
     irreparable damage will result to REI in the event of a breach by Seller or
     any of  Seller's  affiliates  of the  provisions  of this  Section 13, and,
     accordingly,  in the  event  of such a  breach,  REI will be  entitled,  in
     addition to any other legal or  equitable  damages and remedies to which it
     may be entitled or which may be available, to an injunction to restrain the
     violation thereof. If any provision of this Section 13 shall be adjudicated
     by a court of competent jurisdiction to be invalid or unenforceable because
     of the scope, duration, area of its applicability, or any other reason, the
     court making such  determination  will have the power to modify such scope,
     duration, or area, or all of them, or to strike an invalid or unenforceable
     provision, in whole or in part, to the extent necessary to make such scope,
     duration, area, or provision valid and enforceable.

      14. SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.

          All representations, warranties and covenants of the parties contained
     in this  Agreement  will  remain  operative  and in full force and  effect,
     regardless of any investigation made by or on behalf of the parties to this
     Agreement,  until the earlier of the  termination  of this Agreement or one
     year after the Closing Date, whereupon the representations,  warranties and
     covenants  will expire (except for  covenants,  such as those  contained in
     Sections  4.8,  5.4, 7 and 13,  that by their  terms  survive  for a longer
     period).

      15. MISCELLANEOUS.

          15.1  Governing  Law.  The  internal  laws of the State of  California
     (irrespective  of its choice of law principles) will govern the validity of
     this Agreement,  the construction of its terms and the  interpretation  and
     enforcement of the rights and duties of the parties hereto.

          15.2 Assignment;  Binding Upon Successors and Assigns. No party hereto
     may assign any of its rights or  obligations  hereunder  without  the prior
     written consent of the other parties hereto. This Agreement will be binding
     upon and inure to the  benefit of the parties  hereto and their  respective
     successors and permitted assigns.

          15.3  Severability.  If  any  provision  of  this  Agreement,  or  the
     application  thereof,  will for any  reason and to any extent be invalid or
     unenforceable,  the  remainder of this  Agreement and  application  of such
     provision  to other  persons or  circumstances  will be  interpreted  so as
     reasonably  to effect the  interest  of the  parties  hereto.  The  parties
     further  agree to  replace  such void or  unenforceable  provision  of this
     Agreement with a valid and enforceable  provision that will 

                                       26

<PAGE>

     achieve, to the greatest extent possible, the economic,  business and other
     purpose of the void unenforceable provision.

          15.4  Counterparts.  This  Agreement  may be executed in any number of
     counterparts, each of which will be deemed an original as regards any party
     whose  signature  appears thereon and all of which together will constitute
     one and the same instrument. This Agreement will become binding when one or
     more  counterparts  hereof,  individually or taken together,  will bear the
     signatures of all the parties reflected hereon as signatories.

          15.5 Other Remedies.  Except as otherwise provided herein, any and all
     remedies herein expressly  conferred upon a party will be deemed cumulative
     with and not  exclusive of any other remedy  conferred  hereby or by law on
     such  party,  and the  exercise  of any one remedy  will not  preclude  the
     exercise of any other.

          15.6  Amendment and Waivers.  Any term or provision of this  Agreement
     may be amended,  and the  observance  of any term of this  Agreement may be
     waived   (either   generally  or  in  a  particular   instance  and  either
     retroactively or prospectively) only by a writing signed by the party to be
     bound thereby. The waiver by a party of any breach hereof or default in the
     performance  hereof will not be deemed to  constitute a waiver of any other
     default or any succeeding breach or default.

          15.7  Expenses.  Except as provided in Section  12.3,  REI, on the one
     hand,  and  Sellers  and  R-CUBE,  on the  other,  will each bear their own
     expenses and legal fees  incurred  with respect to this  Agreement  and the
     transactions contemplated hereby.

          15.8 Attorneys'  Fees.  Should suit be brought to enforce or interpret
     any part of this  Agreement,  the  prevailing  party  will be  entitled  to
     recover, as an element of the costs of suit and not as damages,  reasonable
     attorneys' fees to be fixed by the court  (including,  without  limitation,
     costs, expenses and fees on any appeal).

          15.9 Notices.  All notices and other  communications  pursuant to this
     Agreement shall be in writing and deemed to be sufficient if contained in a
     written  instrument  and shall be  deemed  given if  delivered  personally,
     telecopied,  sent by  nationally-recognized  overnight courier or mailed by
     registered or certified mail (return receipt  requested),  postage prepaid,
     to the parties at the following  address (at such other address for a party
     as shall be specified by like notice):

<TABLE>
            <C>                     <S>        
            If to R-CUBE to:........R-CUBE Technologies, Inc.
                                    20410 Town Center Lane, #160
                                    Cupertino, California  95014
                                    Attention: Chief Executive Officer
                                    Telecopier: (408) 255-2042
</TABLE>

                                       27
<PAGE>
<TABLE>
            <C>                     <S>          
            With a copy to:.........Gray Cary Ware & Friedenrich LLP
                                    4365 Executive Drive, Suite 1600
                                    San Diego, California 92121-2189
                                    Attention: Christopher M. Smith, Esq.
                                    Telecopier: (619) 677-1477

            If to REI to:...........Research Engineers, Inc.
                                    22700 Savi Ranch Parkway
                                    Yorba Linda, California 92887
                                    Attention: Chief Executive Officer
                                    Telecopier: (714) 974-4771

            With a copy to:.........Rutan & Tucker, LP
                                    611 Anton, Suite 1400
                                    Costa Mesa, California 92626
                                    Attention: Cristy G. Lomenzo, Esq.
                                    Telecopier: (714) 546-9035

            If to Sellers to:.......Krishna P. Reddy
                                    10626 Flora Vista
                                    Cupertino, California 95014
</TABLE>

          All  notices  and  other  communications  shall be deemed to have been
     received (a) in the case of personal delivery, on the date of delivery, (b)
     in the case of a  telecopy,  when the party  receiving  the copy shall have
     confirmed  receipt of the  communication,  (c) in the case of  delivery  by
     nationally-recognized  overnight  courier,  on the business  day  following
     dispatch,  and (d) in the  case  of  mailing,  on the  third  business  day
     following such mailing.

          15.10 Construction of Agreement. This Agreement has been negotiated by
     the respective  parties hereto and their  attorneys and the language hereof
     will not be construed for or against either party. A reference to a Section
     or an Exhibit will mean a Section in, or Exhibit to, this Agreement  unless
     otherwise  explicitly  set forth.  The titles and  headings  herein are for
     reference  purposes only and will not in any manner limit the  construction
     of this Agreement which will be considered as a whole.

          15.11 No Joint  Venture.  Nothing  contained in this Agreement will be
     deemed or construed as creating a joint venture or partnership  between any
     of the parties to this  Agreement.  No party is by virtue of this Agreement
     authorized  as an  agent,  employee  or legal  representative  of any other
     party.  No  party  will  have the  power  to  control  the  activities  and
     operations  of any other.  The status of the parties  hereto is, and at all
     times will continue to be, that of independent  contractors with respect to
     each other. No party will have any power or authority to bind or commit any
     other.   No  party  will  hold  itself  out  as  having  any  authority  or
     relationship in contravention of this Section.

          15.12 Further  Assurances.  Each party agrees to cooperate  fully with
     the other  parties and to execute such further  instruments,  documents and
     agreements and to give such further written assurances as may be reasonably
     requested  by any other  party to evidence  and  reflect  the  

                                       28

<PAGE>

     transactions  described  herein and  contemplated  hereby and to carry into
     effect the intents and purposes of this Agreement.

          15.13 Absence of Third Party Rights.  No provisions of this  Agreement
     are intended, nor will be interpreted, to provide or create any third party
     beneficiary rights or any other rights of any kind in any client, customer,
     affiliate,  shareholder  or partner of any party hereto or any other person
     or entity unless specifically  provided otherwise herein, and, except as so
     provided, all provisions hereof will be personal solely between the parties
     to this Agreement.

          15.14 Entire Agreement.  This Agreement and the schedules and exhibits
     hereto  constitute  the entire  understanding  and agreement of the parties
     hereto with respect to the subject  matter  hereof and  supersede all prior
     and   contemporaneous   agreements  or   understandings,   inducements   or
     conditions,  express or implied,  written or oral, between the parties with
     respect  hereto.  The express terms hereof control and supersede any course
     of performance or usage of trade inconsistent with any of the terms hereof.

                                       29
<PAGE>




      IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  or caused this
Agreement to be executed by their duly authorized  respective officers as of the
date first above written.

REI:                                RESEARCH ENGINEERS, INC.,
                                    a Delaware corporation

                                    By: /S/ AMRIT K. DAS
                                    --------------------
                                    Amrit K. Das, President

                                    By: /S/ WAYNE L. BLAIR
                                    ----------------------
                                    Wayne L. Blair, Secretary

R-CUBE:                             R-CUBE TECHNOLOGIES, INC.,
                                    a California corporation

                                    By: /S/ KRISHNA P. REDDY
                                    ------------------------
                                    Krishna P. Reddy, President

                                    By: /S/ SRINIVASA REDDY MALIREDDY
                                    ---------------------------------
                                    Srinivasa Reddy Malireddy,
                                    Secretary

SELLER:                             /S/ KRISHNA P. REDDY
                                    --------------------
                                    KRISHNA P. REDDY, an individual


I, THE  SPOUSE OF  SELLER,  HAVE  EXECUTED  THIS  AGREEMENT  FOR THE  PURPOSE OF
CONFIRMING MY CONSENT TO THE CONVEYANCE OF MY COMMUNITY  PROPERTY  INTEREST,  IF
ANY, IN SHARES OF CAPITAL STOCK OF R-CUBE PURSUANT TO THIS AGREEMENT

                /S/ ANURADHA PADALA
                -------------------
                Print Name: Anuradha Padala


                                       30


<PAGE>



                                                                     Exhibit 2.2








                            STOCK PURCHASE AGREEMENT

                                      AMONG

                            RESEARCH ENGINEERS, INC.

                            R-CUBE TECHNOLOGIES, INC.

                                       AND

                                PRAKASH RAO POKALA


                                   DATED AS OF

                                JANUARY 18, 1999


<PAGE>
<TABLE>
<CAPTION>
                                       
                                TABLE OF CONTENTS

      DESCRIPTION                                                      PAGE NO.
      -----------                                                      --------
      <S>                                                                   <C>

      1.    PURCHASE AND SALE OF SHARES......................................1
            1.1   Purchase and Sale. ........................................1
            1.2   Purchase Price. ...........................................1
            1.3   Adjustment to Purchase Price. .............................1
            1.4   Payment of Purchase Price. ................................1
            1.5   Review of Final Balance Sheet. ............................2

      2.    REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.............2
            2.1   Organization; Good Standing; Qualification and Power. .....2
            2.2   Capital Structure..........................................3
                  2.2.1 Stock. ..............................................3
                  2.2.2 No Other Commitments. ...............................3
            2.3   Authority..................................................3
                  2.3.1 Corporate Action. ...................................3
                  2.3.2 Sellers' Authority. .................................3
                  2.3.3 No Conflict. ........................................3
                  2.3.4 Governmental Consents. ..............................4
            2.4   Financial Statements. .....................................4
            2.5   Compliance with Applicable Laws. ..........................4
            2.6   Insurance. ................................................4
            2.7   Litigation. ...............................................5
            2.8   Employee Benefits..........................................5
            2.9   Absence of Undisclosed Liabilities. .......................6
            2.10  Absence of Certain Changes or Events. .....................6
            2.11  No Defaults. ..............................................7
            2.12  Certain Agreements. .......................................7
            2.13  Taxes......................................................8
            2.14  Intellectual Property. ...................................10
            2.15  Fees and Expenses. .......................................10
            2.16  Environmental Matters.....................................10
            2.17  [Intentionally Omitted]. .................................10
            2.18  Disclosure. ..............................................10
            2.19  Restrictions on Business Activities. .....................10
            2.20  Accounts Receivable.......................................10
            2.21  Personal Property. .......................................11
            2.22  Real Property. ...........................................11
            2.23  Warranties. ..............................................11
            2.24  Contracts. ...............................................11
            2.25  No Goods or Products. ....................................11
</TABLE>
                                       i
<PAGE>
<TABLE>

      <S>                                                                   <C>
      3.    REPRESENTATIONS AND WARRANTIES OF REI...........................11
            3.1   Organization; Good Standing; Qualification and Power. ....11
            3.2   Capital Structure.........................................12
                  3.2.1 Stock, Options and Warrants. .......................12
                  3.2.2 No Other Commitments. ..............................12
            3.3   Authority.................................................12
                  3.3.1 Corporate Action. ..................................12
                  3.3.2 No Conflict. .......................................12
                  3.3.3 Governmental Consents. .............................13
            3.4   SEC Documents.............................................13
                  3.4.1 SEC Reports. .......................................13
                  3.4.2 Financial Statements. ..............................13
            3.5   Litigation. ..............................................13
            3.6   Fees and Expenses. .......................................14
            3.7   Disclosure. ..............................................14
            3.8   Financial Capacity........................................14

      4.    R-CUBE AND SELLERS' COVENANTS...................................14
            4.1   Notification of Changes. .................................14
            4.2   Maintenance of Business. .................................14
            4.3   Conduct of Business. .....................................14
            4.4   Regulatory Approvals. ....................................16
            4.5   Necessary Consents. ......................................16
            4.6   Access to Information. ...................................16
            4.7   Satisfaction of Conditions Precedent. ....................17
            4.8   Confidentiality. .........................................17
            4.9   Cooperation in Review of R-CUBE Financial Statements. ....17

      5.    REI COVENANTS...................................................17
            5.1   Regulatory Approvals. ....................................17
            5.2   Necessary Consents. ......................................17
            5.3   Satisfaction of Conditions Precedent. ....................17
            5.4   Confidentiality. .........................................18

      6.    EMPLOYEE MATTERS................................................18

      7.    INDEMNIFICATION OF THE PARTIES..................................18
            7.1   Indemnification by Sellers................................18
            7.2   Indemnification by REI....................................19
            7.3   Manner of Indemnification. ...............................19
</TABLE>
                                       ii

<PAGE>
<TABLE>

      <S>                                                                   <C>
      8.    CLOSING.........................................................19
            8.1   Closing Date. ............................................19
            8.2   Deliveries by R-CUBE and Sellers at the Closing. .........19
            8.3   Delivery by REI at the Closing. ..........................20

      9.    CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE
            AND SELLER......................................................20
            9.1   Accuracy of Representations and Warranties. ..............20
            9.2   Covenants. ...............................................20
            9.3   Compliance with Law. .....................................20

      10.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI......................20
            10.1  Accuracy of Representations and Warranties. ..............21
            10.2  Covenants. ...............................................21
            10.3  Completion of Due Diligence...............................21
            10.4  Absence of Material Adverse Change. ......................21
            10.5  Compliance with Law. .....................................21
            10.6  Documents. ...............................................21
            10.7  Corporate Opinion. .......................................22
            10.8  Other Agreements..........................................22

      11.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI,
            R-CUBE AND SELLER...............................................22
            11.1  Government Consents. .....................................22
            11.2  No Legal Action. .........................................22

      12.   TERMINATION OF AGREEMENT........................................22
            12.1  Termination. .............................................22
            12.2  Notice of Termination. ...................................23
            12.3  Effect of Termination. ...................................23

      13.   NON-COMPETITION.................................................23
            13.1  Definitions...............................................23
            13.2  Non-Solicitation of Employees. ...........................24
            13.3  Non-Solicitation of Customers. ...........................24
            13.4  Additional Agreements.....................................25
            13.5  Remedies; Enforceability..................................25

      14.   SURVIVAL OF REPRESENTATIONS, WARRANTIES
            AND COVENANTS...................................................26

      15.   MISCELLANEOUS...................................................26
            15.1  Governing Law. ...........................................26
            15.2  Assignment; Binding Upon Successors and Assigns. .........26
            15.3  Severability. ............................................26
            15.4  Counterparts. ............................................26
</TABLE>
                                      iii.
<PAGE>
<TABLE>

      <S>                                                                   <C>
            15.5  Other Remedies. ..........................................26
            15.6  Amendment and Waivers. ...................................26
            15.7  Expenses. ................................................27
            15.8  Attorneys' Fees. .........................................27
            15.9  Notices. .................................................27
            15.10 Construction of Agreement. ...............................28
            15.11 No Joint Venture. ........................................28
            15.12 Further Assurances. ......................................28
            15.13 Absence of Third Party Rights. ...........................28
            15.14 Entire Agreement. ........................................28
</TABLE>
                                      iv.
<PAGE>
 

                            STOCK PURCHASE AGREEMENT


      THIS STOCK  PURCHASE  AGREEMENT  ("Agreement")  is entered into as of this
18th  day  of  January,  1999,  among  Research  Engineers,   Inc.,  a  Delaware
corporation  ("REI"),  R-CUBE  Technologies,   Inc.,  a  California  corporation
("R-CUBE"), and Prakash Rao Pokala, an individual ("Seller").

                                    RECITALS

      A.  Krishna P. Reddy,  an individual,  and Srinivasa Reddy Malireddy,  an
individual  (collectively,  the  "Other  Sellers,"  and  together  with  Seller,
"Sellers"), own, in the aggregate, all of the issued and outstanding shares (the
"Shares") of capital stock of R-CUBE.

      B. Seller owns 1,100,000 of the Outstanding Shares ("Seller's Shares").

      C. REI desires to purchase  from  Sellers,  and Sellers  desire to sell to
REI,  the  Outstanding  Shares  on the terms  and  conditions  set forth in this
Agreement and in similar Stock Purchase  Agreements (the "Other  Agreements") to
be negotiated  and entered into between REI and the Other Sellers as of the date
of this Agreement.

                                    AGREEMENT

      NOW, THEREFORE, the parties to this Agreement agree as follows:

      1.  PURCHASE AND SALE OF SHARES.

          1.1 Purchase and Sale.  Subject to the terms and  conditions set forth
     herein,  at the  Closing  (as  defined  in Section 8 below),  Seller  shall
     transfer,  convey, assign and deliver Seller's Shares to REI, and REI shall
     acquire, purchase and accept Seller's Shares from Seller.

          1.2  Purchase  Price.  Subject  to  the  adjustments  to  be  made  in
     accordance  with the  provisions  of Sections 1.3 through 1.5, the purchase
     price for Seller's Shares is $1,066,272 (the "Purchase Price").

          1.3 Adjustment to Purchase Price. The Purchase Price shall be adjusted
     upward by 45.96% of the amount,  if any, that the  shareholders'  equity of
     R-CUBE ("Final  Shareholders'  Equity") as shown on R-CUBE's  balance sheet
     ("Final  Balance  Sheet") to be prepared by R-CUBE's  accountants as at the
     Closing Date  (defined in Section 8.1) and  delivered to REI at the Closing
     exceeds $500,000.

          1.4 Payment of Purchase Price. The Purchase Price shall be paid by REI
     to Seller as follows:

              (1) At the Closing,REI shall pay to Seller the Purchase Price; and

                                       1

<PAGE>


              (2)  Subject to  Section  1.5,  within 30 days after the  Closing
          Date,  REI  shall  pay to  Seller  in cash the  amount  of any  upward
          adjustment to the Purchase Price made pursuant to Section 1.3.

          1.5 Review of Final Balance Sheet. REI and its  representatives  shall
     have 15 days to review  the Final  Balance  Sheet.  If REI  disagrees  with
     R-CUBE's calculation of the Final Shareholders' Equity, REI shall within 15
     days  after  the  Closing  Date give  written  notice  to  Sellers  of such
     disagreement  specifying in  reasonable  detail,  insofar as possible,  the
     nature and extent of the  disagreement.  If REI and  Sellers  are unable to
     resolve  any such  disagreement  within 15 days  after  REI  gives  Sellers
     notice, the disagreement  shall be referred for final  determination to any
     accounting firm of national  reputation as may be reasonably  acceptable to
     REI and  Sellers.  REI and  Sellers may submit to the  accounting  firm any
     facts that they deem relevant to the  determination,  and the determination
     of the accounting firm shall be conclusive, non-appealable and binding upon
     REI  and  Sellers  for  all  purposes.   Any  necessary  upward  adjustment
     determined  by the  accounting  firm shall be payable in cash by REI within
     three  days  after REI has been  notified  of such  determination.  REI and
     Sellers agree that the  procedures  established by Sections 1.2 through 1.5
     shall constitute the exclusive procedures for determining the consideration
     to be paid by REI to Sellers for the  Shares.  Costs  incurred  pursuant to
     this Section 1.5 shall be borne equally by REI and Sellers.

     2.   REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.

          Except as set forth in a schedule  dated the date of this  Agreement
and  delivered by R-CUBE and Seller to REI  concurrently  herewith  ("Disclosure
Schedule") specifically  identifying the Section of this Agreement requiring the
delivery of such  disclosure,  R-CUBE and Seller represent and warrant to REI as
set forth below. In this Agreement, any reference to any event, change or effect
being  "material"  with  respect  to any entity or group of  entities  means any
material  event,  change  or  effect  related  to the  condition  (financial  or
otherwise), properties, assets, liabilities,  businesses, operations, results of
operations or prospects of such entity or group of entities taken as a whole. In
this  Agreement,  the term "Material  Adverse  Effect" used in connection with a
party or any of that party's subsidiaries means any event, change or effect that
is materially  adverse to the condition  (financial or  otherwise),  properties,
assets, liabilities,  businesses, operations, results of operations or prospects
of that party and its subsidiaries,  taken as a whole; provided, however, that a
Material Adverse Effect shall not include: (a) any adverse effect resulting from
conditions  affecting the engineering software industry as a whole or the United
States economy as a whole; (b) a failure by R-CUBE to meet internal  earnings or
revenue projections; or (c) any disruption of customer or supplier relationships
arising primarily out of or resulting primarily from actions contemplated by the
parties  in  connection  with,  or  which  is  primarily   attributable  to  the
announcement of this Agreement and the transactions  contemplated hereby, to the
extent attributable thereto.

          2.1 Organization; Good Standing;  Qualification and Power. R-CUBE is a
     corporation duly organized, validly existing and in good standing under the
     laws of the jurisdiction of its incorporation,  has all requisite corporate
     power and authority to own,  lease and operate its  properties and to carry
     on its business as now being  conducted,  and is duly qualified and in good
     standing  to do business  in each  jurisdiction  in which the nature of its
     business or the ownership or leasing of its properties makes  qualification
     necessary,  other than in jurisdictions  where the failure to qualify would
     not have a  Material  Adverse  Effect.  R-CUBE  does not own,  directly  or
     indirectly,  

                                       2
<PAGE>
 
     shares of capital stock of any other  corporation or any equity interest in
     any other entity,  nor does R-CUBE  control,  directly or  indirectly,  any
     other corporation,  association or business  organization.  R-CUBE has made
     available to REI or its counsel complete and correct copies of the articles
     of incorporation  and bylaws of R-CUBE, in each case as amended to the date
     of this  Agreement,  and copies of all minutes of  meetings  and actions by
     written consent of shareholders, directors and board committees of R-CUBE.

          2.2 Capital Structure.

               2.2.1 Stock.  The authorized  capital stock of R-CUBE consists of
          10,000,000  shares of common  stock,  no par value per share  ("R-CUBE
          Common Stock"). As of the date of this Agreement,  3,300,000 shares of
          R-CUBE Common Stock are issued and outstanding. All outstanding shares
          of the  capital  stock of R-CUBE are  validly  issued,  fully paid and
          nonassessable,  are not subject to preemptive  rights and are owned by
          Sellers  free and clear of any  liens,  security  interests,  pledges,
          agreements, claims, charges or encumbrances.
      
               2.2.2 No  Other  Commitments.  There  are no  options,  warrants,
          calls,  rights,  commitments,  conversion  rights or agreements of any
          character  to which  R-CUBE  is a party or by  which  R-CUBE  is bound
          obligating  R-CUBE to issue,  deliver or sell,  or cause to be issued,
          delivered or sold, any shares of capital stock of R-CUBE or securities
          convertible  into or  exchangeable  for  shares  of  capital  stock of
          R-CUBE,  or  obligating  R-CUBE  to grant,  extend  or enter  into any
          option,  warrant,  call,  right,   commitment,   conversion  right  or
          agreement.   There  are  no  voting  trusts  or  other  agreements  or
          understandings  to which  R-CUBE or any Seller is a party with respect
          to the voting of the capital stock of R-CUBE.

          2.3 Authority.

               2.3.1 Corporate Action.  R-CUBE has all requisite corporate power
          and  authority  to  enter  into  this  Agreement  and to  perform  its
          obligations hereunder and to consummate the transactions  contemplated
          by this  Agreement.  The execution  and delivery of this  Agreement by
          R-CUBE and the consummation by R-CUBE of the transactions contemplated
          hereby have been duly authorized by all necessary  corporate action on
          the  part of  R-CUBE.  This  Agreement  has  been  duly  executed  and
          delivered  by  R-CUBE,  and this  Agreement  is the valid and  binding
          obligation of R-CUBE, enforceable in accordance with its terms, except
          that such enforceability may be subject to (i) bankruptcy, insolvency,
          reorganization   or  other  similar  laws  affecting  or  relating  to
          enforcement of creditors'  rights generally and (ii) general equitable
          principles.

               2.3.2  Sellers'  Authority.  Each of  Sellers  has full power and
          capacity to enter into this Agreement and the Other  Agreements.  This
          Agreement  and the  Other  Agreements  have  been  duly  executed  and
          delivered by Sellers and this  Agreement  and the Other  Agreement are
          the valid and binding obligation of Sellers, enforceable in accordance
          with their  terms,  except that  enforceability  may be subject to (i)
          bankruptcy, insolvency, reorganization or other similar laws affecting
          or relating to  enforcement  of creditors'  rights  generally and (ii)
          general equitable principles.

               2.3.3  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions contemplated hereby nor compliance with the

                                       3
 

<PAGE>

          provisions  hereof will conflict with, or result in any violations of,
          or cause a default (with or without  notice or lapse of time, or both)
          under, or give rise to a right of termination, amendment, cancellation
          or  acceleration  of any  obligation  contained in, or the loss of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of R-CUBE under, any term, condition or provision
          of (x) the  articles of  incorporation  or bylaws of R-CUBE or (y) any
          loan or credit agreement,  note, bond, mortgage,  indenture,  lease or
          other material  agreement,  judgment,  order,  decree,  statute,  law,
          ordinance,  rule or regulation  applicable to R-CUBE or its properties
          or  assets,  other  than any  such  conflicts,  violations,  defaults,
          losses,  liens,  security  interests,  charges, or encumbrances which,
          individually  or in the aggregate,  would not have a Material  Adverse
          Effect.

               2.3.4  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          court,  administrative  agency  or  commission  or other  governmental
          authority   or   instrumentality,   domestic   or   foreign   (each  a
          "Governmental  Entity"),  is  required  to be  obtained  by  R-CUBE in
          connection  with the execution  and delivery of this  Agreement or the
          consummation of the transactions contemplated hereby.

          2.4 Financial  Statements.  R-CUBE has furnished to REI copies of: (a)
     the unaudited balance sheets of R-CUBE at December 31, 1996, 1997 and 1998,
     and the related  statements of income for the periods then ended.  Prior to
     the Closing, R-CUBE shall furnish to REI copies of R-CUBE's audited balance
     sheet at  December  31, 1998 and the  related  statement  of income for the
     period then ended. All financial statements referred to in this Section 2.4
     ("R-CUBE Financial  Statements") are or will be complete and correct,  have
     been prepared in accordance with generally accepted  accounting  principles
     applied on a consistent  basis during the  respective  periods,  and fairly
     present or will fairly present the financial  condition of R-CUBE as at the
     respective  dates  thereof and the results of  operation  of R-CUBE for the
     respective  periods  covered  by the  statements  of  income  contained  in
     therein.  R-CUBE does not have any  material  obligations  or  liabilities,
     contingent  or  otherwise,  not fully  disclosed  by the  R-CUBE  Financial
     Statements.

          2.5  Compliance  with  Applicable  Laws. The business of R-CUBE is not
     being  conducted in violation of any law,  ordinance,  regulation,  rule or
     order of any Governmental  Entity where the violation would have a Material
     Adverse  Effect.  R-CUBE has not been notified by any  Governmental  Entity
     that any  investigation  or review  with  respect  to R-CUBE is  pending or
     threatened,  nor  has  any  Governmental  Entity  notified  R-CUBE  of  its
     intention to conduct an  investigation  or review.  R-CUBE has all permits,
     licenses and franchises from Governmental  Entities required to conduct its
     business as now being  conducted,  except for those whose absence would not
     have a Material Adverse Effect.

          2.6 Insurance. R-CUBE maintains and at all times since January 1, 1997
     has  maintained  general  liability  insurance  that R-CUBE  believes to be
     reasonably  prudent for its business.  The Disclosure  Schedule  contains a
     complete and correct list of all insurance  policies  maintained by R-CUBE.
     R-CUBE has delivered or made  available to REI complete and correct  copies
     of all such  policies,  together  with all riders and  amendments  thereto.
     These  policies are in full force and effect,  and all premiums due thereon
     have been paid. R-CUBE has complied in all material respects with the terms
     and provisions of the policies.  In the opinion of R-CUBE reasonably formed

                                       4

<PAGE>

     and held,  there is no reasonable basis on which a claim should or could be
     made under any such policy.

          2.7 Litigation.  There is no suit, action, arbitration,  demand, claim
     or  proceeding  pending or, to the best  knowledge  of R-CUBE and  Sellers,
     threatened against R-CUBE, nor is there any judgment,  decree,  injunction,
     rule or order of any Governmental Entity or arbitrator  outstanding against
     R-CUBE that, individually or in the aggregate, could reasonably be expected
     to have a Material Adverse Effect.  R-CUBE has made available to REI or its
     counsel correct and complete copies of all  correspondence  prepared by its
     counsel for R-CUBE's  accountants in connection with the last two completed
     reviews of R-CUBE's financial  statements and any correspondence  since the
     date of the last review.

          2.8 Employee Benefits.

               (1) R-CUBE has made  available to REI a list of all  employees of
          R-CUBE and their salaries as of the date of this Agreement. R-CUBE has
          made available to REI copies or  descriptions of all written or formal
          plans or  agreements  involving  direct or  indirect  compensation  or
          benefits  (including  any employment  agreements  entered into between
          R-CUBE  and  any   employee   of  R-CUBE,   but   excluding   workers'
          compensation,  unemployment compensation and other government-mandated
          programs)  currently  or  previously  maintained,  contributed  to  or
          entered  into by R-CUBE  under which  R-CUBE has any present or future
          obligation  or  liability  (collectively,  "R-CUBE  Employee  Plans").
          Copies of all R-CUBE Employee Plans (and, if applicable, related trust
          agreements)  and all  amendments  thereto and written  interpretations
          thereof (including summary plan descriptions) have been made available
          to REI or its  counsel.  No  contributions  are due or past  due  from
          R-CUBE with respect to any of the R-CUBE  Employee  Plans. To R-CUBE's
          and Sellers'  knowledge,  each of the R-CUBE  Employee  Plans has been
          maintained  in  compliance  with its terms  and with the  requirements
          prescribed by any and all statutes, orders, rules and regulations that
          are applicable to the R-CUBE  Employee Plans except for  noncompliance
          which would not have a Material Adverse Effect.

               (2) R-CUBE has made  available to REI a list of each  employment,
          severance or other similar  contract,  arrangement  or policy and each
          plan or arrangement  providing for insurance  coverage  (including any
          self-insured  arrangements),  workers'  benefits,  vacation  benefits,
          severance    benefits,    disability    benefits,    death   benefits,
          hospitalization benefits,  retirement benefits, deferred compensation,
          profit-sharing, bonuses, stock options, stock purchase, phantom stock,
          stock  appreciation  or  other  forms  of  incentive  compensation  or
          post-retirement  insurance,  compensation  or benefits for  employees,
          consultants or directors  which (i) is not one of the R-CUBE  Employee
          Plans, (ii) is entered into, maintained or contributed to, as the case
          may be, by R-CUBE and (iii) covers any employee or former  employee of
          R-CUBE.  The  contracts,  plans  and  arrangements  described  in this
          paragraph  2.8(d) are referred to  collectively as the "R-CUBE Benefit
          Arrangements." To R-CUBE's and Sellers' knowledge,  each of the R-CUBE
          Benefit  Arrangements  has been  maintained in substantial  compliance
          with its terms  and with the  requirements  prescribed  by any and all
          statutes, orders, rules and regulations which are applicable to R-CUBE
          Benefit Arrangements.  R-CUBE has made available to REI or its counsel
          a  complete  and  correct  copy or  description  of each of the R-CUBE
          Benefit Arrangements.

                                       5

<PAGE>


               (3) There has been no amendment  to,  written  interpretation  or
          announcement   by  R-CUBE   relating   to,   or  change  in   employee
          participation  or coverage under,  any of the R-CUBE Employee Plans or
          R-CUBE Benefit Arrangements that would increase materially the expense
          of   maintaining   the  R-CUBE   Employee   Plans  or  R-CUBE  Benefit
          Arrangements  above  the  level of the  expense  incurred  in  respect
          thereof for the fiscal year ended December 31, 1998.

               (4) To R-CUBE's and Sellers'  knowledge,  R-CUBE is in compliance
          in all material  respects with all  applicable  laws,  agreements  and
          contracts relating to employment,  employment practices, wages, hours,
          and terms and conditions of employment.

          2.9 Absence of  Undisclosed  Liabilities.  Except as  disclosed on the
     Disclosure  Schedule,  at December  31,  1998 (the  "R-CUBE  Balance  Sheet
     Date"), (i) R-CUBE had no liabilities or obligations of any nature (matured
     or unmatured,  fixed or contingent) which were material to R-CUBE, taken as
     a whole,  and were not  provided  for in the  unaudited  December  31, 1998
     balance  sheet  (the  "R-CUBE  Balance  Sheet"),  a copy of which  has been
     delivered to REI; and (ii) all reserves established by R-CUBE and set forth
     in the R-CUBE Balance Sheet were reasonably adequate.

          2.10 Absence of Certain  Changes or Events.  Since the R-CUBE  Balance
     Sheet Date there has not occurred:

               (1)  any  change  in  the  condition  (financial  or  otherwise),
          properties,  assets, liabilities,  businesses,  operations, results of
          operations  or  prospects  of  R-CUBE  taken  as a  whole  that  could
          reasonably constitute a Material Adverse Effect; 

               (2) any amendments or changes in the articles of incorporation or
          bylaws of R-CUBE;

               (3) any damage, destruction or loss, whether covered by insurance
          or not, that could reasonably constitute a Material Adverse Effect;

               (4) any redemption,  repurchase or other acquisition of shares of
          R-CUBE  Common Stock by R-CUBE  (other than  pursuant to  arrangements
          with terminated employees or consultants), or any declaration, setting
          aside or payment of any  dividend  or other  distribution  (whether in
          cash, stock or property) with respect to R-CUBE Common Stock;

               (5) any material  increase in or modification of the compensation
          or  benefits  payable  or to  become  payable  by R-CUBE to any of its
          directors  or  employees,  except in the  ordinary  course of business
          consistent with past practice;

               (6)  any  material  increase  in or  modification  of any  bonus,
          pension,  insurance  or any of the  R-CUBE  Employee  Plans or  R-CUBE
          Benefit Arrangements  (including,  but not limited to, the granting of
          stock options,  restricted stock awards or stock appreciation  rights)
          made to, for or with any of its employees,  other than in the ordinary
          course of business consistent with past practice;

                                       6
<PAGE>
 
              (7) any  acquisition or sale of a material  amount of property or
          assets of  R-CUBE,  other  than in the  ordinary  course  of  business
          consistent with past practices;

               (8) any  alteration  in any term of any  outstanding  security of
          R-CUBE;

               (9) any (A) incurrence,  assumption or guarantee by R-CUBE of any
          debt  for  borrowed  money;  (B)  issuance  or sale of any  securities
          convertible into or exchangeable for debt securities of R-CUBE; or (C)
          issuance or sale of options or other  rights to acquire  from  R-CUBE,
          directly or  indirectly,  debt  securities of R-CUBE or any securities
          convertible into or exchangeable for any such debt securities;

               (10) any  creation  or  assumption  by  R-CUBE  of any  mortgage,
          pledge, security interest or lien or other encumbrance on any asset;

               (11) any making of any loan,  advance or capital  contribution to
          or  investment  in any person  other than (i) travel loans or advances
          made in the  ordinary  course of business of R-CUBE,  (ii) other loans
          and  advances in an  aggregate  amount  which does not exceed  $25,000
          outstanding  at any time and  (iii)  purchases  on the open  market of
          liquid, publicly traded securities;

               (12) any entering into, amendment of, relinquishment, termination
          or  non-renewal  by  R-CUBE  of  any  contract,   lease   transaction,
          commitment  or other right or  obligation  other than in the  ordinary
          course of business;

               (13) any  transfer  or grant of an R-CUBE  intellectual  property
          right,  other than those transferred or granted in the ordinary course
          of business;

               (14) any labor dispute or charge of unfair labor practice  (other
          than  routine  individual  grievances)  or,  to  R-CUBE  and  Sellers'
          knowledge,   any   activity  or   proceeding   by  a  labor  union  or
          representative  thereof to  organize  any  employees  of R-CUBE or any
          campaign being conducted to solicit authorization from employees to be
          represented by the labor union; or
             
               (15) any  agreement  or  arrangement  made by  R-CUBE to take any
          action which,  if taken prior to the date hereof,  would have made any
          representation  or  warranty  set  forth in this  Agreement  untrue or
          incorrect unless otherwise disclosed.

          2.11 No Defaults.  R-CUBE is not in default under, and there exists no
     event,  condition or  occurrence  which,  after notice or lapse of time, or
     both, would constitute a default by R-CUBE under, any contract or agreement
     to which R-CUBE is a party and which would, if terminated or modified, have
     a Material Adverse Effect.

          2.12 Certain  Agreements.  Neither the  execution and delivery of this
     Agreement nor the consummation of the transactions contemplated hereby will
     (i)  result  in any  payment  (including,  without  limitation,  severance,
     unemployment  compensation,  golden parachute, bonus or otherwise) becoming
     due to any  director or employee  of R-CUBE from  R-CUBE,  under any of the
     R-CUBE  Employee  Plans,  R-CUBE Benefit  Arrangements  or otherwise,  (ii)
     materially  increase 
                                       7


<PAGE>

     any benefits  otherwise payable under any of the R-CUBE Employee Plans, the
     R-CUBE   Benefit   Arrangements   or  otherwise  or  (iii)  result  in  the
     acceleration of the time of payment or vesting of any benefits.

          2.13 Taxes.

               (1) For purposes of this Agreement, "Tax" or collectively "Taxes"
          means any and all federal, state, local and foreign taxes, assessments
          and other governmental charges,  duties,  impositions and liabilities,
          including  taxes  based upon or measured  by gross  receipts,  income,
          profits,  sales,  use and  occupation,  and value  added,  ad valorem,
          transfer,  franchise,  withholding,  payroll,  recapture,  employment,
          estimated,  excise and property  taxes,  together  with all  interest,
          penalties and additions  imposed with respect to those amounts and any
          obligations under any agreements or arrangements with any other person
          with respect to those amounts and including any liability for taxes of
          a predecessor entity.

               (2) Except as set forth in the Disclosure  Schedule:  

                         (i)   As of the Closing,  R-CUBE will have prepared and
                    filed  all  required  federal,  state,  local,  and  foreign
                    returns,  estimates,  information  statements,  and  reports
                    relating  to any and all  Taxes  ("Returns")  concerning  or
                    attributable  to R-CUBE that are  required to be filed by or
                    with respect to R-CUBE on or prior to the Closing,  and each
                    of the  Returns  shall be, to the  knowledge  of R-CUBE  and
                    Sellers,   true,  correct,  and  complete  in  all  material
                    respects and shall have been  completed in  accordance  with
                    applicable law;  

                         (ii)  As of the Closing,  R-CUBE: (A) will have paid or
                    accrued in accordance  with  generally  accepted  accounting
                    principles all Taxes  concerning or  attributable  to R-CUBE
                    relating  to  periods   ending  on  or  before  the  Closing
                    regardless of whether reflected on Returns and (B) will have
                    withheld  with  respect to their  employees  all federal and
                    state income taxes,  FICA, FUTA, and other Taxes required to
                    be withheld;

                         (iii) R-CUBE  has not been delinquent in the payment of
                    any  Tax  nor  is  there  any  Tax  deficiency  outstanding,
                    proposed or assessed against R-CUBE, nor has R-CUBE executed
                    any waiver of the statute of limitations on or extending the
                    period for the assessment or collection of any Taxes;

                         (iv)  No  audit or other  examination  of any Return of
                    R-CUBE  is  presently  in  progress,  nor  has  R-CUBE  been
                    notified of any request for an audit or examination;

                         (v)   R-CUBE  has no  liabilities  for unpaid  federal,
                    state,  local and foreign  Taxes which have not been accrued
                    or reserved in accordance with generally accepted accounting
                    principles on the R-CUBE Balance Sheet;

                         (vi)  R-CUBE  has made available to REI and its counsel
                    copies of all federal  and state  income and all state sales
                    and use Tax  Returns  for all  periods  ending  on or  after
                    December 31, 1995;

                                       8
<PAGE>


                         (vii) There  are (and as of  immediately  following the
                    Closing there will be) no liens, pledges,  charges,  claims,
                    security  interests,  or  other  encumbrances  of  any  sort
                    ("Liens") on the assets of R-CUBE  relating or  attributable
                    to Taxes  other than liens for sales and  payroll  taxes not
                    yet due and payable;
                        
                         (viii) R-CUBE has no knowledge of any reasonable  basis
                    for the assertion of any claim relating or  attributable  to
                    Taxes which,  if adversely  determined,  would result in any
                    Lien on the assets of R-CUBE;

                         (ix)  None  of the assets of R-CUBE is property that is
                    required to be treated as owned by any other person pursuant
                    to the "safe harbor lease" provisions of former Code Section
                    168(f)(8),  and none of the assets is treated as "tax-exempt
                    use property" within the meaning of Code Section 168(h);

                         (x)   R-CUBE has not filed any consent  agreement under
                    Code Section  341(f) or agreed to have Code  Section  341(f)
                    apply to any  disposition  of a  "subsection  (f) asset" (as
                    defined in Code Section 341(f)(4)) owned by R-CUBE;

                         (xi)  R-CUBE    has   not   been    included   in   any
                    "consolidated," "unitary," or "combined" Return provided for
                    under the law of the United  States or any state or locality
                    with respect to Taxes for any taxable period;
        
                         (xii) R-CUBE   is  not  a  party  to  a  tax   sharing,
                    allocation,   indemnification   or  similar   agreement   or
                    arrangement,  and R-CUBE  does not owe any amount  under any
                    agreement or arrangement;

                         (xiii)  No  Return  of  R-CUBE  contains  a  disclosure
                    statement under Code Section 6662 (or predecessor provision)
                    or any similar provision of state, local, or foreign law;

                         (xiv) R-CUBE  is not  and has  not  been at any  time a
                    "United States real property holding corporation" within the
                    meaning of Code Section 897(c)(2);

                         (xv)  No  indebtedness of R-CUBE consists of "corporate
                    acquisition indebtedness" within the meaning of Code Section
                    279;

                         (xvi) R-CUBE has not taken any action not in accordance
                    with past  practice  that would have the effect of deferring
                    any Tax liability of R-CUBE from any period ending on before
                    the Closing  Date to any  taxable  period  ending  after the
                    Closing Date;

                         (xvii)  R-CUBE was not acquired in a  "qualified  stock
                    purchase"  under Code  Section  338(d)(3),  and no elections
                    under  Code  Section  338(g),   protective  carryover  basis
                    elections, or offset prohibition elections are applicable to
                    R-CUBE or any predecessor corporations; and

                                        9
 
<PAGE>

                        (xviii)  The tax  bases of the  assets  of  R-CUBE  for
                    purposes of determining future  amortization,  depreciation,
                    and other  federal  income  tax  deductions  are  accurately
                    reflected on the tax books and records of R-CUBE.

          2.14 Intellectual Property. There are no patents, patent applications,
     trademarks,  service marks, trademark and service mark applications,  trade
     names and copyrights  material to the lawful and efficient operation of the
     business of R-CUBE as presently  conducted and as presently  proposed to be
     conducted.

          2.15  Fees  and  Expenses.  Except  as set  forth  on  the  Disclosure
     Schedule,  neither R-CUBE nor Sellers have paid or become  obligated to pay
     any fee or commission to any broker,  finder or  intermediary in connection
     with the  transactions  contemplated by this Agreement.  Sellers agree that
     any such fees or commissions  described in the preceding  sentence shall be
     the sole responsibility of Sellers, whether or not the Closing occurs.

          2.16 Environmental Matters.

               (1) To R-CUBE's and Seller's knowledge, none of the properties or
          facilities  of R-CUBE is in violation  of any federal,  state or local
          law, ordinance,  regulation or order relating to industrial hygiene or
          to the  environmental  conditions on, under or about the properties or
          facilities,  including,  but not  limited  to,  soil and ground  water
          condition  except where the violations would not constitute a Material
          Adverse  Effect.  During the time that  R-CUBE has owned or leased its
          properties  and  facilities,  neither  R-CUBE  nor,  to  R-CUBE's  and
          Sellers' knowledge,  any third party, has released,  used,  generated,
          manufactured or stored on, under or about the properties or facilities
          or  transported  to or from the properties or facilities any hazardous
          materials.

               (2)  During  the  time  that  R-CUBE  has  owned  or  leased  its
          properties  and  facilities,  there has been no litigation  brought or
          threatened  against  R-CUBE  by, or any  settlement  reached by R-CUBE
          with, any party or parties alleging the presence, disposal, release or
          threatened release of any hazardous materials on, from or under any of
          the properties or facilities.

          2.17 [Intentionally Omitted].

          2.18  Disclosure.  No  representation  or  warranty  made by R-CUBE or
     Sellers  in this  Agreement  or the  Other  Agreements,  nor any  document,
     written information, written statement, financial statement, certificate or
     exhibit  prepared and furnished or to be prepared and furnished by Sellers,
     R-CUBE or their  representatives  pursuant to this  Agreement  or the Other
     Agreements or in connection with the  transactions  contemplated  hereby or
     thereby,  when taken together,  contains any untrue statement of a material
     fact, or omits to state a material fact necessary to make the statements or
     facts  contained   herein  or  therein  not  misleading  in  light  of  the
     circumstances under which they were furnished.

          2.19  Restrictions  on  Business  Activities.  There  is  no  material
     agreement,  judgment,  injunction, order or decree binding upon R-CUBE that
     has or could  reasonably be expected to have the effect of  prohibiting  or
     materially  impairing any business  practice of R-CUBE,  

                                       10
<PAGE>

     any  acquisition of property by R-CUBE or the conduct of business by R-CUBE
     as currently conducted.

          2.20 Accounts Receivable.  The accounts receivable shown on the R-CUBE
     Balance Sheet as of the R-CUBE  Balance Sheet Date, or thereafter  acquired
     prior  to the  date  hereof,  have  been  and  are  (as  the  case  may be)
     collectible  within 120 days from the Closing Date in amounts not less than
     the aggregate amounts thereof carried on the books of R-CUBE reduced by the
     reserves for discounts and bad debts taken on the R-CUBE Balance Sheet.

          2.21 Personal  Property.  R-CUBE has good title, free and clear of all
     title defects, objections and liens, including without limitation,  leases,
     chattel  mortgages,   conditional  sales  contracts,   collateral  security
     arrangements and other title or interest-retaining  arrangements, to all of
     its machinery, equipment, furniture, inventory and other personal property.
     All personal  property used in the business of R-CUBE is in good  operating
     condition.  All of the leases to personal property utilized in the business
     of R-CUBE are valid and  enforceable  against R-CUBE and are not in default
     by R-CUBE, or, to the knowledge of R-CUBE or Sellers,  are any of the other
     parties thereto in default thereof.

          2.22  Real  Property.  R-CUBE  does  not own any  real  property.  The
     Disclosure  Schedule  contains a list of all leases  for real  property  to
     which  R-CUBE is a party,  the square  footage  leased with respect to each
     lease and the  expiration  date of each lease.  These  leases are valid and
     enforceable and are not in default. To the knowledge of R-CUBE and Sellers,
     the real property leased or occupied by R-CUBE,  the  improvements  located
     thereon,  and  the  furniture,  fixtures  and  equipment  relating  thereto
     (including  plumbing,  heating,  air conditioning and electrical  systems),
     conform to any and all applicable health,  fire, safety,  zoning,  land use
     and building  laws,  ordinances and  regulations.  There are no outstanding
     contracts  made by R-CUBE for any  improvements  made to the real  property
     leased or occupied by R-CUBE that have not been paid for.

          2.23 Warranties.  R-CUBE has made no warranties or guarantees relating
     to its  services  other than as implied or required  by law.  R-CUBE has no
     warranty  or  indemnification  obligations  relating  to  patents  or other
     proprietary rights.

          2.24  Contracts.  The  Disclosure  Schedule  lists all oral or written
     agreements,  notes,  instruments or contracts to which R-CUBE is a party or
     by which its assets or properties may be bound which involve the payment or
     receipt of more than $25,000 (on an annual basis),  or which have a term of
     more than one year, or which involve  intellectual  property,  or which are
     employment or consulting agreements ("R-CUBE Contracts").  R-CUBE is not in
     default in performance of its obligations under any material  provisions of
     the R-CUBE Contracts.  Neither R-CUBE nor Sellers have any knowledge of any
     violation  of or  default  under any  R-CUBE  Contract  by any other  party
     thereto  or any  knowledge  of any  intent by any other  party to an R-CUBE
     Contract not to perform its obligations under any R-CUBE Contract.

          2.25 No  Goods or  Products.  R-CUBE  does not and has not  developed,
     sold, marketed or distributed any goods or products.

                                       11

<PAGE>

     3.   REPRESENTATIONS AND WARRANTIES OF REI.

          REI hereby represents and warrants to R-CUBE and Seller that:

          3.1  Organization;  Good Standing;  Qualification  and Power. REI is a
     corporation  duly  incorporated,  organized,  validly  existing and in good
     standing under the laws of the jurisdiction of its  incorporation,  has all
     requisite  corporate  power and  authority  to own,  lease and  operate its
     properties and to carry on its business as now being conducted, and is duly
     qualified and in good standing to do business in each jurisdiction in which
     the nature of its business or the  ownership  or leasing of its  properties
     makes  qualification  necessary,  other  than in  jurisdictions  where  the
     failure to qualify would not have a Material  Adverse Effect.  REI has made
     available  to R-CUBE or its  counsel  complete  and  correct  copies of the
     certificate of incorporation  and bylaws of REI, in each case as amended to
     the date of this  Agreement,  and  copies of all  minutes of  meetings  and
     actions by written consent of shareholders,  directors and board committees
     of REI.

          3.2 Capital Structure.

               3.2.1 Stock,  Options and Warrants.  The authorized capital stock
          of REI consists of 20,000,000  shares of common stock,  $.01 par value
          per share ("REI  Common  Stock"),  and  5,000,000  shares of Preferred
          Stock, $.01 par value per share ("REI Preferred Stock").  At the close
          of business on January 13, 1999,  5,680,710 shares of REI Common Stock
          were issued and  outstanding,  and 599,850  shares of REI Common Stock
          were  reserved for issuance upon the exercise of  outstanding  options
          ("REI  Options") and warrants ("REI  Warrants") to purchase REI Common
          Stock. No shares of REI Preferred Stock are issued or outstanding. All
          outstanding shares of REI Common Stock are validly issued,  fully paid
          and nonassessable and not subject to preemptive  rights.  REI has made
          available to R-CUBE true and correct copies of its 1996, 1997 and 1998
          Stock  Option  Plans  (each an "REI Plan" and  collectively,  the "REI
          Plans").

               3.2.2 No Other  Commitments.  Except for the REI  Options and REI
          Warrants  disclosed  in or  pursuant  to Section  3.2.1,  there are no
          options,  warrants, calls, rights,  commitments,  conversion rights or
          agreements of any character to which REI is a party or by which REI is
          bound obligating REI to issue, deliver or sell, or cause to be issued,
          delivered or sold,  any shares of capital  stock of REI or  securities
          convertible  into or exchangeable  for shares of capital stock of REI,
          or  obligating  REI to grant,  extend or enter  into any such  option,
          warrant, call, right, commitment, conversion right or agreement. There
          are no voting trusts or other  agreements or  understandings  to which
          REI is a party with respect to the voting of the capital stock of REI.

          3.3 Authority.

               3.3.1 Corporate Action. REI has all requisite corporate power and
          authority to enter into this Agreement and to perform its  obligations
          hereunder  and to consummate  the  transactions  contemplated  by this
          Agreement. The execution and delivery of this Agreement by REI and the
          consummation by REI of the transactions  contemplated hereby have been
          duly authorized by all necessary  corporate action on the part of REI.
          This  Agreement  has been duly executed and delivered by REI, and this
          Agreement is the valid and binding  obligation of REI,  enforceable in
        
                                       12
<PAGE>

          accordance with its terms,  except that  enforceability may be subject
          to (i) bankruptcy,  insolvency,  reorganization  or other similar laws
          affecting or relating to  enforcement of creditors'  rights  generally
          and (ii) general equitable principles.

               3.3.2  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions  contemplated  hereby nor compliance  with the provisions
          hereof will conflict  with, or result in any violations of, or cause a
          default (with or without  notice or lapse of time, or both) under,  or
          give  rise to a  right  of  termination,  amendment,  cancellation  or
          acceleration  of any  obligation  contained  in,  or the  loss  of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of REI under, any term, condition or provision of
          (x) the certificate of  incorporation or bylaws of REI or (y) any loan
          or credit agreement,  note, bond, mortgage,  indenture, lease or other
          material agreement,  judgment, order, decree, statute, law, ordinance,
          rule or regulation  applicable to REI or its respective  properties or
          assets, other than any such conflicts,  violations,  defaults, losses,
          liens, security interests, charges or encumbrances which, individually
          or in the aggregate, would not have a Material Adverse Effect.

               3.3.3  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          Governmental  Entity is required  to be obtained by REI in  connection
          with the execution and delivery of this Agreement or the  consummation
          of the transactions contemplated hereby.

          3.4 SEC Documents.

               3.4.1  SEC  Reports.  REI has made  available  to  R-CUBE  or its
          counsel  correct  and  complete  copies  of  each  report,   schedule,
          registration  statement and definitive  proxy  statement  filed by REI
          with  the  Securities  and  Exchange  Commission  ("SEC")  on or after
          January 1, 1997  ("REI SEC  Documents"),  which are all the  documents
          (other than  preliminary  material) that REI was required to file with
          the SEC on or after that date. As of their respective dates or, in the
          case of registration statements,  their effective dates (or if amended
          or superseded by a filing prior to the date of this Agreement, then on
          the date of such filing), none of the REI SEC Documents (including all
          exhibits and schedules thereto and documents incorporated by reference
          therein)  contained any untrue statement of a material fact or omitted
          to state a material fact required to be stated therein or necessary in
          order to make the statements  therein,  in light of the  circumstances
          under which they were made, not misleading,  and the REI SEC Documents
          complied when filed in all material  respects with the then applicable
          requirements  of the Securities Act or the Securities  Exchange Act of
          1934,  as amended,  as the case may be, and the rules and  regulations
          promulgated  by the SEC  thereunder.  REI has filed all  documents and
          agreements  which were required to be filed as exhibits to the REI SEC
          Documents.

               3.4.2  Financial  Statements.  The  financial  statements  of REI
          included in the REI SEC Documents  complied as to form in all material
          respects  with the then  applicable  accounting  requirements  and the
          published rules and regulations of the SEC with respect thereto,  were
          prepared in accordance with generally accepted  accounting  principles
          applied on a consistent  basis during the periods  involved (except as
          may have been  indicated  in the notes  thereto or, in the case of the
          unaudited  statements,  as permitted by Form 10-QSB promulgated by the
          SEC)  and  fairly  

                                       13
<PAGE>

          present  the  financial  position  of REI as at the  respective  dates
          thereof  and the  results  of its  operations  and cash  flows for the
          respective periods then ended.

          3.5 Litigation.  There is no suit, action, arbitration,  demand, claim
     or proceeding pending or, to the best knowledge of REI,  threatened against
     REI in connection with or relating to the transactions contemplated by this
     Agreement or of any action taken or to be taken in  connection  herewith or
     the consummation of the transactions contemplated hereby.

          3.6 Fees and Expenses. REI has not paid or become obligated to pay any
     fee or commission to any broker,  finder or intermediary in connection with
     the transactions contemplated by this Agreement.

          3.7  Disclosure.  No  representation  or warranty  made by REI in this
     Agreement,  nor  any  document,  written  information,  written  statement,
     financial  statement,  certificate or exhibits prepared and furnished or to
     be prepared and furnished by REI or its representatives  pursuant hereto or
     in  connection  with  the  transactions  contemplated  hereby,  when  taken
     together,  contains any untrue  statement of a material  fact,  or omits to
     state a material fact necessary to make the  statements or facts  contained
     herein or therein not misleading in light of the circumstances  under which
     they were furnished.

          3.8 Financial  Capacity.  REI has the financial  capability to pay the
     Purchase Price when due.

      4.  R-CUBE AND SELLERS' COVENANTS.

          4.1  Notification of Changes.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in  accordance  with its terms,  R-CUBE and Sellers will promptly
     notify REI in writing (a) of any event occurring  subsequent to the date of
     this Agreement that would render any  representation  or warranty of R-CUBE
     or any Seller contained in this Agreement or the Other Agreements,  if made
     on or as of the date of the event or the Closing Date, untrue or inaccurate
     in any material respect,  (b) of any Material Adverse Effect and (c) of any
     breach by R-CUBE or any Seller of any  covenant or  agreement  contained in
     this Agreement or the Other Agreements.

          4.2  Maintenance of Business.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance  with its terms,  R-CUBE and Sellers will use their
     reasonable  commercial  efforts to carry on and preserve  R-CUBE's business
     and its relationships  with customers,  suppliers,  employees and others in
     substantially the same manner as it has prior to the date hereof. If R-CUBE
     or  any  Seller  becomes  aware  of  any  material   deterioration  in  the
     relationship with any material customer, material supplier or key employee,
     R-CUBE or that Seller will promptly bring that information to the attention
     of REI.

          4.3  Conduct of  Business.  During  the  period  from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance with its terms, R-CUBE will, and Sellers will cause
     R-CUBE to,  continue to conduct its  business  and  maintain  its  

                                       14
<PAGE>

     business  relationships  in the  ordinary  and usual  course  and will not,
     without the prior written consent of REI:

               (1)  borrow  any money  except  for  amounts  that are not in the
          aggregate  material to the financial  condition of R-CUBE,  taken as a
          whole;

               (2)  enter  into any  material  transaction  not in the  ordinary
          course of its business;

               (3) encumber or permit to be encumbered  any of its assets except
          in the ordinary course of its business;

               (4) dispose of any of its assets except in the ordinary course of
          business consistent with past practice;

               (5) enter into any material lease or contract for the purchase or
          sale or  license  of any  property,  real or  personal,  except in the
          ordinary course of business;

               (6) fail to  maintain  its  equipment  and  other  assets in good
          working condition and repair according in all material respects to the
          standards it has  maintained  to the date of this  Agreement,  subject
          only to ordinary wear and tear;

               (7)  pay  (or   make   any  oral  or   written   commitments   or
          representations  to  pay)  any  bonus,  increased  salary  or  special
          remuneration to any officer, employee or consultant (except for normal
          salary increases  consistent with past practices not to exceed 10% per
          year) or enter into or vary the terms of any employment, consulting or
          severance  agreement with any person, pay any severance or termination
          pay (other than payments  made in accordance  with plans or agreements
          existing  on the date  hereof),  grant any  stock  option or issue any
          restricted stock, or enter into or modify any agreement or plan of the
          type described in Section 2.8;

               (8) change accounting methods;

               (9) declare, set aside or pay any cash or stock dividend or other
          distribution  in  respect  of capital  stock,  or redeem or  otherwise
          acquire any of its capital stock (other than pursuant to  arrangements
          with  terminated  employees or consultants  in the ordinary  course of
          business consistent with R-CUBE's past practice);

               (10) amend or  terminate  any  material  contract,  agreement  or
          license to which it is a party except those  amended or  terminated in
          the  ordinary  course of its  business,  or which are not  material in
          amount or effect;

               (11) alter in any way its manner of paying  payables,  collecting
          receivables or ordering products and services;

               (12) lend any  amount to any  person or  entity,  other  than (i)
          advances  for travel and  expenses  which are incurred in the ordinary
          course of business  consistent  with past  

                                       15


<PAGE>

          practice,  not material in amount and  documented  by receipts for the
          claimed amounts, or (ii) any loans pursuant to any R-CUBE 401(a) Plan;

               (13) guarantee or act as a surety for any obligation,  except for
          obligations in amounts that are not material;

               (14) waive or release any right or claim except for the waiver or
          release of  non-material  claims in the  ordinary  course of business,
          consistent  with past  practice  or the waiver or release of rights or
          claims set forth in the Disclosure Schedule;

               (15) issue or sell any shares of its  capital  stock of any class
          or any  other of its  securities,  or issue or  create  any  warrants,
          obligations,  subscriptions,  options, convertible securities or other
          commitments  to issue  shares of  capital  stock,  or  accelerate  the
          vesting of any outstanding option or other security;

               (16) split or combine the outstanding shares of its capital stock
          of any class or enter into any recapitalization or agreement affecting
          the number or rights of outstanding shares of its capital stock of any
          class or affecting any other of its securities;

               (17)  merge,  consolidate  or  reorganize  with,  or acquire  any
          entity;

               (18) conduct any  negotiations or agreements of any kind with any
          other  parties  with  respect to the sale of the assets or the capital
          stock of R-CUBE,  or for the  merger or sale of R-CUBE  with or to any
          other entity;

               (19) amend its articles of incorporation or bylaws;

               (20) license any intellectual property rights of R-CUBE except in
          the ordinary course of business consistent with past practice;

               (21) agree to any audit assessment by any tax authority;

               (22) change any insurance coverage; or

               (23) agree to do any of the  things  described  in the  preceding
          clauses in this Section 4.3.

          4.4 Regulatory  Approvals.  R-CUBE will promptly  execute and file, or
     join in the execution and filing of, any application or other document that
     may be necessary in order to obtain the authorization,  approval or consent
     of any governmental body,  federal,  state, local or foreign,  which may be
     required,  or which REI may  reasonably  request,  in  connection  with the
     consummation of the  transactions  contemplated  by this Agreement.  R-CUBE
     will use its reasonable efforts to promptly obtain all such authorizations,
     approvals and consents.

          4.5 Necessary Consents. During the term of this Agreement, R-CUBE will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 

                                       16

<PAGE>

     or  appropriate  in addition to those set forth in Section 4.4 to allow the
     consummation of the transactions contemplated hereby.

          4.6 Access to  Information.  Upon the  execution of a  confidentiality
     agreement, the form and substance of which is mutually acceptable to R-CUBE
     and REI, R-CUBE and Sellers will allow REI and its agents reasonable access
     to the files,  books,  records  and offices of R-CUBE,  including,  without
     limitation,   any  and  all   information   relating  to  R-CUBE's   taxes,
     commitments,  contracts, leases, licenses and real, personal and intangible
     property and financial  condition.  R-CUBE and Sellers will cause  R-CUBE's
     accountants to cooperate with REI and its agents in making available to REI
     all  financial  information   reasonably  requested,   including,   without
     limitation,  the right to examine all working papers  pertaining to all tax
     returns and financial statements prepared or reviewed by the accountants.

          4.7  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  R-CUBE and Sellers  will use  reasonable  efforts to satisfy or
     cause to be satisfied all the  conditions  precedent  that are set forth in
     Sections  10 and 11,  and  R-CUBE  and  Sellers  will use their  reasonable
     efforts to cause the  transactions  contemplated  by this  Agreement  to be
     consummated.

          4.8  Confidentiality.  All  information  concerning  REI or any of its
     subsidiaries ("REI  Subsidiaries")  received by R-CUBE or any Seller (other
     than that  information  which is a matter of public  knowledge or which has
     been published for public  distribution or filed as public information with
     any  governmental  authority)  shall not at any time,  except in connection
     with this Agreement and the transactions  contemplated  hereby, be used for
     the advantage of, or disclosed by, R-CUBE or any Seller to any third person
     without the prior written  consent of REI.  R-CUBE and Sellers may disclose
     the  information on a confidential  basis to their  affiliates,  employees,
     officers,  agents,  auditors,  investment  bankers,  consultants,  counsel,
     directors,   present  and  prospective   lenders,  and  state  and  federal
     regulatory  agencies.  This  covenant  shall  expire on  completion  of the
     Closing;  provided,  however,  that if the Closing does not occur, it shall
     expire three years after the date of this Agreement.

          4.9 Cooperation in Review of R-CUBE Financial  Statements.  R-CUBE and
     Sellers shall  cooperate  fully with REI and its  representatives  in their
     review of the R-CUBE  Financial  Statements  and the Final  Balance  Sheet,
     including  providing  access to the information  referred to in Section 4.6
     and any other information necessary in order to complete their review.

      5.  REI COVENANTS

          5.1 Regulatory Approvals.  REI will promptly execute and file, or join
     in the execution and filing of, any  application or other document that may
     be necessary in order to obtain the  authorization,  approval or consent of
     any  governmental  body,  federal,  state,  local or  foreign  which may be
     required,  or which R-CUBE may reasonably  request,  in connection with the
     consummation of the transactions  contemplated by this Agreement.  REI will
     use its  reasonable  efforts to  promptly  obtain all such  authorizations,
     approvals and consents.

          5.2 Necessary  Consents.  During the term of this Agreement,  REI will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 
                                       17

<PAGE>

     or  appropriate  in addition to those set forth in Section 5.1 to allow the
     consummation of the transactions contemplated hereby.

          5.3  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  REI will use its  reasonable  efforts to satisfy or cause to be
     satisfied all the conditions precedent that are set forth in Sections 9 and
     11,  and REI will use its  reasonable  efforts  to cause  the  transactions
     contemplated by this Agreement to be consummated.

          5.4 Confidentiality. All information concerning R-CUBE received by REI
     (other than that information which is a matter of public knowledge or which
     has been published for public  distribution or filed as public  information
     with  any  governmental  authority)  shall  not  at  any  time,  except  in
     connection with this Agreement and the transactions contemplated hereby, be
     used for the advantage of, or disclosed by, REI to any third person without
     the prior written consent of R-CUBE.  REI may disclose the information on a
     confidential  basis  to  its  affiliates,   employees,   officers,  agents,
     auditors, investment bankers, consultants,  counsel, directors, present and
     prospective  lenders,  and state and federal  regulatory  agencies  and, as
     provided  elsewhere in this  Agreement,  may disclose such  information  in
     press  releases  and  like  disclosures,  filings  with  the  SEC or  other
     governmental or  self-regulatory  agencies or as otherwise  required.  This
     covenant shall expire on completion of the Closing; provided, however, that
     if the Closing  does not occur,  it shall expire three years after the date
     of this Agreement.

      6.  EMPLOYEE MATTERS

          Following  the  Closing,  all  employees  of R-CUBE  will  either  (i)
     continue to be employees of R-CUBE or (ii) be offered employment by REI. In
     either case, those employees will be provided  employment benefits that are
     at least  comparable  to those they  currently  receive from R-CUBE and, if
     necessary,  R-CUBE or REI shall continue to sponsor those employees for the
     purpose of maintaining such employees' United States resident alien status.
     Notwithstanding  the foregoing,  REI makes no  representation,  warranty or
     promise as to the length of time that any such  employee will remain in the
     employ of R-CUBE or REI following the Closing.

                                       18

<PAGE>

      7.  INDEMNIFICATION OF THE PARTIES.

          7.1 Indemnification by Sellers

               (1) Sellers  shall,  jointly and  severally,  indemnify,  defend,
          protect and hold harmless REI, R-CUBE,  each of the REI  Subsidiaries,
          each of their  respective  successors  and  assigns  and each of their
          respective directors, officers, employees, agents and affiliates (each
          an "REI  Indemnified  Party"),  against all losses,  claims,  damages,
          actions, suits, proceedings, demands, assessments,  adjustments, costs
          and  expenses   (including   specifically,   but  without  limitation,
          reasonable  attorneys' fees and expenses of investigation  ("Losses"))
          based upon,  resulting  from or arising out of (i) any  inaccuracy  or
          breach  of  any  representation  or  warranty  of  R-CUBE  or  Sellers
          contained in or made in connection with this  Agreement,  and (ii) the
          breach by R-CUBE or Sellers of, or the failure by R-CUBE or Sellers to
          observe,  any  of  their  respective  covenants  or  other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.1  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          REI under  this  Section  7.1  thereafter);  provided,  however,  that
          Sellers  shall  indemnify  REI for any and all  Taxes  incurred  by or
          attributable to R-CUBE prior to the Closing,  and the  indemnification
          period  relating to any Taxes shall  terminate  on the tenth day after
          the expiration of the applicable  period of limitations on assessments
          and  collections  applicable to such taxes under the Internal  Revenue
          Code of 1986.

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by  Seller  under  Section  7.1(a)  shall not  exceed  50% of the
          Purchase  Price as  adjusted  pursuant  to Section  1.3 and net of any
          insurance  proceeds  received by REI, and Seller shall not be required
          to indemnify,  defend,  protect and hold  harmless an REI  Indemnified
          Party  pursuant  to  Section  7.1(a)  for  Losses  incurred  by an REI
          Indemnified  Party  with  respect to any  inaccuracy  or breach of any
          representation or warranty of R-CUBE or Sellers contained in Section 2
          of this  Agreement  or the  Other  Agreements  unless  and  until  the
          aggregate amount of such Losses exceeds $25,000, at which time the REI
          Indemnified  Parties  shall be entitled to  indemnification  hereunder
          with respect to all such  aggregate  amount of Losses  (including  the
          first  $25,000 of Losses) and any Losses  incurred or suffered by them
          thereafter.

          7.2 Indemnification by REI

               (1) REI  shall  indemnify,  defend,  protect  and  hold  harmless
          Sellers (each a "Seller  Indemnified  Party") against all Losses based
          upon, resulting from or arising out of (i) any inaccuracy or breach of
          any  representation,  or  warranty  of REI  contained  in or  made  in
          connection with this Agreement,  and (ii) the breach by REI of, or the
          failure by REI to observe,  any of its  covenants or other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.2  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          Sellers under this Section 7.2 thereafter).

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by REI under Section  7.2(a) shall not exceed 50% of the Purchase
          Price as adjusted  per Section 1.3 and net of any  insurance  proceeds
          received  by  Sellers,  and REI shall not be  required  to  indemnify,
          defend,  protect and hold harmless a Seller Indemnified Party pursuant
          to Section 7.2(a) for Losses  

                                       19

<PAGE>

          incurred by a Seller  Indemnified Party with respect to any inaccuracy
          or breach of any  representation  or warranty of REI contained in this
          Agreement unless and until the aggregate amount of such Losses exceeds
          $25,000,  at  which  time  the  Seller  Indemnified  Parties  shall be
          entitled  to  indemnification  hereunder  with  respect  to  all  such
          aggregate amount of Losses (including the first $25,000 of Losses) and
          any Losses incurred or suffered by them thereafter.

          7.3 Manner of Indemnification.  All indemnification under this Section
     7 shall be effected by the payment of cash or delivery of a bank  cashier's
     check, or by a combination of the foregoing.

      8.  CLOSING.

          8.1 Closing  Date.  Subject to the  termination  of this  Agreement as
     provided  in Section 12, the closing of the  transactions  contemplated  by
     this Agreement ("Closing") will take place at the offices of Rutan & Tucker
     LLP,  611 Anton,  Suite  1400,  Costa  Mesa,  California  92626 on the date
     following  satisfaction  of all  conditions set forth in Sections 9, 10 and
     11,  which  date  shall be  within  30 days of the date of this  Agreement,
     unless another place, time and date is selected by R-CUBE and REI ("Closing
     Date").

          8.2  Deliveries by R-CUBE and Sellers at the Closing.  At the Closing,
     R-CUBE and Sellers shall deliver to REI:

               (1) Certificates representing all of the Shares, free of liens or
          encumbrances, accompanied by duly executed stock powers by each Seller
          in favor of REI with all necessary  transfer stamps affixed thereto or
          other evidence of payment of applicable stock transfer taxes, if any;

               (2) The Final Balance Sheet;

               (3)  The  officers'  and  Sellers'  certificates  referred  to in
          Sections 10.1, 10.2 and 10.4; and

               (4) The opinion referred to in Section 10.7.

          8.3 Delivery by REI at the Closing. At the Closing,  REI shall deliver
     to  Seller  a  cashier's  check  or  evidence  of wire  transfer  of  funds
     representing the Purchase Price for the Seller's Shares.

      9.  CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE AND SELLER.

          The  obligations  of R-CUBE and Seller  hereunder  are  subject to the
     fulfillment  or  satisfaction  on or  before  the  Closing  of  each of the
     following  conditions (any one of which may be waived by R-CUBE and Seller,
     but only in a writing signed by R-CUBE and Seller):

          9.1 Accuracy of Representations and Warrants.  The representations and
     warranties  of REI set  forth in  Section 3 shall be true and  accurate  in
     every  material  respect on and 

                                       20

<PAGE>

     as of the  Closing  Date with the same force and effect as if they had been
     made at the Closing except to the extent the failure of the representations
     and  warranties  to be true and  accurate in such  respects has not had and
     could not  reasonably be expected to have a Material  Adverse  Effect,  and
     R-CUBE shall receive a certificate  to that effect  executed by REI's Chief
     Executive Officer and Chief Financial Officer.

          9.2  Covenants.  REI shall have performed and complied in all material
     respects  with all of its  covenants  required to be  performed by it under
     this  Agreement  on or before  the  Closing,  and  R-CUBE  shall  receive a
     certificate  to that  effect  signed by REI's Chief  Executive  Officer and
     Chief Financial Officer.

          9.3 Compliance with Law. There shall be no order,  decree or ruling of
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

      10. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI.

          The  obligations  of REI hereunder are subject to the  fulfillment  or
     satisfaction on or before the Closing, of each of the following  conditions
     (any one or more of  which  may be  waived  by REI,  but only in a  writing
     signed by REI).

          10.1 Accuracy of Representations and Warrants. The representations and
     warranties  of R-CUBE and Sellers set forth in Section 2 of this  Agreement
     and the  Other  Agreements  shall be true and  accurate  in every  material
     respect on and as of the Closing  Date with the same force and effect as if
     they had been made at the  Closing  except to the extent the failure of the
     representations and warranties to be true and accurate in such respects has
     not had and could not  reasonably  be expected  to have a Material  Adverse
     Effect, and REI shall receive  certificates to that effect executed by each
     Seller and by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.2  Covenants.  R-CUBE and Sellers shall have performed and complied
     in all  material  respects  with  all of  their  covenants  required  to be
     performed  by them  under this  Agreement  and the Other  Agreements  on or
     before the  Closing,  and REI shall  receive  certificates  to that  effect
     signed by each Seller and by  R-CUBE's  Chief  Executive  Officer and Chief
     Financial Officer.

          10.3  Completion of Due  Diligence.  REI shall have  conducted its due
     diligence  investigation of R-CUBE and shall have  determined,  in its sole
     and absolute discretion,  that the business,  records,  assets,  contracts,
     liabilities,  operations  and other  aspects of the business of R-CUBE (the
     "Business Aspects") are satisfactory to REI in all respects. REI shall have
     seven days (the  "Initial  Diligence  Period")  following  the date of this
     Agreement  to use its  reasonable  efforts  to  perform  its due  diligence
     investigation  of R-CUBE.  If, at the expiration of such Initial  Diligence
     Period,  REI shall request  additional  time to complete its due diligence,
     R-CUBE  and  Sellers  may  promptly  grant or deny  such  request  in their
     reasonable  discretion.  If such  request is granted,  it shall allow REI a
     minimum of three additional working days (the "Extension Diligence Period")
     to complete its due diligence investigation.  Within two days following the
     expiration  of the Initial  

                                       21

<PAGE>

     Diligence  Period and the  Extension  Diligence  Period,  if any, REI shall
     notify  R-CUBE  and  Sellers  as to  whether,  in REI's  sole and  absolute
     discretion, the Business Aspects are satisfactory to REI in all respects.

          10.4 Absence of Material Adverse Change. There shall not have been any
     material  adverse  change  in  the  condition   (financial  or  otherwise),
     properties,  assets,  liabilities,   businesses,   operations,  results  of
     operations or prospects of R-CUBE,  taken as a whole,  other than:  (a) any
     adverse effect resulting from conditions affecting the engineering software
     industry as a whole or the United States economy as a whole;  (b) a failure
     by R-CUBE to meet  internal  earnings  or revenue  projections;  or (c) any
     disruption of customer or supplier  relationships  arising primarily out of
     or  resulting  primarily  from  actions  contemplated  by  the  parties  in
     connection with, or which is primarily  attributable to the announcement of
     this  Agreement and the  transactions  contemplated  hereby,  to the extent
     attributable  thereto,  and REI shall receive a certificate  to that effect
     executed by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.5 Compliance with Law. There shall be no order, decree or ruling by
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

          10.6  Documents.   REI  shall  have  received  all  written  consents,
     assignments,  waivers,  authorizations  or  other  certificates  reasonably
     deemed  necessary by REI to provide for the  continuation in full force and
     effect of any and all  material  contracts  and  leases  of R-CUBE  and for
     R-CUBE to consummate the transactions  contemplated  hereby except when the
     failure to receive the consents,  etc.,  would not have a Material  Adverse
     Effect.

          10.7  Corporate  Opinion.  REI shall  have  received  the  opinion  of
     R-CUBE's   corporate   legal  counsel  based  upon   reasonably   requested
     certifications  as to factual  matters and dated the Closing Date regarding
     the status and authority of R-CUBE, the authorization of this Agreement and
     the transactions  contemplated  hereby by R-CUBE, and the binding effect of
     this Agreement on R-CUBE and Sellers.  The opinion shall be satisfactory to
     REI.

          10.8 Other Agreements. The closing of the Other Agreements shall occur
     simultaneously with the Closing of this Agreement.

      11. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI, R-CUBE AND SELLER.

          The  obligations of REI,  R-CUBE and Sellers  hereunder are subject to
     the fulfillment or  satisfaction  on or before the Closing,  of each of the
     following conditions (any one or more of which may be waived by REI, R-CUBE
     and Seller, but only in a writing signed by REI, R-CUBE and Seller).

          11.1 Government Consents.  There shall have been obtained on or before
     the Closing such material permits or  authorizations,  and there shall have
     been  taken  such  other  action,  as may be  required  to  consummate  the
     transactions  contemplated  by this Agreement by any  

                                       22

<PAGE>

     regulatory  authority having  jurisdiction over the parties and the actions
     herein  proposed to be taken,  including  but not  limited to  requirements
     under applicable federal and state securities laws.

          11.2 No Legal  Action.  No temporary  restraining  order,  preliminary
     injunction  or  permanent   injunction  or  other  order   preventing   the
     consummation  of the  transactions  contemplated  by this  Agreement or the
     Other  Agreements  shall have been issued by any federal or state court and
     remain in  effect,  nor  shall  any  proceeding  initiated  by the  federal
     government seeking any of the foregoing be pending.

      12. TERMINATION OF AGREEMENT.

          12.1  Termination.  This Agreement may be terminated at any time prior
     to the Closing:

               (1) by written agreement of R-CUBE, REI and Seller;

               (2) by R-CUBE  and  Seller,  if there has been a breach by REI of
          any representation,  warranty, covenant or agreement set forth in this
          Agreement  on the part of REI, or if any  representation  of REI shall
          have  become  untrue,  in either case which has or can  reasonably  be
          expected to have a Material Adverse Effect and which REI fails to cure
          prior to the Closing (except that no cure period shall be provided for
          a breach by REI which by its nature cannot be cured);

               (3) by REI, if there has been a breach by R-CUBE or Seller of any
          representation,  warranty,  covenant  or  agreement  set forth in this
          Agreement on the part of R-CUBE or Seller, or if any representation of
          R-CUBE or Seller shall have become untrue, in either case which has or
          can reasonably be expected to have a Material Adverse Effect and which
          R-CUBE or Seller  fails to cure prior to the Closing  (except  that no
          cure period  shall be provided  for a breach by R-CUBE or Seller which
          by its nature cannot be cured);

               (4) by R-CUBE, Seller or REI, if:

                    (i)...if all the  conditions for Closing shall not have been
               satisfied or waived on or before  February 28, 1999 other than as
               a result of a breach of this Agreement by the terminating  party;
               or

                    (ii)..if  a  permanent  injunction  or  other  order  by any
               federal or state  court  which  would make  illegal or  otherwise
               restrain  or  prohibit  the   consummation  of  the  transactions
               contemplated  by this Agreement  shall have been issued and shall
               have become final and nonappealable.

          12.2 Notice of  Termination.  Any  termination of this Agreement under
     Section 12.1 will be  effective  by the  delivery of written  notice of the
     terminating party to the other parties hereto.

                                       23
<PAGE>

          12.3 Effect of  Termination.  In the case of any  termination  of this
     Agreement  or the  Other  Agreements  as  provided  in  Section  12 of this
     Agreement or the Other  Agreements,  this Agreement  shall be of no further
     force and effect  (except as provided  in Section  14) and  nothing  herein
     shall relieve any party from  liability for any breach of this Agreement or
     the Other Agreements. In case of any termination as a result of a breach by
     a party or the  failure  of a party to  satisfy  Closing  conditions  to be
     satisfied by it and which are within its control, that party shall bear all
     of  the  expenses   (including,   without  limitation,   reasonable  legal,
     accounting  and other  advisory  fees) of the  other  parties  incurred  in
     connection with the failed transaction; provided, however, that in no event
     shall REI be responsible for payment of the fees and expenses  described in
     Section  2.15.  In all other  cases of  termination,  each  party  shall be
     responsible for its own expenses.

      13. NON-COMPETITION.

          13.1 Definitions. For purposes of this Section 13, the following terms
     shall have the following meanings:

               (1) "Customer  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Customer  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.3.

               (2) The term "Customers" shall mean, with respect to each Seller,
          any manager,  group or division  located in a specific  building that,
          during the year preceding the date of this  Agreement,  as of the date
          of this  Agreement,  during the period from the date of this Agreement
          to the Closing Date or during the Employee  Non-Solicitation Period or
          the Customer Non-Solicitation Period is or was a client or customer of
          R-CUBE.

               (3) The words  "directly  or  indirectly"  shall mean:  (i) being
          personally  involved in providing or seeking to provide services to an
          Employee,  Customer or Prospective Customer; (ii) participating in any
          person or  enterprise as an owner,  partner,  limited  partner,  joint
          venturer,  controlling  member or  controlling  shareholder;  or (iii)
          communicating  to any  such  person  or  enterprise  any  confidential
          information  of the business  conducted by R-CUBE  during the relevant
          period.

               (4)  "Employees"  shall  mean any  employee  of  R-CUBE as of, or
          immediately  prior to the date of this  Agreement,  during  the period
          from the date of this  Agreement  to the  Closing  Date or during  the
          Employee  Non-Solicitation  Period  or the  Customer  Non-Solicitation
          Period.

               (5) "Employee  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Employee  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.2.  Notwithstanding the foregoing sentence, with respect to
          the 

                                       24

<PAGE>

          employment of Mr.  Deepak  Suktbankar,  the Employee  Non-Solicitation
          Period shall be from the date of this Agreement  through and including
          the date that is 45 days after the Closing Date.

               (6) The term  "person"  shall  mean  any  natural  person,  firm,
          partnership,  association,  corporation,  company,  limited  liability
          company,  limited  partnership,  trust,  business trust,  Governmental
          Entity or other entity.

               (7) The term "Prospective Customer" shall mean any manager, group
          or division located in a specific  building that R-CUBE has contacted,
          or has  developed a strategy  or plan to  contact,  for the purpose of
          acquiring manager, group or division as a customer or client.

          13.2  Non-Solicitation  of  Employees.   Sellers  recognize  that  the
     Employees  are a  valuable  resource  of  R-CUBE.  Accordingly,  during the
     Employee  Non-Solicitation  Period,  no Seller  shall,  either  alone or in
     conjunction with any other person or entity, directly or indirectly go into
     business  with any  Employee or solicit,  induce or recruit any Employee to
     leave the employ of R-CUBE.

          13.3  Non-Solicitation of Customers.  Sellers recognize that customers
     are a  valuable  resource  of  R-CUBE.  Accordingly,  during  the  Employee
     Non-Solicitation  Period,  no Seller shall,  either alone or in conjunction
     with any other person or entity,  directly or indirectly  call on, solicit,
     take away, accept as a client,  customer or prospective client or customer,
     or attempt to call on, solicit, take away, accept as a client,  customer or
     prospective client or customer a Customer or Prospective Customer.

          13.4  Additional  Agreements.   Seller  hereby  expressly  agrees  and
     acknowledges that:

               (1) R-CUBE has protectable business interests with respect to its
          Employees,  Customers and Prospective Customers,  and that competition
          with and against such business interests would be harmful to R-CUBE;

               (2) the covenants  contained in this Section 13 are reasonable as
          to time and geographical area and do not place any unreasonable burden
          upon each Seller's ability to earn a livelihood;

               (3) the public will not be harmed as a result of  enforcement  of
          the covenants contained in this Section 13;

               (4) the personal  legal  counsel for each Seller has reviewed the
          covenants contained in this Section 13;

               (5) the parties have entered into the covenants  contained herein
          in connection with and as a condition precedent to the consummation of
          the  Agreement and the Other  Agreements,  pursuant to which REI shall
          acquire  R-CUBE;  the  agreements,  actions,  covenants,  and promises
          contained  herein  are  intended  to  protect  and ensure the value of
          R-CUBE, including its goodwill, which actions, covenants, and promises
          are a material  consideration to REI in connection 

                                       25

<PAGE>

          with this Agreement and the Other Agreements;  and, to the extent that
          the laws of any  jurisdiction  in which  this  Agreement  or the Other
          Agreements   shall  be   interpreted,   construed,   and/or   enforced
          distinguish  between  covenants given in connection with the sale of a
          business and its  goodwill  and  covenants  given in  connection  with
          employment,  this  covenant  will be given the broader  interpretation
          customarily  given  to  covenants  in  connection  with  the sale of a
          business and the transfer of goodwill to REI; and

               (6) each Seller understands and agrees to each and every term and
          condition  contained  Section  13 of  this  Agreement  and  the  Other
          Agreements.

          13.5 Remedies; Enforceability. Seller recognizes and acknowledges that
     irreparable damage will result to REI in the event of a breach by Seller or
     any of  Seller's  affiliates  of the  provisions  of this  Section 13, and,
     accordingly,  in the  event  of such a  breach,  REI will be  entitled,  in
     addition to any other legal or  equitable  damages and remedies to which it
     may be entitled or which may be available, to an injunction to restrain the
     violation thereof. If any provision of this Section 13 shall be adjudicated
     by a court of competent jurisdiction to be invalid or unenforceable because
     of the scope, duration, area of its applicability, or any other reason, the
     court making such  determination  will have the power to modify such scope,
     duration, or area, or all of them, or to strike an invalid or unenforceable
     provision, in whole or in part, to the extent necessary to make such scope,
     duration, area, or provision valid and enforceable.

      14. SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.

          All representations, warranties and covenants of the parties contained
     in this  Agreement  will  remain  operative  and in full force and  effect,
     regardless of any investigation made by or on behalf of the parties to this
     Agreement,  until the earlier of the  termination  of this Agreement or one
     year after the Closing Date, whereupon the representations,  warranties and
     covenants  will expire (except for  covenants,  such as those  contained in
     Sections  4.8,  5.4, 7 and 13,  that by their  terms  survive  for a longer
     period).

      15. MISCELLANEOUS.

          15.1  Governing  Law.  The  internal  laws of the State of  California
     (irrespective  of its choice of law principles) will govern the validity of
     this Agreement,  the construction of its terms and the  interpretation  and
     enforcement of the rights and duties of the parties hereto.

          15.2 Assignment;  Binding Upon Successors and Assigns. No party hereto
     may assign any of its rights or  obligations  hereunder  without  the prior
     written consent of the other parties hereto. This Agreement will be binding
     upon and inure to the  benefit of the parties  hereto and their  respective
     successors and permitted assigns.

          15.3  Severability.  If  any  provision  of  this  Agreement,  or  the
     application  thereof,  will for any  reason and to any extent be invalid or
     unenforceable,  the  remainder of this  Agreement and  application  of such
     provision  to other  persons or  circumstances  will be  interpreted  so as
     reasonably  to effect the  interest  of the  parties  hereto.  The  parties
     further  agree to  replace  such void or  unenforceable  provision  of this
     Agreement with a valid and enforceable  provision that will 

                                       26

<PAGE>

     achieve, to the greatest extent possible, the economic,  business and other
     purpose of the void unenforceable provision.

          15.4  Counterparts.  This  Agreement  may be executed in any number of
     counterparts, each of which will be deemed an original as regards any party
     whose  signature  appears thereon and all of which together will constitute
     one and the same instrument. This Agreement will become binding when one or
     more  counterparts  hereof,  individually or taken together,  will bear the
     signatures of all the parties reflected hereon as signatories.

          15.5 Other Remedies.  Except as otherwise provided herein, any and all
     remedies herein expressly  conferred upon a party will be deemed cumulative
     with and not  exclusive of any other remedy  conferred  hereby or by law on
     such  party,  and the  exercise  of any one remedy  will not  preclude  the
     exercise of any other.

          15.6  Amendment and Waivers.  Any term or provision of this  Agreement
     may be amended,  and the  observance  of any term of this  Agreement may be
     waived   (either   generally  or  in  a  particular   instance  and  either
     retroactively or prospectively) only by a writing signed by the party to be
     bound thereby. The waiver by a party of any breach hereof or default in the
     performance  hereof will not be deemed to  constitute a waiver of any other
     default or any succeeding breach or default.

          15.7  Expenses.  Except as provided in Section  12.3,  REI, on the one
     hand,  and  Sellers  and  R-CUBE,  on the  other,  will each bear their own
     expenses and legal fees  incurred  with respect to this  Agreement  and the
     transactions contemplated hereby.

          15.8 Attorneys'  Fees.  Should suit be brought to enforce or interpret
     any part of this  Agreement,  the  prevailing  party  will be  entitled  to
     recover, as an element of the costs of suit and not as damages,  reasonable
     attorneys' fees to be fixed by the court  (including,  without  limitation,
     costs, expenses and fees on any appeal).

          15.9 Notices.  All notices and other  communications  pursuant to this
     Agreement shall be in writing and deemed to be sufficient if contained in a
     written  instrument  and shall be  deemed  given if  delivered  personally,
     telecopied,  sent by  nationally-recognized  overnight courier or mailed by
     registered or certified mail (return receipt  requested),  postage prepaid,
     to the parties at the following  address (at such other address for a party
     as shall be specified by like notice):

<TABLE>
            <C>                     <S>
            If to R-CUBE to:........R-CUBE Technologies, Inc.
                                    20410 Town Center Lane, #160
                                    Cupertino, California  95014
                                    Attention: Chief Executive Officer
                                    Telecopier: (408) 255-2042
</TABLE>

                                       27
<PAGE>
<TABLE>
            <C>                     <S>
            With a copy to:.........Gray Cary Ware & Friedenrich LLP
                                    4365 Executive Drive, Suite 1600
                                    San Diego, California 92121-2189
                                    Attention: Christopher M. Smith, Esq.
                                    Telecopier: (619) 677-1477

            If to REI to:...........Research Engineers, Inc.
                                    22700 Savi Ranch Parkway
                                    Yorba Linda, California 92887
                                    Attention: Chief Executive Officer
                                    Telecopier: (714) 974-4771

            With a copy to:.........Rutan & Tucker, LP
                                    611 Anton, Suite 1400
                                    Costa Mesa, California 92626
                                    Attention: Cristy G. Lomenzo, Esq.
                                    Telecopier: (714) 546-9035

            If to Sellers to:.......Prakash Rao Pokala
                                    20063 Merritt Drive
                                    Cupertino, California 95014
</TABLE>

          All  notices  and  other  communications  shall be deemed to have been
     received (a) in the case of personal delivery, on the date of delivery, (b)
     in the case of a  telecopy,  when the party  receiving  the copy shall have
     confirmed  receipt of the  communication,  (c) in the case of  delivery  by
     nationally-recognized  overnight  courier,  on the business  day  following
     dispatch,  and (d) in the  case  of  mailing,  on the  third  business  day
     following such mailing.

          15.10 Construction of Agreement. This Agreement has been negotiated by
     the respective  parties hereto and their  attorneys and the language hereof
     will not be construed for or against either party. A reference to a Section
     or an Exhibit will mean a Section in, or Exhibit to, this Agreement  unless
     otherwise  explicitly  set forth.  The titles and  headings  herein are for
     reference  purposes only and will not in any manner limit the  construction
     of this Agreement which will be considered as a whole.

          15.11 No Joint  Venture.  Nothing  contained in this Agreement will be
     deemed or construed as creating a joint venture or partnership  between any
     of the parties to this  Agreement.  No party is by virtue of this Agreement
     authorized  as an  agent,  employee  or legal  representative  of any other
     party.  No  party  will  have the  power  to  control  the  activities  and
     operations  of any other.  The status of the parties  hereto is, and at all
     times will continue to be, that of independent  contractors with respect to
     each other. No party will have any power or authority to bind or commit any
     other.   No  party  will  hold  itself  out  as  having  any  authority  or
     relationship in contravention of this Section.

          15.12 Further  Assurances.  Each party agrees to cooperate  fully with
     the other  parties and to execute such further  instruments,  documents and
     agreements and to give such further written assurances as may be reasonably
     requested  by any other  party to evidence  and  reflect  the  

                                       28

<PAGE>

     transactions  described  herein and  contemplated  hereby and to carry into
     effect the intents and purposes of this Agreement.

          15.13 Absence of Third Party Rights.  No provisions of this  Agreement
     are intended, nor will be interpreted, to provide or create any third party
     beneficiary rights or any other rights of any kind in any client, customer,
     affiliate,  shareholder  or partner of any party hereto or any other person
     or entity unless specifically  provided otherwise herein, and, except as so
     provided, all provisions hereof will be personal solely between the parties
     to this Agreement.

          15.14 Entire Agreement.  This Agreement and the schedules and exhibits
     hereto  constitute  the entire  understanding  and agreement of the parties
     hereto with respect to the subject  matter  hereof and  supersede all prior
     and   contemporaneous   agreements  or   understandings,   inducements   or
     conditions,  express or implied,  written or oral, between the parties with
     respect  hereto.  The express terms hereof control and supersede any course
     of performance or usage of trade inconsistent with any of the terms hereof.

                                       29
<PAGE>




      IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  or caused this
Agreement to be executed by their duly authorized  respective officers as of the
date first above written.

REI:                                RESEARCH ENGINEERS, INC.,
                                    a Delaware corporation

                                    By: /S/ AMRIT K. DAS
                                    --------------------
                                    Amrit K. Das, President

                                    By: /S/ WAYNE L. BLAIR
                                    ----------------------
                                    Wayne L. Blair, Secretary

R-CUBE:                             R-CUBE TECHNOLOGIES, INC.,
                                    a California corporation

                                    By: /S/ KRISHNA P. REDDY
                                    ------------------------
                                    Krishna P. Reddy, President

                                    By: /S/ SRINIVASA REDDY MALIREDDY
                                    ---------------------------------
                                    Srinivasa Reddy Malireddy,
                                    Secretary

SELLER:                             /S/ PRAKASH RAO POKALA
                                    -------------------------
                                    PRAKASH RAO POKALA, an individual


I, THE  SPOUSE OF  SELLER,  HAVE  EXECUTED  THIS  AGREEMENT  FOR THE  PURPOSE OF
CONFIRMING MY CONSENT TO THE CONVEYANCE OF MY COMMUNITY  PROPERTY  INTEREST,  IF
ANY, IN SHARES OF CAPITAL STOCK OF R-CUBE PURSUANT TO THIS AGREEMENT

                /S/ SUCHARITA POKALA
                ----------------------------
                Print Name: Sucharita Pokala





                                       30


<PAGE>


                                                                     Exhibit 2.3








                            STOCK PURCHASE AGREEMENT

                                      AMONG

                            RESEARCH ENGINEERS, INC.

                            R-CUBE TECHNOLOGIES, INC.

                                       AND

                            SRINIVASA REDDY MALIREDDY


                                   DATED AS OF

                                JANUARY 18, 1999


<PAGE>
<TABLE>
<CAPTION>
                                       
                                TABLE OF CONTENTS

      DESCRIPTION                                                      PAGE NO.
      -----------                                                      --------
      <S>                                                                   <C>

      1.    PURCHASE AND SALE OF SHARES......................................1
            1.1   Purchase and Sale. ........................................1
            1.2   Purchase Price. ...........................................1
            1.3   Adjustment to Purchase Price. .............................1
            1.4   Payment of Purchase Price. ................................1
            1.5   Review of Final Balance Sheet. ............................2

      2.    REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.............2
            2.1   Organization; Good Standing; Qualification and Power. .....2
            2.2   Capital Structure..........................................3
                  2.2.1 Stock. ..............................................3
                  2.2.2 No Other Commitments. ...............................3
            2.3   Authority..................................................3
                  2.3.1 Corporate Action. ...................................3
                  2.3.2 Sellers' Authority. .................................3
                  2.3.3 No Conflict. ........................................3
                  2.3.4 Governmental Consents. ..............................4
            2.4   Financial Statements. .....................................4
            2.5   Compliance with Applicable Laws. ..........................4
            2.6   Insurance. ................................................4
            2.7   Litigation. ...............................................5
            2.8   Employee Benefits..........................................5
            2.9   Absence of Undisclosed Liabilities. .......................6
            2.10  Absence of Certain Changes or Events. .....................6
            2.11  No Defaults. ..............................................7
            2.12  Certain Agreements. .......................................7
            2.13  Taxes......................................................8
            2.14  Intellectual Property. ...................................10
            2.15  Fees and Expenses. .......................................10
            2.16  Environmental Matters.....................................10
            2.17  [Intentionally Omitted]. .................................10
            2.18  Disclosure. ..............................................10
            2.19  Restrictions on Business Activities. .....................10
            2.20  Accounts Receivable.......................................10
            2.21  Personal Property. .......................................11
            2.22  Real Property. ...........................................11
            2.23  Warranties. ..............................................11
            2.24  Contracts. ...............................................11
            2.25  No Goods or Products. ....................................11
</TABLE>
                                       i
<PAGE>
<TABLE>

      <S>                                                                   <C>
      3.    REPRESENTATIONS AND WARRANTIES OF REI...........................11
            3.1   Organization; Good Standing; Qualification and Power. ....11
            3.2   Capital Structure.........................................12
                  3.2.1 Stock, Options and Warrants. .......................12
                  3.2.2 No Other Commitments. ..............................12
            3.3   Authority.................................................12
                  3.3.1 Corporate Action. ..................................12
                  3.3.2 No Conflict. .......................................12
                  3.3.3 Governmental Consents. .............................13
            3.4   SEC Documents.............................................13
                  3.4.1 SEC Reports. .......................................13
                  3.4.2 Financial Statements. ..............................13
            3.5   Litigation. ..............................................13
            3.6   Fees and Expenses. .......................................14
            3.7   Disclosure. ..............................................14
            3.8   Financial Capacity........................................14

      4.    R-CUBE AND SELLERS' COVENANTS...................................14
            4.1   Notification of Changes. .................................14
            4.2   Maintenance of Business. .................................14
            4.3   Conduct of Business. .....................................14
            4.4   Regulatory Approvals. ....................................16
            4.5   Necessary Consents. ......................................16
            4.6   Access to Information. ...................................16
            4.7   Satisfaction of Conditions Precedent. ....................17
            4.8   Confidentiality. .........................................17
            4.9   Cooperation in Review of R-CUBE Financial Statements. ....17

      5.    REI COVENANTS...................................................17
            5.1   Regulatory Approvals. ....................................17
            5.2   Necessary Consents. ......................................17
            5.3   Satisfaction of Conditions Precedent. ....................17
            5.4   Confidentiality. .........................................18

      6.    EMPLOYEE MATTERS................................................18

      7.    INDEMNIFICATION OF THE PARTIES..................................18
            7.1   Indemnification by Sellers................................18
            7.2   Indemnification by REI....................................19
            7.3   Manner of Indemnification. ...............................19
</TABLE>
                                       ii

<PAGE>
<TABLE>

      <S>                                                                   <C>
      8.    CLOSING.........................................................19
            8.1   Closing Date. ............................................19
            8.2   Deliveries by R-CUBE and Sellers at the Closing. .........19
            8.3   Delivery by REI at the Closing. ..........................20

      9.    CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE
            AND SELLER......................................................20
            9.1   Accuracy of Representations and Warranties. ..............20
            9.2   Covenants. ...............................................20
            9.3   Compliance with Law. .....................................20

      10.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI......................20
            10.1  Accuracy of Representations and Warranties. ..............21
            10.2  Covenants. ...............................................21
            10.3  Completion of Due Diligence...............................21
            10.4  Absence of Material Adverse Change. ......................21
            10.5  Compliance with Law. .....................................21
            10.6  Documents. ...............................................21
            10.7  Corporate Opinion. .......................................22
            10.8  Other Agreements..........................................22

      11.   CONDITIONS PRECEDENT TO OBLIGATIONS OF REI,
            R-CUBE AND SELLER...............................................22
            11.1  Government Consents. .....................................22
            11.2  No Legal Action. .........................................22

      12.   TERMINATION OF AGREEMENT........................................22
            12.1  Termination. .............................................22
            12.2  Notice of Termination. ...................................23
            12.3  Effect of Termination. ...................................23

      13.   NON-COMPETITION.................................................23
            13.1  Definitions...............................................23
            13.2  Non-Solicitation of Employees. ...........................24
            13.3  Non-Solicitation of Customers. ...........................24
            13.4  Additional Agreements.....................................25
            13.5  Remedies; Enforceability..................................25

      14.   SURVIVAL OF REPRESENTATIONS, WARRANTIES
            AND COVENANTS...................................................26

      15.   MISCELLANEOUS...................................................26
            15.1  Governing Law. ...........................................26
            15.2  Assignment; Binding Upon Successors and Assigns. .........26
            15.3  Severability. ............................................26
            15.4  Counterparts. ............................................26
</TABLE>
                                      iii.
<PAGE>
<TABLE>

      <S>                                                                   <C>
            15.5  Other Remedies. ..........................................26
            15.6  Amendment and Waivers. ...................................26
            15.7  Expenses. ................................................27
            15.8  Attorneys' Fees. .........................................27
            15.9  Notices. .................................................27
            15.10 Construction of Agreement. ...............................28
            15.11 No Joint Venture. ........................................28
            15.12 Further Assurances. ......................................28
            15.13 Absence of Third Party Rights. ...........................28
            15.14 Entire Agreement. ........................................28
</TABLE>
                                      iv.
<PAGE>
 

                            STOCK PURCHASE AGREEMENT


      THIS STOCK  PURCHASE  AGREEMENT  ("Agreement")  is entered into as of this
18th  day  of  January,  1999,  among  Research  Engineers,   Inc.,  a  Delaware
corporation  ("REI"),  R-CUBE  Technologies,   Inc.,  a  California  corporation
("R-CUBE"), and Srinivasa Reddy Malireddy, an individual ("Seller").

                                    RECITALS

     A.  Krishna P. Reddy, an individual, and Prakash Rao Pokala,  an individual
(collectively,  the "Other Sellers," and together with Seller, "Sellers"),  own,
in the  aggregate,  all of the issued and  outstanding  shares (the "Shares") of
capital stock of R-CUBE.

      B. Seller owns 1,100,000 of the Outstanding Shares ("Seller's Shares").

      C. REI desires to purchase  from  Sellers,  and Sellers  desire to sell to
REI,  the  Outstanding  Shares  on the terms  and  conditions  set forth in this
Agreement and in similar Stock Purchase  Agreements (the "Other  Agreements") to
be negotiated  and entered into between REI and the Other Sellers as of the date
of this Agreement.

                                    AGREEMENT

      NOW, THEREFORE, the parties to this Agreement agree as follows:

      1.  PURCHASE AND SALE OF SHARES.

          1.1 Purchase and Sale.  Subject to the terms and  conditions set forth
     herein,  at the  Closing  (as  defined  in Section 8 below),  Seller  shall
     transfer,  convey, assign and deliver Seller's Shares to REI, and REI shall
     acquire, purchase and accept Seller's Shares from Seller.

          1.2  Purchase  Price.  Subject  to  the  adjustments  to  be  made  in
     accordance  with the  provisions  of Sections 1.3 through 1.5, the purchase
     price for Seller's Shares is $1,066,272 (the "Purchase Price").

          1.3 Adjustment to Purchase Price. The Purchase Price shall be adjusted
     upward by 45.96% of the amount,  if any, that the  shareholders'  equity of
     R-CUBE ("Final  Shareholders'  Equity") as shown on R-CUBE's  balance sheet
     ("Final  Balance  Sheet") to be prepared by R-CUBE's  accountants as at the
     Closing Date  (defined in Section 8.1) and  delivered to REI at the Closing
     exceeds $500,000.

          1.4 Payment of Purchase Price. The Purchase Price shall be paid by REI
     to Seller as follows:

              (1) At the Closing,REI shall pay to Seller the Purchase Price; and

                                       1

<PAGE>


              (2)  Subject to  Section  1.5,  within 30 days after the  Closing
          Date,  REI  shall  pay to  Seller  in cash the  amount  of any  upward
          adjustment to the Purchase Price made pursuant to Section 1.3.

          1.5 Review of Final Balance Sheet. REI and its  representatives  shall
     have 15 days to review  the Final  Balance  Sheet.  If REI  disagrees  with
     R-CUBE's calculation of the Final Shareholders' Equity, REI shall within 15
     days  after  the  Closing  Date give  written  notice  to  Sellers  of such
     disagreement  specifying in  reasonable  detail,  insofar as possible,  the
     nature and extent of the  disagreement.  If REI and  Sellers  are unable to
     resolve  any such  disagreement  within 15 days  after  REI  gives  Sellers
     notice, the disagreement  shall be referred for final  determination to any
     accounting firm of national  reputation as may be reasonably  acceptable to
     REI and  Sellers.  REI and  Sellers may submit to the  accounting  firm any
     facts that they deem relevant to the  determination,  and the determination
     of the accounting firm shall be conclusive, non-appealable and binding upon
     REI  and  Sellers  for  all  purposes.   Any  necessary  upward  adjustment
     determined  by the  accounting  firm shall be payable in cash by REI within
     three  days  after REI has been  notified  of such  determination.  REI and
     Sellers agree that the  procedures  established by Sections 1.2 through 1.5
     shall constitute the exclusive procedures for determining the consideration
     to be paid by REI to Sellers for the  Shares.  Costs  incurred  pursuant to
     this Section 1.5 shall be borne equally by REI and Sellers.

     2.   REPRESENTATIONS AND WARRANTIES OF R-CUBE AND SELLERS.

          Except as set forth in a schedule  dated the date of this  Agreement
and  delivered by R-CUBE and Seller to REI  concurrently  herewith  ("Disclosure
Schedule") specifically  identifying the Section of this Agreement requiring the
delivery of such  disclosure,  R-CUBE and Seller represent and warrant to REI as
set forth below. In this Agreement, any reference to any event, change or effect
being  "material"  with  respect  to any entity or group of  entities  means any
material  event,  change  or  effect  related  to the  condition  (financial  or
otherwise), properties, assets, liabilities,  businesses, operations, results of
operations or prospects of such entity or group of entities taken as a whole. In
this  Agreement,  the term "Material  Adverse  Effect" used in connection with a
party or any of that party's subsidiaries means any event, change or effect that
is materially  adverse to the condition  (financial or  otherwise),  properties,
assets, liabilities,  businesses, operations, results of operations or prospects
of that party and its subsidiaries,  taken as a whole; provided, however, that a
Material Adverse Effect shall not include: (a) any adverse effect resulting from
conditions  affecting the engineering software industry as a whole or the United
States economy as a whole; (b) a failure by R-CUBE to meet internal  earnings or
revenue projections; or (c) any disruption of customer or supplier relationships
arising primarily out of or resulting primarily from actions contemplated by the
parties  in  connection  with,  or  which  is  primarily   attributable  to  the
announcement of this Agreement and the transactions  contemplated hereby, to the
extent attributable thereto.

          2.1 Organization; Good Standing;  Qualification and Power. R-CUBE is a
     corporation duly organized, validly existing and in good standing under the
     laws of the jurisdiction of its incorporation,  has all requisite corporate
     power and authority to own,  lease and operate its  properties and to carry
     on its business as now being  conducted,  and is duly qualified and in good
     standing  to do business  in each  jurisdiction  in which the nature of its
     business or the ownership or leasing of its properties makes  qualification
     necessary,  other than in jurisdictions  where the failure to qualify would
     not have a  Material  Adverse  Effect.  R-CUBE  does not own,  directly  or
     indirectly,  

                                       2
<PAGE>
 
     shares of capital stock of any other  corporation or any equity interest in
     any other entity,  nor does R-CUBE  control,  directly or  indirectly,  any
     other corporation,  association or business  organization.  R-CUBE has made
     available to REI or its counsel complete and correct copies of the articles
     of incorporation  and bylaws of R-CUBE, in each case as amended to the date
     of this  Agreement,  and copies of all minutes of  meetings  and actions by
     written consent of shareholders, directors and board committees of R-CUBE.

          2.2 Capital Structure.

               2.2.1 Stock.  The authorized  capital stock of R-CUBE consists of
          10,000,000  shares of common  stock,  no par value per share  ("R-CUBE
          Common Stock"). As of the date of this Agreement,  3,300,000 shares of
          R-CUBE Common Stock are issued and outstanding. All outstanding shares
          of the  capital  stock of R-CUBE are  validly  issued,  fully paid and
          nonassessable,  are not subject to preemptive  rights and are owned by
          Sellers  free and clear of any  liens,  security  interests,  pledges,
          agreements, claims, charges or encumbrances.
      
               2.2.2 No  Other  Commitments.  There  are no  options,  warrants,
          calls,  rights,  commitments,  conversion  rights or agreements of any
          character  to which  R-CUBE  is a party or by  which  R-CUBE  is bound
          obligating  R-CUBE to issue,  deliver or sell,  or cause to be issued,
          delivered or sold, any shares of capital stock of R-CUBE or securities
          convertible  into or  exchangeable  for  shares  of  capital  stock of
          R-CUBE,  or  obligating  R-CUBE  to grant,  extend  or enter  into any
          option,  warrant,  call,  right,   commitment,   conversion  right  or
          agreement.   There  are  no  voting  trusts  or  other  agreements  or
          understandings  to which  R-CUBE or any Seller is a party with respect
          to the voting of the capital stock of R-CUBE.

          2.3 Authority.

               2.3.1 Corporate Action.  R-CUBE has all requisite corporate power
          and  authority  to  enter  into  this  Agreement  and to  perform  its
          obligations hereunder and to consummate the transactions  contemplated
          by this  Agreement.  The execution  and delivery of this  Agreement by
          R-CUBE and the consummation by R-CUBE of the transactions contemplated
          hereby have been duly authorized by all necessary  corporate action on
          the  part of  R-CUBE.  This  Agreement  has  been  duly  executed  and
          delivered  by  R-CUBE,  and this  Agreement  is the valid and  binding
          obligation of R-CUBE, enforceable in accordance with its terms, except
          that such enforceability may be subject to (i) bankruptcy, insolvency,
          reorganization   or  other  similar  laws  affecting  or  relating  to
          enforcement of creditors'  rights generally and (ii) general equitable
          principles.

               2.3.2  Sellers'  Authority.  Each of  Sellers  has full power and
          capacity to enter into this Agreement and the Other  Agreements.  This
          Agreement  and the  Other  Agreements  have  been  duly  executed  and
          delivered by Sellers and this  Agreement  and the Other  Agreement are
          the valid and binding obligation of Sellers, enforceable in accordance
          with their  terms,  except that  enforceability  may be subject to (i)
          bankruptcy, insolvency, reorganization or other similar laws affecting
          or relating to  enforcement  of creditors'  rights  generally and (ii)
          general equitable principles.

               2.3.3  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions contemplated hereby nor compliance with the

                                       3
 

<PAGE>

          provisions  hereof will conflict with, or result in any violations of,
          or cause a default (with or without  notice or lapse of time, or both)
          under, or give rise to a right of termination, amendment, cancellation
          or  acceleration  of any  obligation  contained in, or the loss of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of R-CUBE under, any term, condition or provision
          of (x) the  articles of  incorporation  or bylaws of R-CUBE or (y) any
          loan or credit agreement,  note, bond, mortgage,  indenture,  lease or
          other material  agreement,  judgment,  order,  decree,  statute,  law,
          ordinance,  rule or regulation  applicable to R-CUBE or its properties
          or  assets,  other  than any  such  conflicts,  violations,  defaults,
          losses,  liens,  security  interests,  charges, or encumbrances which,
          individually  or in the aggregate,  would not have a Material  Adverse
          Effect.

               2.3.4  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          court,  administrative  agency  or  commission  or other  governmental
          authority   or   instrumentality,   domestic   or   foreign   (each  a
          "Governmental  Entity"),  is  required  to be  obtained  by  R-CUBE in
          connection  with the execution  and delivery of this  Agreement or the
          consummation of the transactions contemplated hereby.

          2.4 Financial  Statements.  R-CUBE has furnished to REI copies of: (a)
     the unaudited balance sheets of R-CUBE at December 31, 1996, 1997 and 1998,
     and the related  statements of income for the periods then ended.  Prior to
     the Closing, R-CUBE shall furnish to REI copies of R-CUBE's audited balance
     sheet at  December  31, 1998 and the  related  statement  of income for the
     period then ended. All financial statements referred to in this Section 2.4
     ("R-CUBE Financial  Statements") are or will be complete and correct,  have
     been prepared in accordance with generally accepted  accounting  principles
     applied on a consistent  basis during the  respective  periods,  and fairly
     present or will fairly present the financial  condition of R-CUBE as at the
     respective  dates  thereof and the results of  operation  of R-CUBE for the
     respective  periods  covered  by the  statements  of  income  contained  in
     therein.  R-CUBE does not have any  material  obligations  or  liabilities,
     contingent  or  otherwise,  not fully  disclosed  by the  R-CUBE  Financial
     Statements.

          2.5  Compliance  with  Applicable  Laws. The business of R-CUBE is not
     being  conducted in violation of any law,  ordinance,  regulation,  rule or
     order of any Governmental  Entity where the violation would have a Material
     Adverse  Effect.  R-CUBE has not been notified by any  Governmental  Entity
     that any  investigation  or review  with  respect  to R-CUBE is  pending or
     threatened,  nor  has  any  Governmental  Entity  notified  R-CUBE  of  its
     intention to conduct an  investigation  or review.  R-CUBE has all permits,
     licenses and franchises from Governmental  Entities required to conduct its
     business as now being  conducted,  except for those whose absence would not
     have a Material Adverse Effect.

          2.6 Insurance. R-CUBE maintains and at all times since January 1, 1997
     has  maintained  general  liability  insurance  that R-CUBE  believes to be
     reasonably  prudent for its business.  The Disclosure  Schedule  contains a
     complete and correct list of all insurance  policies  maintained by R-CUBE.
     R-CUBE has delivered or made  available to REI complete and correct  copies
     of all such  policies,  together  with all riders and  amendments  thereto.
     These  policies are in full force and effect,  and all premiums due thereon
     have been paid. R-CUBE has complied in all material respects with the terms
     and provisions of the policies.  In the opinion of R-CUBE reasonably formed

                                       4

<PAGE>

     and held,  there is no reasonable basis on which a claim should or could be
     made under any such policy.

          2.7 Litigation.  There is no suit, action, arbitration,  demand, claim
     or  proceeding  pending or, to the best  knowledge  of R-CUBE and  Sellers,
     threatened against R-CUBE, nor is there any judgment,  decree,  injunction,
     rule or order of any Governmental Entity or arbitrator  outstanding against
     R-CUBE that, individually or in the aggregate, could reasonably be expected
     to have a Material Adverse Effect.  R-CUBE has made available to REI or its
     counsel correct and complete copies of all  correspondence  prepared by its
     counsel for R-CUBE's  accountants in connection with the last two completed
     reviews of R-CUBE's financial  statements and any correspondence  since the
     date of the last review.

          2.8 Employee Benefits.

               (1) R-CUBE has made  available to REI a list of all  employees of
          R-CUBE and their salaries as of the date of this Agreement. R-CUBE has
          made available to REI copies or  descriptions of all written or formal
          plans or  agreements  involving  direct or  indirect  compensation  or
          benefits  (including  any employment  agreements  entered into between
          R-CUBE  and  any   employee   of  R-CUBE,   but   excluding   workers'
          compensation,  unemployment compensation and other government-mandated
          programs)  currently  or  previously  maintained,  contributed  to  or
          entered  into by R-CUBE  under which  R-CUBE has any present or future
          obligation  or  liability  (collectively,  "R-CUBE  Employee  Plans").
          Copies of all R-CUBE Employee Plans (and, if applicable, related trust
          agreements)  and all  amendments  thereto and written  interpretations
          thereof (including summary plan descriptions) have been made available
          to REI or its  counsel.  No  contributions  are due or past  due  from
          R-CUBE with respect to any of the R-CUBE  Employee  Plans. To R-CUBE's
          and Sellers'  knowledge,  each of the R-CUBE  Employee  Plans has been
          maintained  in  compliance  with its terms  and with the  requirements
          prescribed by any and all statutes, orders, rules and regulations that
          are applicable to the R-CUBE  Employee Plans except for  noncompliance
          which would not have a Material Adverse Effect.

               (2) R-CUBE has made  available to REI a list of each  employment,
          severance or other similar  contract,  arrangement  or policy and each
          plan or arrangement  providing for insurance  coverage  (including any
          self-insured  arrangements),  workers'  benefits,  vacation  benefits,
          severance    benefits,    disability    benefits,    death   benefits,
          hospitalization benefits,  retirement benefits, deferred compensation,
          profit-sharing, bonuses, stock options, stock purchase, phantom stock,
          stock  appreciation  or  other  forms  of  incentive  compensation  or
          post-retirement  insurance,  compensation  or benefits for  employees,
          consultants or directors  which (i) is not one of the R-CUBE  Employee
          Plans, (ii) is entered into, maintained or contributed to, as the case
          may be, by R-CUBE and (iii) covers any employee or former  employee of
          R-CUBE.  The  contracts,  plans  and  arrangements  described  in this
          paragraph  2.8(d) are referred to  collectively as the "R-CUBE Benefit
          Arrangements." To R-CUBE's and Sellers' knowledge,  each of the R-CUBE
          Benefit  Arrangements  has been  maintained in substantial  compliance
          with its terms  and with the  requirements  prescribed  by any and all
          statutes, orders, rules and regulations which are applicable to R-CUBE
          Benefit Arrangements.  R-CUBE has made available to REI or its counsel
          a  complete  and  correct  copy or  description  of each of the R-CUBE
          Benefit Arrangements.

                                       5

<PAGE>


               (3) There has been no amendment  to,  written  interpretation  or
          announcement   by  R-CUBE   relating   to,   or  change  in   employee
          participation  or coverage under,  any of the R-CUBE Employee Plans or
          R-CUBE Benefit Arrangements that would increase materially the expense
          of   maintaining   the  R-CUBE   Employee   Plans  or  R-CUBE  Benefit
          Arrangements  above  the  level of the  expense  incurred  in  respect
          thereof for the fiscal year ended December 31, 1998.

               (4) To R-CUBE's and Sellers'  knowledge,  R-CUBE is in compliance
          in all material  respects with all  applicable  laws,  agreements  and
          contracts relating to employment,  employment practices, wages, hours,
          and terms and conditions of employment.

          2.9 Absence of  Undisclosed  Liabilities.  Except as  disclosed on the
     Disclosure  Schedule,  at December  31,  1998 (the  "R-CUBE  Balance  Sheet
     Date"), (i) R-CUBE had no liabilities or obligations of any nature (matured
     or unmatured,  fixed or contingent) which were material to R-CUBE, taken as
     a whole,  and were not  provided  for in the  unaudited  December  31, 1998
     balance  sheet  (the  "R-CUBE  Balance  Sheet"),  a copy of which  has been
     delivered to REI; and (ii) all reserves established by R-CUBE and set forth
     in the R-CUBE Balance Sheet were reasonably adequate.

          2.10 Absence of Certain  Changes or Events.  Since the R-CUBE  Balance
     Sheet Date there has not occurred:

               (1)  any  change  in  the  condition  (financial  or  otherwise),
          properties,  assets, liabilities,  businesses,  operations, results of
          operations  or  prospects  of  R-CUBE  taken  as a  whole  that  could
          reasonably constitute a Material Adverse Effect; 

               (2) any amendments or changes in the articles of incorporation or
          bylaws of R-CUBE;

               (3) any damage, destruction or loss, whether covered by insurance
          or not, that could reasonably constitute a Material Adverse Effect;

               (4) any redemption,  repurchase or other acquisition of shares of
          R-CUBE  Common Stock by R-CUBE  (other than  pursuant to  arrangements
          with terminated employees or consultants), or any declaration, setting
          aside or payment of any  dividend  or other  distribution  (whether in
          cash, stock or property) with respect to R-CUBE Common Stock;

               (5) any material  increase in or modification of the compensation
          or  benefits  payable  or to  become  payable  by R-CUBE to any of its
          directors  or  employees,  except in the  ordinary  course of business
          consistent with past practice;

               (6)  any  material  increase  in or  modification  of any  bonus,
          pension,  insurance  or any of the  R-CUBE  Employee  Plans or  R-CUBE
          Benefit Arrangements  (including,  but not limited to, the granting of
          stock options,  restricted stock awards or stock appreciation  rights)
          made to, for or with any of its employees,  other than in the ordinary
          course of business consistent with past practice;

                                       6
<PAGE>
 
              (7) any  acquisition or sale of a material  amount of property or
          assets of  R-CUBE,  other  than in the  ordinary  course  of  business
          consistent with past practices;

               (8) any  alteration  in any term of any  outstanding  security of
          R-CUBE;

               (9) any (A) incurrence,  assumption or guarantee by R-CUBE of any
          debt  for  borrowed  money;  (B)  issuance  or sale of any  securities
          convertible into or exchangeable for debt securities of R-CUBE; or (C)
          issuance or sale of options or other  rights to acquire  from  R-CUBE,
          directly or  indirectly,  debt  securities of R-CUBE or any securities
          convertible into or exchangeable for any such debt securities;

               (10) any  creation  or  assumption  by  R-CUBE  of any  mortgage,
          pledge, security interest or lien or other encumbrance on any asset;

               (11) any making of any loan,  advance or capital  contribution to
          or  investment  in any person  other than (i) travel loans or advances
          made in the  ordinary  course of business of R-CUBE,  (ii) other loans
          and  advances in an  aggregate  amount  which does not exceed  $25,000
          outstanding  at any time and  (iii)  purchases  on the open  market of
          liquid, publicly traded securities;

               (12) any entering into, amendment of, relinquishment, termination
          or  non-renewal  by  R-CUBE  of  any  contract,   lease   transaction,
          commitment  or other right or  obligation  other than in the  ordinary
          course of business;

               (13) any  transfer  or grant of an R-CUBE  intellectual  property
          right,  other than those transferred or granted in the ordinary course
          of business;

               (14) any labor dispute or charge of unfair labor practice  (other
          than  routine  individual  grievances)  or,  to  R-CUBE  and  Sellers'
          knowledge,   any   activity  or   proceeding   by  a  labor  union  or
          representative  thereof to  organize  any  employees  of R-CUBE or any
          campaign being conducted to solicit authorization from employees to be
          represented by the labor union; or
             
               (15) any  agreement  or  arrangement  made by  R-CUBE to take any
          action which,  if taken prior to the date hereof,  would have made any
          representation  or  warranty  set  forth in this  Agreement  untrue or
          incorrect unless otherwise disclosed.

          2.11 No Defaults.  R-CUBE is not in default under, and there exists no
     event,  condition or  occurrence  which,  after notice or lapse of time, or
     both, would constitute a default by R-CUBE under, any contract or agreement
     to which R-CUBE is a party and which would, if terminated or modified, have
     a Material Adverse Effect.

          2.12 Certain  Agreements.  Neither the  execution and delivery of this
     Agreement nor the consummation of the transactions contemplated hereby will
     (i)  result  in any  payment  (including,  without  limitation,  severance,
     unemployment  compensation,  golden parachute, bonus or otherwise) becoming
     due to any  director or employee  of R-CUBE from  R-CUBE,  under any of the
     R-CUBE  Employee  Plans,  R-CUBE Benefit  Arrangements  or otherwise,  (ii)
     materially  increase 
                                       7


<PAGE>

     any benefits  otherwise payable under any of the R-CUBE Employee Plans, the
     R-CUBE   Benefit   Arrangements   or  otherwise  or  (iii)  result  in  the
     acceleration of the time of payment or vesting of any benefits.

          2.13 Taxes.

               (1) For purposes of this Agreement, "Tax" or collectively "Taxes"
          means any and all federal, state, local and foreign taxes, assessments
          and other governmental charges,  duties,  impositions and liabilities,
          including  taxes  based upon or measured  by gross  receipts,  income,
          profits,  sales,  use and  occupation,  and value  added,  ad valorem,
          transfer,  franchise,  withholding,  payroll,  recapture,  employment,
          estimated,  excise and property  taxes,  together  with all  interest,
          penalties and additions  imposed with respect to those amounts and any
          obligations under any agreements or arrangements with any other person
          with respect to those amounts and including any liability for taxes of
          a predecessor entity.

               (2) Except as set forth in the Disclosure  Schedule:  

                         (i)   As of the Closing,  R-CUBE will have prepared and
                    filed  all  required  federal,  state,  local,  and  foreign
                    returns,  estimates,  information  statements,  and  reports
                    relating  to any and all  Taxes  ("Returns")  concerning  or
                    attributable  to R-CUBE that are  required to be filed by or
                    with respect to R-CUBE on or prior to the Closing,  and each
                    of the  Returns  shall be, to the  knowledge  of R-CUBE  and
                    Sellers,   true,  correct,  and  complete  in  all  material
                    respects and shall have been  completed in  accordance  with
                    applicable law;  

                         (ii)  As of the Closing,  R-CUBE: (A) will have paid or
                    accrued in accordance  with  generally  accepted  accounting
                    principles all Taxes  concerning or  attributable  to R-CUBE
                    relating  to  periods   ending  on  or  before  the  Closing
                    regardless of whether reflected on Returns and (B) will have
                    withheld  with  respect to their  employees  all federal and
                    state income taxes,  FICA, FUTA, and other Taxes required to
                    be withheld;

                         (iii) R-CUBE  has not been delinquent in the payment of
                    any  Tax  nor  is  there  any  Tax  deficiency  outstanding,
                    proposed or assessed against R-CUBE, nor has R-CUBE executed
                    any waiver of the statute of limitations on or extending the
                    period for the assessment or collection of any Taxes;

                         (iv)  No  audit or other  examination  of any Return of
                    R-CUBE  is  presently  in  progress,  nor  has  R-CUBE  been
                    notified of any request for an audit or examination;

                         (v)   R-CUBE  has no  liabilities  for unpaid  federal,
                    state,  local and foreign  Taxes which have not been accrued
                    or reserved in accordance with generally accepted accounting
                    principles on the R-CUBE Balance Sheet;

                         (vi)  R-CUBE  has made available to REI and its counsel
                    copies of all federal  and state  income and all state sales
                    and use Tax  Returns  for all  periods  ending  on or  after
                    December 31, 1995;

                                       8
<PAGE>


                         (vii) There  are (and as of  immediately  following the
                    Closing there will be) no liens, pledges,  charges,  claims,
                    security  interests,  or  other  encumbrances  of  any  sort
                    ("Liens") on the assets of R-CUBE  relating or  attributable
                    to Taxes  other than liens for sales and  payroll  taxes not
                    yet due and payable;
                        
                         (viii) R-CUBE has no knowledge of any reasonable  basis
                    for the assertion of any claim relating or  attributable  to
                    Taxes which,  if adversely  determined,  would result in any
                    Lien on the assets of R-CUBE;

                         (ix)  None  of the assets of R-CUBE is property that is
                    required to be treated as owned by any other person pursuant
                    to the "safe harbor lease" provisions of former Code Section
                    168(f)(8),  and none of the assets is treated as "tax-exempt
                    use property" within the meaning of Code Section 168(h);

                         (x)   R-CUBE has not filed any consent  agreement under
                    Code Section  341(f) or agreed to have Code  Section  341(f)
                    apply to any  disposition  of a  "subsection  (f) asset" (as
                    defined in Code Section 341(f)(4)) owned by R-CUBE;

                         (xi)  R-CUBE    has   not   been    included   in   any
                    "consolidated," "unitary," or "combined" Return provided for
                    under the law of the United  States or any state or locality
                    with respect to Taxes for any taxable period;
        
                         (xii) R-CUBE   is  not  a  party  to  a  tax   sharing,
                    allocation,   indemnification   or  similar   agreement   or
                    arrangement,  and R-CUBE  does not owe any amount  under any
                    agreement or arrangement;

                         (xiii)  No  Return  of  R-CUBE  contains  a  disclosure
                    statement under Code Section 6662 (or predecessor provision)
                    or any similar provision of state, local, or foreign law;

                         (xiv) R-CUBE  is not  and has  not  been at any  time a
                    "United States real property holding corporation" within the
                    meaning of Code Section 897(c)(2);

                         (xv)  No  indebtedness of R-CUBE consists of "corporate
                    acquisition indebtedness" within the meaning of Code Section
                    279;

                         (xvi) R-CUBE has not taken any action not in accordance
                    with past  practice  that would have the effect of deferring
                    any Tax liability of R-CUBE from any period ending on before
                    the Closing  Date to any  taxable  period  ending  after the
                    Closing Date;

                         (xvii)  R-CUBE was not acquired in a  "qualified  stock
                    purchase"  under Code  Section  338(d)(3),  and no elections
                    under  Code  Section  338(g),   protective  carryover  basis
                    elections, or offset prohibition elections are applicable to
                    R-CUBE or any predecessor corporations; and

                                        9
 
<PAGE>

                        (xviii)  The tax  bases of the  assets  of  R-CUBE  for
                    purposes of determining future  amortization,  depreciation,
                    and other  federal  income  tax  deductions  are  accurately
                    reflected on the tax books and records of R-CUBE.

          2.14 Intellectual Property. There are no patents, patent applications,
     trademarks,  service marks, trademark and service mark applications,  trade
     names and copyrights  material to the lawful and efficient operation of the
     business of R-CUBE as presently  conducted and as presently  proposed to be
     conducted.

          2.15  Fees  and  Expenses.  Except  as set  forth  on  the  Disclosure
     Schedule,  neither R-CUBE nor Sellers have paid or become  obligated to pay
     any fee or commission to any broker,  finder or  intermediary in connection
     with the  transactions  contemplated by this Agreement.  Sellers agree that
     any such fees or commissions  described in the preceding  sentence shall be
     the sole responsibility of Sellers, whether or not the Closing occurs.

          2.16 Environmental Matters.

               (1) To R-CUBE's and Seller's knowledge, none of the properties or
          facilities  of R-CUBE is in violation  of any federal,  state or local
          law, ordinance,  regulation or order relating to industrial hygiene or
          to the  environmental  conditions on, under or about the properties or
          facilities,  including,  but not  limited  to,  soil and ground  water
          condition  except where the violations would not constitute a Material
          Adverse  Effect.  During the time that  R-CUBE has owned or leased its
          properties  and  facilities,  neither  R-CUBE  nor,  to  R-CUBE's  and
          Sellers' knowledge,  any third party, has released,  used,  generated,
          manufactured or stored on, under or about the properties or facilities
          or  transported  to or from the properties or facilities any hazardous
          materials.

               (2)  During  the  time  that  R-CUBE  has  owned  or  leased  its
          properties  and  facilities,  there has been no litigation  brought or
          threatened  against  R-CUBE  by, or any  settlement  reached by R-CUBE
          with, any party or parties alleging the presence, disposal, release or
          threatened release of any hazardous materials on, from or under any of
          the properties or facilities.

          2.17 [Intentionally Omitted].

          2.18  Disclosure.  No  representation  or  warranty  made by R-CUBE or
     Sellers  in this  Agreement  or the  Other  Agreements,  nor any  document,
     written information, written statement, financial statement, certificate or
     exhibit  prepared and furnished or to be prepared and furnished by Sellers,
     R-CUBE or their  representatives  pursuant to this  Agreement  or the Other
     Agreements or in connection with the  transactions  contemplated  hereby or
     thereby,  when taken together,  contains any untrue statement of a material
     fact, or omits to state a material fact necessary to make the statements or
     facts  contained   herein  or  therein  not  misleading  in  light  of  the
     circumstances under which they were furnished.

          2.19  Restrictions  on  Business  Activities.  There  is  no  material
     agreement,  judgment,  injunction, order or decree binding upon R-CUBE that
     has or could  reasonably be expected to have the effect of  prohibiting  or
     materially  impairing any business  practice of R-CUBE,  

                                       10
<PAGE>

     any  acquisition of property by R-CUBE or the conduct of business by R-CUBE
     as currently conducted.

          2.20 Accounts Receivable.  The accounts receivable shown on the R-CUBE
     Balance Sheet as of the R-CUBE  Balance Sheet Date, or thereafter  acquired
     prior  to the  date  hereof,  have  been  and  are  (as  the  case  may be)
     collectible  within 120 days from the Closing Date in amounts not less than
     the aggregate amounts thereof carried on the books of R-CUBE reduced by the
     reserves for discounts and bad debts taken on the R-CUBE Balance Sheet.

          2.21 Personal  Property.  R-CUBE has good title, free and clear of all
     title defects, objections and liens, including without limitation,  leases,
     chattel  mortgages,   conditional  sales  contracts,   collateral  security
     arrangements and other title or interest-retaining  arrangements, to all of
     its machinery, equipment, furniture, inventory and other personal property.
     All personal  property used in the business of R-CUBE is in good  operating
     condition.  All of the leases to personal property utilized in the business
     of R-CUBE are valid and  enforceable  against R-CUBE and are not in default
     by R-CUBE, or, to the knowledge of R-CUBE or Sellers,  are any of the other
     parties thereto in default thereof.

          2.22  Real  Property.  R-CUBE  does  not own any  real  property.  The
     Disclosure  Schedule  contains a list of all leases  for real  property  to
     which  R-CUBE is a party,  the square  footage  leased with respect to each
     lease and the  expiration  date of each lease.  These  leases are valid and
     enforceable and are not in default. To the knowledge of R-CUBE and Sellers,
     the real property leased or occupied by R-CUBE,  the  improvements  located
     thereon,  and  the  furniture,  fixtures  and  equipment  relating  thereto
     (including  plumbing,  heating,  air conditioning and electrical  systems),
     conform to any and all applicable health,  fire, safety,  zoning,  land use
     and building  laws,  ordinances and  regulations.  There are no outstanding
     contracts  made by R-CUBE for any  improvements  made to the real  property
     leased or occupied by R-CUBE that have not been paid for.

          2.23 Warranties.  R-CUBE has made no warranties or guarantees relating
     to its  services  other than as implied or required  by law.  R-CUBE has no
     warranty  or  indemnification  obligations  relating  to  patents  or other
     proprietary rights.

          2.24  Contracts.  The  Disclosure  Schedule  lists all oral or written
     agreements,  notes,  instruments or contracts to which R-CUBE is a party or
     by which its assets or properties may be bound which involve the payment or
     receipt of more than $25,000 (on an annual basis),  or which have a term of
     more than one year, or which involve  intellectual  property,  or which are
     employment or consulting agreements ("R-CUBE Contracts").  R-CUBE is not in
     default in performance of its obligations under any material  provisions of
     the R-CUBE Contracts.  Neither R-CUBE nor Sellers have any knowledge of any
     violation  of or  default  under any  R-CUBE  Contract  by any other  party
     thereto  or any  knowledge  of any  intent by any other  party to an R-CUBE
     Contract not to perform its obligations under any R-CUBE Contract.

          2.25 No  Goods or  Products.  R-CUBE  does not and has not  developed,
     sold, marketed or distributed any goods or products.

                                       11

<PAGE>

     3.   REPRESENTATIONS AND WARRANTIES OF REI.

          REI hereby represents and warrants to R-CUBE and Seller that:

          3.1  Organization;  Good Standing;  Qualification  and Power. REI is a
     corporation  duly  incorporated,  organized,  validly  existing and in good
     standing under the laws of the jurisdiction of its  incorporation,  has all
     requisite  corporate  power and  authority  to own,  lease and  operate its
     properties and to carry on its business as now being conducted, and is duly
     qualified and in good standing to do business in each jurisdiction in which
     the nature of its business or the  ownership  or leasing of its  properties
     makes  qualification  necessary,  other  than in  jurisdictions  where  the
     failure to qualify would not have a Material  Adverse Effect.  REI has made
     available  to R-CUBE or its  counsel  complete  and  correct  copies of the
     certificate of incorporation  and bylaws of REI, in each case as amended to
     the date of this  Agreement,  and  copies of all  minutes of  meetings  and
     actions by written consent of shareholders,  directors and board committees
     of REI.

          3.2 Capital Structure.

               3.2.1 Stock,  Options and Warrants.  The authorized capital stock
          of REI consists of 20,000,000  shares of common stock,  $.01 par value
          per share ("REI  Common  Stock"),  and  5,000,000  shares of Preferred
          Stock, $.01 par value per share ("REI Preferred Stock").  At the close
          of business on January 13, 1999,  5,680,710 shares of REI Common Stock
          were issued and  outstanding,  and 599,850  shares of REI Common Stock
          were  reserved for issuance upon the exercise of  outstanding  options
          ("REI  Options") and warrants ("REI  Warrants") to purchase REI Common
          Stock. No shares of REI Preferred Stock are issued or outstanding. All
          outstanding shares of REI Common Stock are validly issued,  fully paid
          and nonassessable and not subject to preemptive  rights.  REI has made
          available to R-CUBE true and correct copies of its 1996, 1997 and 1998
          Stock  Option  Plans  (each an "REI Plan" and  collectively,  the "REI
          Plans").

               3.2.2 No Other  Commitments.  Except for the REI  Options and REI
          Warrants  disclosed  in or  pursuant  to Section  3.2.1,  there are no
          options,  warrants, calls, rights,  commitments,  conversion rights or
          agreements of any character to which REI is a party or by which REI is
          bound obligating REI to issue, deliver or sell, or cause to be issued,
          delivered or sold,  any shares of capital  stock of REI or  securities
          convertible  into or exchangeable  for shares of capital stock of REI,
          or  obligating  REI to grant,  extend or enter  into any such  option,
          warrant, call, right, commitment, conversion right or agreement. There
          are no voting trusts or other  agreements or  understandings  to which
          REI is a party with respect to the voting of the capital stock of REI.

          3.3 Authority.

               3.3.1 Corporate Action. REI has all requisite corporate power and
          authority to enter into this Agreement and to perform its  obligations
          hereunder  and to consummate  the  transactions  contemplated  by this
          Agreement. The execution and delivery of this Agreement by REI and the
          consummation by REI of the transactions  contemplated hereby have been
          duly authorized by all necessary  corporate action on the part of REI.
          This  Agreement  has been duly executed and delivered by REI, and this
          Agreement is the valid and binding  obligation of REI,  enforceable in
        
                                       12
<PAGE>

          accordance with its terms,  except that  enforceability may be subject
          to (i) bankruptcy,  insolvency,  reorganization  or other similar laws
          affecting or relating to  enforcement of creditors'  rights  generally
          and (ii) general equitable principles.

               3.3.2  No   Conflict.   Neither  the   execution,   delivery  and
          performance  of  this   Agreement,   nor  the   consummation   of  the
          transactions  contemplated  hereby nor compliance  with the provisions
          hereof will conflict  with, or result in any violations of, or cause a
          default (with or without  notice or lapse of time, or both) under,  or
          give  rise to a  right  of  termination,  amendment,  cancellation  or
          acceleration  of any  obligation  contained  in,  or the  loss  of any
          material  benefit  under,  or  result  in the  creation  of any  lien,
          security  interest,  charge or  encumbrance  upon any of the  material
          properties or assets of REI under, any term, condition or provision of
          (x) the certificate of  incorporation or bylaws of REI or (y) any loan
          or credit agreement,  note, bond, mortgage,  indenture, lease or other
          material agreement,  judgment, order, decree, statute, law, ordinance,
          rule or regulation  applicable to REI or its respective  properties or
          assets, other than any such conflicts,  violations,  defaults, losses,
          liens, security interests, charges or encumbrances which, individually
          or in the aggregate, would not have a Material Adverse Effect.

               3.3.3  Governmental  Consents.  No  consent,  approval,  order or
          authorization  of, or  registration,  declaration  or filing with, any
          Governmental  Entity is required  to be obtained by REI in  connection
          with the execution and delivery of this Agreement or the  consummation
          of the transactions contemplated hereby.

          3.4 SEC Documents.

               3.4.1  SEC  Reports.  REI has made  available  to  R-CUBE  or its
          counsel  correct  and  complete  copies  of  each  report,   schedule,
          registration  statement and definitive  proxy  statement  filed by REI
          with  the  Securities  and  Exchange  Commission  ("SEC")  on or after
          January 1, 1997  ("REI SEC  Documents"),  which are all the  documents
          (other than  preliminary  material) that REI was required to file with
          the SEC on or after that date. As of their respective dates or, in the
          case of registration statements,  their effective dates (or if amended
          or superseded by a filing prior to the date of this Agreement, then on
          the date of such filing), none of the REI SEC Documents (including all
          exhibits and schedules thereto and documents incorporated by reference
          therein)  contained any untrue statement of a material fact or omitted
          to state a material fact required to be stated therein or necessary in
          order to make the statements  therein,  in light of the  circumstances
          under which they were made, not misleading,  and the REI SEC Documents
          complied when filed in all material  respects with the then applicable
          requirements  of the Securities Act or the Securities  Exchange Act of
          1934,  as amended,  as the case may be, and the rules and  regulations
          promulgated  by the SEC  thereunder.  REI has filed all  documents and
          agreements  which were required to be filed as exhibits to the REI SEC
          Documents.

               3.4.2  Financial  Statements.  The  financial  statements  of REI
          included in the REI SEC Documents  complied as to form in all material
          respects  with the then  applicable  accounting  requirements  and the
          published rules and regulations of the SEC with respect thereto,  were
          prepared in accordance with generally accepted  accounting  principles
          applied on a consistent  basis during the periods  involved (except as
          may have been  indicated  in the notes  thereto or, in the case of the
          unaudited  statements,  as permitted by Form 10-QSB promulgated by the
          SEC)  and  fairly  

                                       13
<PAGE>

          present  the  financial  position  of REI as at the  respective  dates
          thereof  and the  results  of its  operations  and cash  flows for the
          respective periods then ended.

          3.5 Litigation.  There is no suit, action, arbitration,  demand, claim
     or proceeding pending or, to the best knowledge of REI,  threatened against
     REI in connection with or relating to the transactions contemplated by this
     Agreement or of any action taken or to be taken in  connection  herewith or
     the consummation of the transactions contemplated hereby.

          3.6 Fees and Expenses. REI has not paid or become obligated to pay any
     fee or commission to any broker,  finder or intermediary in connection with
     the transactions contemplated by this Agreement.

          3.7  Disclosure.  No  representation  or warranty  made by REI in this
     Agreement,  nor  any  document,  written  information,  written  statement,
     financial  statement,  certificate or exhibits prepared and furnished or to
     be prepared and furnished by REI or its representatives  pursuant hereto or
     in  connection  with  the  transactions  contemplated  hereby,  when  taken
     together,  contains any untrue  statement of a material  fact,  or omits to
     state a material fact necessary to make the  statements or facts  contained
     herein or therein not misleading in light of the circumstances  under which
     they were furnished.

          3.8 Financial  Capacity.  REI has the financial  capability to pay the
     Purchase Price when due.

      4.  R-CUBE AND SELLERS' COVENANTS.

          4.1  Notification of Changes.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in  accordance  with its terms,  R-CUBE and Sellers will promptly
     notify REI in writing (a) of any event occurring  subsequent to the date of
     this Agreement that would render any  representation  or warranty of R-CUBE
     or any Seller contained in this Agreement or the Other Agreements,  if made
     on or as of the date of the event or the Closing Date, untrue or inaccurate
     in any material respect,  (b) of any Material Adverse Effect and (c) of any
     breach by R-CUBE or any Seller of any  covenant or  agreement  contained in
     this Agreement or the Other Agreements.

          4.2  Maintenance of Business.  During the period from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance  with its terms,  R-CUBE and Sellers will use their
     reasonable  commercial  efforts to carry on and preserve  R-CUBE's business
     and its relationships  with customers,  suppliers,  employees and others in
     substantially the same manner as it has prior to the date hereof. If R-CUBE
     or  any  Seller  becomes  aware  of  any  material   deterioration  in  the
     relationship with any material customer, material supplier or key employee,
     R-CUBE or that Seller will promptly bring that information to the attention
     of REI.

          4.3  Conduct of  Business.  During  the  period  from the date of this
     Agreement  until the earlier of the Closing Date or the termination of this
     Agreement in accordance with its terms, R-CUBE will, and Sellers will cause
     R-CUBE to,  continue to conduct its  business  and  maintain  its  

                                       14
<PAGE>

     business  relationships  in the  ordinary  and usual  course  and will not,
     without the prior written consent of REI:

               (1)  borrow  any money  except  for  amounts  that are not in the
          aggregate  material to the financial  condition of R-CUBE,  taken as a
          whole;

               (2)  enter  into any  material  transaction  not in the  ordinary
          course of its business;

               (3) encumber or permit to be encumbered  any of its assets except
          in the ordinary course of its business;

               (4) dispose of any of its assets except in the ordinary course of
          business consistent with past practice;

               (5) enter into any material lease or contract for the purchase or
          sale or  license  of any  property,  real or  personal,  except in the
          ordinary course of business;

               (6) fail to  maintain  its  equipment  and  other  assets in good
          working condition and repair according in all material respects to the
          standards it has  maintained  to the date of this  Agreement,  subject
          only to ordinary wear and tear;

               (7)  pay  (or   make   any  oral  or   written   commitments   or
          representations  to  pay)  any  bonus,  increased  salary  or  special
          remuneration to any officer, employee or consultant (except for normal
          salary increases  consistent with past practices not to exceed 10% per
          year) or enter into or vary the terms of any employment, consulting or
          severance  agreement with any person, pay any severance or termination
          pay (other than payments  made in accordance  with plans or agreements
          existing  on the date  hereof),  grant any  stock  option or issue any
          restricted stock, or enter into or modify any agreement or plan of the
          type described in Section 2.8;

               (8) change accounting methods;

               (9) declare, set aside or pay any cash or stock dividend or other
          distribution  in  respect  of capital  stock,  or redeem or  otherwise
          acquire any of its capital stock (other than pursuant to  arrangements
          with  terminated  employees or consultants  in the ordinary  course of
          business consistent with R-CUBE's past practice);

               (10) amend or  terminate  any  material  contract,  agreement  or
          license to which it is a party except those  amended or  terminated in
          the  ordinary  course of its  business,  or which are not  material in
          amount or effect;

               (11) alter in any way its manner of paying  payables,  collecting
          receivables or ordering products and services;

               (12) lend any  amount to any  person or  entity,  other  than (i)
          advances  for travel and  expenses  which are incurred in the ordinary
          course of business  consistent  with past  

                                       15


<PAGE>

          practice,  not material in amount and  documented  by receipts for the
          claimed amounts, or (ii) any loans pursuant to any R-CUBE 401(a) Plan;

               (13) guarantee or act as a surety for any obligation,  except for
          obligations in amounts that are not material;

               (14) waive or release any right or claim except for the waiver or
          release of  non-material  claims in the  ordinary  course of business,
          consistent  with past  practice  or the waiver or release of rights or
          claims set forth in the Disclosure Schedule;

               (15) issue or sell any shares of its  capital  stock of any class
          or any  other of its  securities,  or issue or  create  any  warrants,
          obligations,  subscriptions,  options, convertible securities or other
          commitments  to issue  shares of  capital  stock,  or  accelerate  the
          vesting of any outstanding option or other security;

               (16) split or combine the outstanding shares of its capital stock
          of any class or enter into any recapitalization or agreement affecting
          the number or rights of outstanding shares of its capital stock of any
          class or affecting any other of its securities;

               (17)  merge,  consolidate  or  reorganize  with,  or acquire  any
          entity;

               (18) conduct any  negotiations or agreements of any kind with any
          other  parties  with  respect to the sale of the assets or the capital
          stock of R-CUBE,  or for the  merger or sale of R-CUBE  with or to any
          other entity;

               (19) amend its articles of incorporation or bylaws;

               (20) license any intellectual property rights of R-CUBE except in
          the ordinary course of business consistent with past practice;

               (21) agree to any audit assessment by any tax authority;

               (22) change any insurance coverage; or

               (23) agree to do any of the  things  described  in the  preceding
          clauses in this Section 4.3.

          4.4 Regulatory  Approvals.  R-CUBE will promptly  execute and file, or
     join in the execution and filing of, any application or other document that
     may be necessary in order to obtain the authorization,  approval or consent
     of any governmental body,  federal,  state, local or foreign,  which may be
     required,  or which REI may  reasonably  request,  in  connection  with the
     consummation of the  transactions  contemplated  by this Agreement.  R-CUBE
     will use its reasonable efforts to promptly obtain all such authorizations,
     approvals and consents.

          4.5 Necessary Consents. During the term of this Agreement, R-CUBE will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 

                                       16

<PAGE>

     or  appropriate  in addition to those set forth in Section 4.4 to allow the
     consummation of the transactions contemplated hereby.

          4.6 Access to  Information.  Upon the  execution of a  confidentiality
     agreement, the form and substance of which is mutually acceptable to R-CUBE
     and REI, R-CUBE and Sellers will allow REI and its agents reasonable access
     to the files,  books,  records  and offices of R-CUBE,  including,  without
     limitation,   any  and  all   information   relating  to  R-CUBE's   taxes,
     commitments,  contracts, leases, licenses and real, personal and intangible
     property and financial  condition.  R-CUBE and Sellers will cause  R-CUBE's
     accountants to cooperate with REI and its agents in making available to REI
     all  financial  information   reasonably  requested,   including,   without
     limitation,  the right to examine all working papers  pertaining to all tax
     returns and financial statements prepared or reviewed by the accountants.

          4.7  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  R-CUBE and Sellers  will use  reasonable  efforts to satisfy or
     cause to be satisfied all the  conditions  precedent  that are set forth in
     Sections  10 and 11,  and  R-CUBE  and  Sellers  will use their  reasonable
     efforts to cause the  transactions  contemplated  by this  Agreement  to be
     consummated.

          4.8  Confidentiality.  All  information  concerning  REI or any of its
     subsidiaries ("REI  Subsidiaries")  received by R-CUBE or any Seller (other
     than that  information  which is a matter of public  knowledge or which has
     been published for public  distribution or filed as public information with
     any  governmental  authority)  shall not at any time,  except in connection
     with this Agreement and the transactions  contemplated  hereby, be used for
     the advantage of, or disclosed by, R-CUBE or any Seller to any third person
     without the prior written  consent of REI.  R-CUBE and Sellers may disclose
     the  information on a confidential  basis to their  affiliates,  employees,
     officers,  agents,  auditors,  investment  bankers,  consultants,  counsel,
     directors,   present  and  prospective   lenders,  and  state  and  federal
     regulatory  agencies.  This  covenant  shall  expire on  completion  of the
     Closing;  provided,  however,  that if the Closing does not occur, it shall
     expire three years after the date of this Agreement.

          4.9 Cooperation in Review of R-CUBE Financial  Statements.  R-CUBE and
     Sellers shall  cooperate  fully with REI and its  representatives  in their
     review of the R-CUBE  Financial  Statements  and the Final  Balance  Sheet,
     including  providing  access to the information  referred to in Section 4.6
     and any other information necessary in order to complete their review.

      5.  REI COVENANTS

          5.1 Regulatory Approvals.  REI will promptly execute and file, or join
     in the execution and filing of, any  application or other document that may
     be necessary in order to obtain the  authorization,  approval or consent of
     any  governmental  body,  federal,  state,  local or  foreign  which may be
     required,  or which R-CUBE may reasonably  request,  in connection with the
     consummation of the transactions  contemplated by this Agreement.  REI will
     use its  reasonable  efforts to  promptly  obtain all such  authorizations,
     approvals and consents.

          5.2 Necessary  Consents.  During the term of this Agreement,  REI will
     use its  reasonable  efforts to obtain such written  consents and take such
     other actions as may be necessary 
                                       17

<PAGE>

     or  appropriate  in addition to those set forth in Section 5.1 to allow the
     consummation of the transactions contemplated hereby.

          5.3  Satisfaction  of  Conditions  Precedent.  During the term of this
     Agreement,  REI will use its  reasonable  efforts to satisfy or cause to be
     satisfied all the conditions precedent that are set forth in Sections 9 and
     11,  and REI will use its  reasonable  efforts  to cause  the  transactions
     contemplated by this Agreement to be consummated.

          5.4 Confidentiality. All information concerning R-CUBE received by REI
     (other than that information which is a matter of public knowledge or which
     has been published for public  distribution or filed as public  information
     with  any  governmental  authority)  shall  not  at  any  time,  except  in
     connection with this Agreement and the transactions contemplated hereby, be
     used for the advantage of, or disclosed by, REI to any third person without
     the prior written consent of R-CUBE.  REI may disclose the information on a
     confidential  basis  to  its  affiliates,   employees,   officers,  agents,
     auditors, investment bankers, consultants,  counsel, directors, present and
     prospective  lenders,  and state and federal  regulatory  agencies  and, as
     provided  elsewhere in this  Agreement,  may disclose such  information  in
     press  releases  and  like  disclosures,  filings  with  the  SEC or  other
     governmental or  self-regulatory  agencies or as otherwise  required.  This
     covenant shall expire on completion of the Closing; provided, however, that
     if the Closing  does not occur,  it shall expire three years after the date
     of this Agreement.

      6.  EMPLOYEE MATTERS

          Following  the  Closing,  all  employees  of R-CUBE  will  either  (i)
     continue to be employees of R-CUBE or (ii) be offered employment by REI. In
     either case, those employees will be provided  employment benefits that are
     at least  comparable  to those they  currently  receive from R-CUBE and, if
     necessary,  R-CUBE or REI shall continue to sponsor those employees for the
     purpose of maintaining such employees' United States resident alien status.
     Notwithstanding  the foregoing,  REI makes no  representation,  warranty or
     promise as to the length of time that any such  employee will remain in the
     employ of R-CUBE or REI following the Closing.

                                       18

<PAGE>

      7.  INDEMNIFICATION OF THE PARTIES.

          7.1 Indemnification by Sellers

               (1) Sellers  shall,  jointly and  severally,  indemnify,  defend,
          protect and hold harmless REI, R-CUBE,  each of the REI  Subsidiaries,
          each of their  respective  successors  and  assigns  and each of their
          respective directors, officers, employees, agents and affiliates (each
          an "REI  Indemnified  Party"),  against all losses,  claims,  damages,
          actions, suits, proceedings, demands, assessments,  adjustments, costs
          and  expenses   (including   specifically,   but  without  limitation,
          reasonable  attorneys' fees and expenses of investigation  ("Losses"))
          based upon,  resulting  from or arising out of (i) any  inaccuracy  or
          breach  of  any  representation  or  warranty  of  R-CUBE  or  Sellers
          contained in or made in connection with this  Agreement,  and (ii) the
          breach by R-CUBE or Sellers of, or the failure by R-CUBE or Sellers to
          observe,  any  of  their  respective  covenants  or  other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.1  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          REI under  this  Section  7.1  thereafter);  provided,  however,  that
          Sellers  shall  indemnify  REI for any and all  Taxes  incurred  by or
          attributable to R-CUBE prior to the Closing,  and the  indemnification
          period  relating to any Taxes shall  terminate  on the tenth day after
          the expiration of the applicable  period of limitations on assessments
          and  collections  applicable to such taxes under the Internal  Revenue
          Code of 1986.

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by  Seller  under  Section  7.1(a)  shall not  exceed  50% of the
          Purchase  Price as  adjusted  pursuant  to Section  1.3 and net of any
          insurance  proceeds  received by REI, and Seller shall not be required
          to indemnify,  defend,  protect and hold  harmless an REI  Indemnified
          Party  pursuant  to  Section  7.1(a)  for  Losses  incurred  by an REI
          Indemnified  Party  with  respect to any  inaccuracy  or breach of any
          representation or warranty of R-CUBE or Sellers contained in Section 2
          of this  Agreement  or the  Other  Agreements  unless  and  until  the
          aggregate amount of such Losses exceeds $25,000, at which time the REI
          Indemnified  Parties  shall be entitled to  indemnification  hereunder
          with respect to all such  aggregate  amount of Losses  (including  the
          first  $25,000 of Losses) and any Losses  incurred or suffered by them
          thereafter.

          7.2 Indemnification by REI

               (1) REI  shall  indemnify,  defend,  protect  and  hold  harmless
          Sellers (each a "Seller  Indemnified  Party") against all Losses based
          upon, resulting from or arising out of (i) any inaccuracy or breach of
          any  representation,  or  warranty  of REI  contained  in or  made  in
          connection with this Agreement,  and (ii) the breach by REI of, or the
          failure by REI to observe,  any of its  covenants or other  agreements
          contained  in  or  made  in  connection  with  this   Agreement.   The
          indemnification  provided  for in this  Section  7.2  shall  terminate
          twelve  months  after the Closing Date (and no claims shall be made by
          Sellers under this Section 7.2 thereafter).

               (2)  Notwithstanding  the foregoing,  the aggregate  amount to be
          paid by REI under Section  7.2(a) shall not exceed 50% of the Purchase
          Price as adjusted  per Section 1.3 and net of any  insurance  proceeds
          received  by  Sellers,  and REI shall not be  required  to  indemnify,
          defend,  protect and hold harmless a Seller Indemnified Party pursuant
          to Section 7.2(a) for Losses  

                                       19

<PAGE>

          incurred by a Seller  Indemnified Party with respect to any inaccuracy
          or breach of any  representation  or warranty of REI contained in this
          Agreement unless and until the aggregate amount of such Losses exceeds
          $25,000,  at  which  time  the  Seller  Indemnified  Parties  shall be
          entitled  to  indemnification  hereunder  with  respect  to  all  such
          aggregate amount of Losses (including the first $25,000 of Losses) and
          any Losses incurred or suffered by them thereafter.

          7.3 Manner of Indemnification.  All indemnification under this Section
     7 shall be effected by the payment of cash or delivery of a bank  cashier's
     check, or by a combination of the foregoing.

      8.  CLOSING.

          8.1 Closing  Date.  Subject to the  termination  of this  Agreement as
     provided  in Section 12, the closing of the  transactions  contemplated  by
     this Agreement ("Closing") will take place at the offices of Rutan & Tucker
     LLP,  611 Anton,  Suite  1400,  Costa  Mesa,  California  92626 on the date
     following  satisfaction  of all  conditions set forth in Sections 9, 10 and
     11,  which  date  shall be  within  30 days of the date of this  Agreement,
     unless another place, time and date is selected by R-CUBE and REI ("Closing
     Date").

          8.2  Deliveries by R-CUBE and Sellers at the Closing.  At the Closing,
     R-CUBE and Sellers shall deliver to REI:

               (1) Certificates representing all of the Shares, free of liens or
          encumbrances, accompanied by duly executed stock powers by each Seller
          in favor of REI with all necessary  transfer stamps affixed thereto or
          other evidence of payment of applicable stock transfer taxes, if any;

               (2) The Final Balance Sheet;

               (3)  The  officers'  and  Sellers'  certificates  referred  to in
          Sections 10.1, 10.2 and 10.4; and

               (4) The opinion referred to in Section 10.7.

          8.3 Delivery by REI at the Closing. At the Closing,  REI shall deliver
     to  Seller  a  cashier's  check  or  evidence  of wire  transfer  of  funds
     representing the Purchase Price for the Seller's Shares.

      9.  CONDITIONS PRECEDENT TO OBLIGATIONS OF R-CUBE AND SELLER.

          The  obligations  of R-CUBE and Seller  hereunder  are  subject to the
     fulfillment  or  satisfaction  on or  before  the  Closing  of  each of the
     following  conditions (any one of which may be waived by R-CUBE and Seller,
     but only in a writing signed by R-CUBE and Seller):

          9.1 Accuracy of Representations and Warrants.  The representations and
     warranties  of REI set  forth in  Section 3 shall be true and  accurate  in
     every  material  respect on and 

                                       20

<PAGE>

     as of the  Closing  Date with the same force and effect as if they had been
     made at the Closing except to the extent the failure of the representations
     and  warranties  to be true and  accurate in such  respects has not had and
     could not  reasonably be expected to have a Material  Adverse  Effect,  and
     R-CUBE shall receive a certificate  to that effect  executed by REI's Chief
     Executive Officer and Chief Financial Officer.

          9.2  Covenants.  REI shall have performed and complied in all material
     respects  with all of its  covenants  required to be  performed by it under
     this  Agreement  on or before  the  Closing,  and  R-CUBE  shall  receive a
     certificate  to that  effect  signed by REI's Chief  Executive  Officer and
     Chief Financial Officer.

          9.3 Compliance with Law. There shall be no order,  decree or ruling of
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

      10. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI.

          The  obligations  of REI hereunder are subject to the  fulfillment  or
     satisfaction on or before the Closing, of each of the following  conditions
     (any one or more of  which  may be  waived  by REI,  but only in a  writing
     signed by REI).

          10.1 Accuracy of Representations and Warrants. The representations and
     warranties  of R-CUBE and Sellers set forth in Section 2 of this  Agreement
     and the  Other  Agreements  shall be true and  accurate  in every  material
     respect on and as of the Closing  Date with the same force and effect as if
     they had been made at the  Closing  except to the extent the failure of the
     representations and warranties to be true and accurate in such respects has
     not had and could not  reasonably  be expected  to have a Material  Adverse
     Effect, and REI shall receive  certificates to that effect executed by each
     Seller and by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.2  Covenants.  R-CUBE and Sellers shall have performed and complied
     in all  material  respects  with  all of  their  covenants  required  to be
     performed  by them  under this  Agreement  and the Other  Agreements  on or
     before the  Closing,  and REI shall  receive  certificates  to that  effect
     signed by each Seller and by  R-CUBE's  Chief  Executive  Officer and Chief
     Financial Officer.

          10.3  Completion of Due  Diligence.  REI shall have  conducted its due
     diligence  investigation of R-CUBE and shall have  determined,  in its sole
     and absolute discretion,  that the business,  records,  assets,  contracts,
     liabilities,  operations  and other  aspects of the business of R-CUBE (the
     "Business Aspects") are satisfactory to REI in all respects. REI shall have
     seven days (the  "Initial  Diligence  Period")  following  the date of this
     Agreement  to use its  reasonable  efforts  to  perform  its due  diligence
     investigation  of R-CUBE.  If, at the expiration of such Initial  Diligence
     Period,  REI shall request  additional  time to complete its due diligence,
     R-CUBE  and  Sellers  may  promptly  grant or deny  such  request  in their
     reasonable  discretion.  If such  request is granted,  it shall allow REI a
     minimum of three additional working days (the "Extension Diligence Period")
     to complete its due diligence investigation.  Within two days following the
     expiration  of the Initial  

                                       21

<PAGE>

     Diligence  Period and the  Extension  Diligence  Period,  if any, REI shall
     notify  R-CUBE  and  Sellers  as to  whether,  in REI's  sole and  absolute
     discretion, the Business Aspects are satisfactory to REI in all respects.

          10.4 Absence of Material Adverse Change. There shall not have been any
     material  adverse  change  in  the  condition   (financial  or  otherwise),
     properties,  assets,  liabilities,   businesses,   operations,  results  of
     operations or prospects of R-CUBE,  taken as a whole,  other than:  (a) any
     adverse effect resulting from conditions affecting the engineering software
     industry as a whole or the United States economy as a whole;  (b) a failure
     by R-CUBE to meet  internal  earnings  or revenue  projections;  or (c) any
     disruption of customer or supplier  relationships  arising primarily out of
     or  resulting  primarily  from  actions  contemplated  by  the  parties  in
     connection with, or which is primarily  attributable to the announcement of
     this  Agreement and the  transactions  contemplated  hereby,  to the extent
     attributable  thereto,  and REI shall receive a certificate  to that effect
     executed by R-CUBE's Chief Executive Officer and Chief Financial Officer.

          10.5 Compliance with Law. There shall be no order, decree or ruling by
     any governmental  agency or written threat thereof,  or any statute,  rule,
     regulation or order enacted,  entered, enforced or deemed applicable to the
     transactions contemplated by this Agreement, which would prohibit or render
     illegal the transactions contemplated by this Agreement.

          10.6  Documents.   REI  shall  have  received  all  written  consents,
     assignments,  waivers,  authorizations  or  other  certificates  reasonably
     deemed  necessary by REI to provide for the  continuation in full force and
     effect of any and all  material  contracts  and  leases  of R-CUBE  and for
     R-CUBE to consummate the transactions  contemplated  hereby except when the
     failure to receive the consents,  etc.,  would not have a Material  Adverse
     Effect.

          10.7  Corporate  Opinion.  REI shall  have  received  the  opinion  of
     R-CUBE's   corporate   legal  counsel  based  upon   reasonably   requested
     certifications  as to factual  matters and dated the Closing Date regarding
     the status and authority of R-CUBE, the authorization of this Agreement and
     the transactions  contemplated  hereby by R-CUBE, and the binding effect of
     this Agreement on R-CUBE and Sellers.  The opinion shall be satisfactory to
     REI.

          10.8 Other Agreements. The closing of the Other Agreements shall occur
     simultaneously with the Closing of this Agreement.

      11. CONDITIONS PRECEDENT TO OBLIGATIONS OF REI, R-CUBE AND SELLER.

          The  obligations of REI,  R-CUBE and Sellers  hereunder are subject to
     the fulfillment or  satisfaction  on or before the Closing,  of each of the
     following conditions (any one or more of which may be waived by REI, R-CUBE
     and Seller, but only in a writing signed by REI, R-CUBE and Seller).

          11.1 Government Consents.  There shall have been obtained on or before
     the Closing such material permits or  authorizations,  and there shall have
     been  taken  such  other  action,  as may be  required  to  consummate  the
     transactions  contemplated  by this Agreement by any  

                                       22

<PAGE>

     regulatory  authority having  jurisdiction over the parties and the actions
     herein  proposed to be taken,  including  but not  limited to  requirements
     under applicable federal and state securities laws.

          11.2 No Legal  Action.  No temporary  restraining  order,  preliminary
     injunction  or  permanent   injunction  or  other  order   preventing   the
     consummation  of the  transactions  contemplated  by this  Agreement or the
     Other  Agreements  shall have been issued by any federal or state court and
     remain in  effect,  nor  shall  any  proceeding  initiated  by the  federal
     government seeking any of the foregoing be pending.

      12. TERMINATION OF AGREEMENT.

          12.1  Termination.  This Agreement may be terminated at any time prior
     to the Closing:

               (1) by written agreement of R-CUBE, REI and Seller;

               (2) by R-CUBE  and  Seller,  if there has been a breach by REI of
          any representation,  warranty, covenant or agreement set forth in this
          Agreement  on the part of REI, or if any  representation  of REI shall
          have  become  untrue,  in either case which has or can  reasonably  be
          expected to have a Material Adverse Effect and which REI fails to cure
          prior to the Closing (except that no cure period shall be provided for
          a breach by REI which by its nature cannot be cured);

               (3) by REI, if there has been a breach by R-CUBE or Seller of any
          representation,  warranty,  covenant  or  agreement  set forth in this
          Agreement on the part of R-CUBE or Seller, or if any representation of
          R-CUBE or Seller shall have become untrue, in either case which has or
          can reasonably be expected to have a Material Adverse Effect and which
          R-CUBE or Seller  fails to cure prior to the Closing  (except  that no
          cure period  shall be provided  for a breach by R-CUBE or Seller which
          by its nature cannot be cured);

               (4) by R-CUBE, Seller or REI, if:

                    (i)...if all the  conditions for Closing shall not have been
               satisfied or waived on or before  February 28, 1999 other than as
               a result of a breach of this Agreement by the terminating  party;
               or

                    (ii)..if  a  permanent  injunction  or  other  order  by any
               federal or state  court  which  would make  illegal or  otherwise
               restrain  or  prohibit  the   consummation  of  the  transactions
               contemplated  by this Agreement  shall have been issued and shall
               have become final and nonappealable.

          12.2 Notice of  Termination.  Any  termination of this Agreement under
     Section 12.1 will be  effective  by the  delivery of written  notice of the
     terminating party to the other parties hereto.

                                       23
<PAGE>

          12.3 Effect of  Termination.  In the case of any  termination  of this
     Agreement  or the  Other  Agreements  as  provided  in  Section  12 of this
     Agreement or the Other  Agreements,  this Agreement  shall be of no further
     force and effect  (except as provided  in Section  14) and  nothing  herein
     shall relieve any party from  liability for any breach of this Agreement or
     the Other Agreements. In case of any termination as a result of a breach by
     a party or the  failure  of a party to  satisfy  Closing  conditions  to be
     satisfied by it and which are within its control, that party shall bear all
     of  the  expenses   (including,   without  limitation,   reasonable  legal,
     accounting  and other  advisory  fees) of the  other  parties  incurred  in
     connection with the failed transaction; provided, however, that in no event
     shall REI be responsible for payment of the fees and expenses  described in
     Section  2.15.  In all other  cases of  termination,  each  party  shall be
     responsible for its own expenses.

      13. NON-COMPETITION.

          13.1 Definitions. For purposes of this Section 13, the following terms
     shall have the following meanings:

               (1) "Customer  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Customer  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.3.

               (2) The term "Customers" shall mean, with respect to each Seller,
          any manager,  group or division  located in a specific  building that,
          during the year preceding the date of this  Agreement,  as of the date
          of this  Agreement,  during the period from the date of this Agreement
          to the Closing Date or during the Employee  Non-Solicitation Period or
          the Customer Non-Solicitation Period is or was a client or customer of
          R-CUBE.

               (3) The words  "directly  or  indirectly"  shall mean:  (i) being
          personally  involved in providing or seeking to provide services to an
          Employee,  Customer or Prospective Customer; (ii) participating in any
          person or  enterprise as an owner,  partner,  limited  partner,  joint
          venturer,  controlling  member or  controlling  shareholder;  or (iii)
          communicating  to any  such  person  or  enterprise  any  confidential
          information  of the business  conducted by R-CUBE  during the relevant
          period.

               (4)  "Employees"  shall  mean any  employee  of  R-CUBE as of, or
          immediately  prior to the date of this  Agreement,  during  the period
          from the date of this  Agreement  to the  Closing  Date or during  the
          Employee  Non-Solicitation  Period  or the  Customer  Non-Solicitation
          Period.

               (5) "Employee  Non-Solicitation  Period" shall mean, with respect
          to  each  Seller,  the  period  commencing  on the  Closing  Date  and
          continuing  for a period  of two  years  after  such  date;  provided,
          however,  that the  Employee  Non-Solicitation  Period with respect to
          each  Seller  shall be  extended  by the  number of days in which such
          Seller  is or was  engaged  in  activities  constituting  a breach  of
          Section 13.2.  Notwithstanding the foregoing sentence, with respect to
          the 

                                       24

<PAGE>

          employment of Mr.  Deepak  Suktbankar,  the Employee  Non-Solicitation
          Period shall be from the date of this Agreement  through and including
          the date that is 45 days after the Closing Date.

               (6) The term  "person"  shall  mean  any  natural  person,  firm,
          partnership,  association,  corporation,  company,  limited  liability
          company,  limited  partnership,  trust,  business trust,  Governmental
          Entity or other entity.

               (7) The term "Prospective Customer" shall mean any manager, group
          or division located in a specific  building that R-CUBE has contacted,
          or has  developed a strategy  or plan to  contact,  for the purpose of
          acquiring manager, group or division as a customer or client.

          13.2  Non-Solicitation  of  Employees.   Sellers  recognize  that  the
     Employees  are a  valuable  resource  of  R-CUBE.  Accordingly,  during the
     Employee  Non-Solicitation  Period,  no Seller  shall,  either  alone or in
     conjunction with any other person or entity, directly or indirectly go into
     business  with any  Employee or solicit,  induce or recruit any Employee to
     leave the employ of R-CUBE.

          13.3  Non-Solicitation of Customers.  Sellers recognize that customers
     are a  valuable  resource  of  R-CUBE.  Accordingly,  during  the  Employee
     Non-Solicitation  Period,  no Seller shall,  either alone or in conjunction
     with any other person or entity,  directly or indirectly  call on, solicit,
     take away, accept as a client,  customer or prospective client or customer,
     or attempt to call on, solicit, take away, accept as a client,  customer or
     prospective client or customer a Customer or Prospective Customer.

          13.4  Additional  Agreements.   Seller  hereby  expressly  agrees  and
     acknowledges that:

               (1) R-CUBE has protectable business interests with respect to its
          Employees,  Customers and Prospective Customers,  and that competition
          with and against such business interests would be harmful to R-CUBE;

               (2) the covenants  contained in this Section 13 are reasonable as
          to time and geographical area and do not place any unreasonable burden
          upon each Seller's ability to earn a livelihood;

               (3) the public will not be harmed as a result of  enforcement  of
          the covenants contained in this Section 13;

               (4) the personal  legal  counsel for each Seller has reviewed the
          covenants contained in this Section 13;

               (5) the parties have entered into the covenants  contained herein
          in connection with and as a condition precedent to the consummation of
          the  Agreement and the Other  Agreements,  pursuant to which REI shall
          acquire  R-CUBE;  the  agreements,  actions,  covenants,  and promises
          contained  herein  are  intended  to  protect  and ensure the value of
          R-CUBE, including its goodwill, which actions, covenants, and promises
          are a material  consideration to REI in connection 

                                       25

<PAGE>

          with this Agreement and the Other Agreements;  and, to the extent that
          the laws of any  jurisdiction  in which  this  Agreement  or the Other
          Agreements   shall  be   interpreted,   construed,   and/or   enforced
          distinguish  between  covenants given in connection with the sale of a
          business and its  goodwill  and  covenants  given in  connection  with
          employment,  this  covenant  will be given the broader  interpretation
          customarily  given  to  covenants  in  connection  with  the sale of a
          business and the transfer of goodwill to REI; and

               (6) each Seller understands and agrees to each and every term and
          condition  contained  Section  13 of  this  Agreement  and  the  Other
          Agreements.

          13.5 Remedies; Enforceability. Seller recognizes and acknowledges that
     irreparable damage will result to REI in the event of a breach by Seller or
     any of  Seller's  affiliates  of the  provisions  of this  Section 13, and,
     accordingly,  in the  event  of such a  breach,  REI will be  entitled,  in
     addition to any other legal or  equitable  damages and remedies to which it
     may be entitled or which may be available, to an injunction to restrain the
     violation thereof. If any provision of this Section 13 shall be adjudicated
     by a court of competent jurisdiction to be invalid or unenforceable because
     of the scope, duration, area of its applicability, or any other reason, the
     court making such  determination  will have the power to modify such scope,
     duration, or area, or all of them, or to strike an invalid or unenforceable
     provision, in whole or in part, to the extent necessary to make such scope,
     duration, area, or provision valid and enforceable.

      14. SURVIVAL OF REPRESENTATIONS, WARRANTIES AND COVENANTS.

          All representations, warranties and covenants of the parties contained
     in this  Agreement  will  remain  operative  and in full force and  effect,
     regardless of any investigation made by or on behalf of the parties to this
     Agreement,  until the earlier of the  termination  of this Agreement or one
     year after the Closing Date, whereupon the representations,  warranties and
     covenants  will expire (except for  covenants,  such as those  contained in
     Sections  4.8,  5.4, 7 and 13,  that by their  terms  survive  for a longer
     period).

      15. MISCELLANEOUS.

          15.1  Governing  Law.  The  internal  laws of the State of  California
     (irrespective  of its choice of law principles) will govern the validity of
     this Agreement,  the construction of its terms and the  interpretation  and
     enforcement of the rights and duties of the parties hereto.

          15.2 Assignment;  Binding Upon Successors and Assigns. No party hereto
     may assign any of its rights or  obligations  hereunder  without  the prior
     written consent of the other parties hereto. This Agreement will be binding
     upon and inure to the  benefit of the parties  hereto and their  respective
     successors and permitted assigns.

          15.3  Severability.  If  any  provision  of  this  Agreement,  or  the
     application  thereof,  will for any  reason and to any extent be invalid or
     unenforceable,  the  remainder of this  Agreement and  application  of such
     provision  to other  persons or  circumstances  will be  interpreted  so as
     reasonably  to effect the  interest  of the  parties  hereto.  The  parties
     further  agree to  replace  such void or  unenforceable  provision  of this
     Agreement with a valid and enforceable  provision that will 

                                       26

<PAGE>

     achieve, to the greatest extent possible, the economic,  business and other
     purpose of the void unenforceable provision.

          15.4  Counterparts.  This  Agreement  may be executed in any number of
     counterparts, each of which will be deemed an original as regards any party
     whose  signature  appears thereon and all of which together will constitute
     one and the same instrument. This Agreement will become binding when one or
     more  counterparts  hereof,  individually or taken together,  will bear the
     signatures of all the parties reflected hereon as signatories.

          15.5 Other Remedies.  Except as otherwise provided herein, any and all
     remedies herein expressly  conferred upon a party will be deemed cumulative
     with and not  exclusive of any other remedy  conferred  hereby or by law on
     such  party,  and the  exercise  of any one remedy  will not  preclude  the
     exercise of any other.

          15.6  Amendment and Waivers.  Any term or provision of this  Agreement
     may be amended,  and the  observance  of any term of this  Agreement may be
     waived   (either   generally  or  in  a  particular   instance  and  either
     retroactively or prospectively) only by a writing signed by the party to be
     bound thereby. The waiver by a party of any breach hereof or default in the
     performance  hereof will not be deemed to  constitute a waiver of any other
     default or any succeeding breach or default.

          15.7  Expenses.  Except as provided in Section  12.3,  REI, on the one
     hand,  and  Sellers  and  R-CUBE,  on the  other,  will each bear their own
     expenses and legal fees  incurred  with respect to this  Agreement  and the
     transactions contemplated hereby.

          15.8 Attorneys'  Fees.  Should suit be brought to enforce or interpret
     any part of this  Agreement,  the  prevailing  party  will be  entitled  to
     recover, as an element of the costs of suit and not as damages,  reasonable
     attorneys' fees to be fixed by the court  (including,  without  limitation,
     costs, expenses and fees on any appeal).

          15.9 Notices.  All notices and other  communications  pursuant to this
     Agreement shall be in writing and deemed to be sufficient if contained in a
     written  instrument  and shall be  deemed  given if  delivered  personally,
     telecopied,  sent by  nationally-recognized  overnight courier or mailed by
     registered or certified mail (return receipt  requested),  postage prepaid,
     to the parties at the following  address (at such other address for a party
     as shall be specified by like notice):

<TABLE>
            <C>                     <S> 
            If to R-CUBE to:........R-CUBE Technologies, Inc.
                                    20410 Town Center Lane, #160
                                    Cupertino, California  95014
                                    Attention: Chief Executive Officer
                                    Telecopier: (408) 255-2042
</TABLE>

                                       27
<PAGE>
<TABLE>
            <C>                     <S> 
            With a copy to:.........Gray Cary Ware & Friedenrich LLP
                                    4365 Executive Drive, Suite 1600
                                    San Diego, California 92121-2189
                                    Attention: Christopher M. Smith, Esq.
                                    Telecopier: (619) 677-1477

            If to REI to:...........Research Engineers, Inc.
                                    22700 Savi Ranch Parkway
                                    Yorba Linda, California 92887
                                    Attention: Chief Executive Officer
                                    Telecopier: (714) 974-4771

            With a copy to:.........Rutan & Tucker, LP
                                    611 Anton, Suite 1400
                                    Costa Mesa, California 92626
                                    Attention: Cristy G. Lomenzo, Esq.
                                    Telecopier: (714) 546-9035

            If to Sellers to:.......Srinivasa Reddy Malireddy
                                    21195 Granola Road
                                    Cupertino, California 95014
</TABLE>

          All  notices  and  other  communications  shall be deemed to have been
     received (a) in the case of personal delivery, on the date of delivery, (b)
     in the case of a  telecopy,  when the party  receiving  the copy shall have
     confirmed  receipt of the  communication,  (c) in the case of  delivery  by
     nationally-recognized  overnight  courier,  on the business  day  following
     dispatch,  and (d) in the  case  of  mailing,  on the  third  business  day
     following such mailing.

          15.10 Construction of Agreement. This Agreement has been negotiated by
     the respective  parties hereto and their  attorneys and the language hereof
     will not be construed for or against either party. A reference to a Section
     or an Exhibit will mean a Section in, or Exhibit to, this Agreement  unless
     otherwise  explicitly  set forth.  The titles and  headings  herein are for
     reference  purposes only and will not in any manner limit the  construction
     of this Agreement which will be considered as a whole.

          15.11 No Joint  Venture.  Nothing  contained in this Agreement will be
     deemed or construed as creating a joint venture or partnership  between any
     of the parties to this  Agreement.  No party is by virtue of this Agreement
     authorized  as an  agent,  employee  or legal  representative  of any other
     party.  No  party  will  have the  power  to  control  the  activities  and
     operations  of any other.  The status of the parties  hereto is, and at all
     times will continue to be, that of independent  contractors with respect to
     each other. No party will have any power or authority to bind or commit any
     other.   No  party  will  hold  itself  out  as  having  any  authority  or
     relationship in contravention of this Section.

          15.12 Further  Assurances.  Each party agrees to cooperate  fully with
     the other  parties and to execute such further  instruments,  documents and
     agreements and to give such further written assurances as may be reasonably
     requested  by any other  party to evidence  and  reflect  the  

                                       28

<PAGE>

     transactions  described  herein and  contemplated  hereby and to carry into
     effect the intents and purposes of this Agreement.

          15.13 Absence of Third Party Rights.  No provisions of this  Agreement
     are intended, nor will be interpreted, to provide or create any third party
     beneficiary rights or any other rights of any kind in any client, customer,
     affiliate,  shareholder  or partner of any party hereto or any other person
     or entity unless specifically  provided otherwise herein, and, except as so
     provided, all provisions hereof will be personal solely between the parties
     to this Agreement.

          15.14 Entire Agreement.  This Agreement and the schedules and exhibits
     hereto  constitute  the entire  understanding  and agreement of the parties
     hereto with respect to the subject  matter  hereof and  supersede all prior
     and   contemporaneous   agreements  or   understandings,   inducements   or
     conditions,  express or implied,  written or oral, between the parties with
     respect  hereto.  The express terms hereof control and supersede any course
     of performance or usage of trade inconsistent with any of the terms hereof.

                                       29
<PAGE>




      IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  or caused this
Agreement to be executed by their duly authorized  respective officers as of the
date first above written.

REI:                                RESEARCH ENGINEERS, INC.,
                                    a Delaware corporation

                                    By: /S/ AMRIT K. DAS
                                    --------------------
                                    Amrit K. Das, President

                                    By: /S/ WAYNE L. BLAIR
                                    ----------------------
                                    Wayne L. Blair, Secretary

R-CUBE:                             R-CUBE TECHNOLOGIES, INC.,
                                    a California corporation

                                    By: /S/ KRISHNA P. REDDY
                                    ------------------------
                                    Krishna P. Reddy, President

                                    By: /S/ SRINIVASA REDDY MALIREDDY
                                    ---------------------------------
                                    Srinivasa Reddy Malireddy,
                                    Secretary

SELLER:                             /S/ SRINIVASA REDDY MALIREDDY
                                    -----------------------------
                                    Srinivasa Reddy Malireddy, an 
                                    individual


I, THE  SPOUSE OF  SELLER,  HAVE  EXECUTED  THIS  AGREEMENT  FOR THE  PURPOSE OF
CONFIRMING MY CONSENT TO THE CONVEYANCE OF MY COMMUNITY  PROPERTY  INTEREST,  IF
ANY, IN SHARES OF CAPITAL STOCK OF R-CUBE PURSUANT TO THIS AGREEMENT

                /S/ M. VEDA VATHI
                ----------------------------
                Print Name: M. Veda Vathi





                                       30


<PAGE>
                                                                     Exhibit 2.4

                            CREDIT AGREEMENT
                            ----------------


This Credit  Agreement  ("Agreement")  is made and entered  into on February 26,
1999,  by and between  Research  Engineers,  Inc.  corporation,  "Borrower"  and
Imperial Bank, a California banking corporation, ("Bank").

Subject to the terms and conditions of this  Agreement,  any security  agreement
executed by Borrower in favor of Bank,  any notes  executed by Borrower in favor
of  Bank,   or  any  other   agreements   executed  in   conjunction   therewith
(collectively,  the "Loan Documents"), Bank shall make the loans and or advances
referred to below to Borrower.

In consideration of mutual covenants and conditions  hereof,  the parties hereto
agree as follows:

1.    AMOUNT AND TERMS OF CREDIT

1.01  Revolving Credit Commitment.

(a)  Revolving  Line of  Credit.  Subject  to the terms and  conditions  of this
Agreement,  provided  that  no  event  of  default  then  has  occurred  and  is
continuing,  Bank shall,  upon  Borrower's  request  make  advances  ("Revolving
Loans") to Borrower,  for the  acquisition  of R-Cube  Technologies,  Inc.,  and
general  corporate  purposes,  in an  amount  not to  exceed  $  2,320,000  (the
"Revolving  Line of Credit")  until  September 1, 2000 (the  "Revolving  Line of
Credit Maturity Date").  Revolving Loans may be repaid and reborrowed,  provided
that all outstanding principal and accrued interest on the Revolving Loans shall
be payable in full on the Revolving Credit Maturity Date.

(b) Revolving Note. The interest rate, principal and interest payments, maturity
date and  certain  other  terms of the  Revolving  Loan will be  contained  in a
promissory  note  dated the date of this  agreement,  as such may be  amended or
replaced from time to time.


1.02  Loan Fee.  In  addition  to any  other  amounts  due,  or to  become  due,
concurrent with the execution  hereof,  in connection with the Revolving Line of
Credit, Borrower shall pay to Bank a loan fee of Forty Six Thousand Four Hundred
Dollars ($46,400) at the time of execution of this agreement.

1.03  Documentation  Fee,  Costs and Expenses.  In addition to any other amounts
due, or to become due,  concurrently with the execution hereof,  Borrower agrees
to pay to Bank a documentation fee in the amount of $1,600,  and all other costs
and expenses  incurred by the Bank in the  preparation  of this  Agreement,  the
other Loan Documents and the perfection of any security interest granted to Bank
by Borrower.

1.04  Collateral.  Borrower  shall  grant or cause to be granted to Bank a first
priority  lien on any and all  personal  property  assets of  Borrower  which is
assigned or  hereafter  is assigned to Bank as security or in which Bank now has
or  hereafter  acquires  a security  interest  or  pursuant  to the terms of any
security agreement,  an intellectual property security agreement or otherwise as
security for all of  Borrower's  obligations  to Bank,  all as may be subject to
Section 5.03 herein. Borrower has also assigned, or has caused 

                                       1
<PAGE>


to be assigned,  a second "deed of trust" on the real estate property located at
22700 Savi Ranch,  Yorba Linda, CA, as collateral for Borrower's  obligations to
Bank.  Additionally,  "Single Premium  Deferred  Annuities" of Mr. Amrit K. Das,
described  in  Exhibit  1.11  attached   hereto  as  collateral  for  Borrower's
obligations to Bank, shall be assigned to Bank.

1.05 Collection of Payments.  Borrower  authorizes Bank to collect all interest,
fees,  costs,  and/or  expenses due under this Agreement by charging  Borrower's
demand deposit  account  number  08224366 with Bank, or any other demand deposit
account  maintained by Borrower with Bank, for the full amount  thereof.  Should
there be  insufficient  funds in any such demand deposit account to pay all such
sums when due, the full amount of such  deficiency  shall be immediately due and
payable by Borrower.


2.    REPRESENTATIONS OF BORROWER

Borrower represents and warrants that:

2.01  Existence  and  Rights.  Borrower is a  corporation,  duly  organized  and
existing and in good standing under the laws of the state of Delaware.  Borrower
is  authorized  and  in  good  standing  to do  business  in  the  state  of its
incorporation;  Borrower  has the  appropriate  powers and  adequate  authority,
rights and  franchises  to own its  property and to carry on its business as now
conducted, and is duly qualified and in good standing in each state in which the
character of the  properties  owned by it therein or the conduct of its business
makes such  qualification  necessary;  and  Borrower  has the power and adequate
authority to make and carry out this  Agreement.  Borrower has no  investment in
any other business entity unless specified in writing to Bank.

2.02  Agreement  Authorized.  The  execution,  delivery and  performance of this
Agreement  and the Loan  Documents  are duly  authorized  and do not require the
consent or approval of any governmental body or other regulatory authority;  are
not in contravention of or in conflict with any law or regulation or any term or
provision of Borrower's articles of incorporation,  by-laws, or similar document
as the case  may be,  and this  Agreement  is the  valid,  binding  and  legally
enforceable obligation of Borrower in accordance with its terms; subject only to
bankruptcy, insolvency or similar laws affecting creditors rights generally.

2.03 No Conflict. The execution,  delivery and performance of this Agreement and
the  Loan  Documents  are  not  in  contravention  of or in  conflict  with  any
agreement,  indenture or undertaking to which Borrower is a party or by which it
or any of its  property  may be bound or  affected,  and do not  cause any lien,
charge or other  encumbrance  to be created or imposed upon any such property by
reason thereof.

2.04 Litigation. Except as disclosed in writing to bank by Borrower, there is no
litigation  or other  proceeding  pending or  threatened  against  or  affecting
Borrower which if determined  adversely to Borrower or its interest would have a
material adverse effect on the financial condition of Borrower,  and Borrower is
not in default with respect to any order, writ, injunction,  decree or demand of
any court or other governmental or regulatory authority.

2.05 Financial  Condition.  The  consolidated  balance sheet of Borrower,  as of
12/31/98,  and the related  profit and loss  statement for the nine month period
ended as of that date, a copy of which has 

                                       2
<PAGE>

heretofore been delivered to Bank by Borrower, and all other statements and data
submitted  in writing by Borrower to Bank in  connection  with this  request for
credit are true and correct, and said balance sheet truly presents the financial
condition  of  Borrower  as of the  date  thereof,  and  has  been  prepared  in
accordance with generally accepted accounting principles on a basis consistently
maintained.  Since such date there have been no material  adverse changes in the
financial  condition or business of  Borrower.  Borrower has no knowledge of any
liabilities, contingent or otherwise, at such date not reflected in said balance
sheet, and Borrower has not entered into any special  commitments or substantial
contracts  which are not  reflected  in said  balance  sheet,  other than in the
ordinary and normal course of its business,  which may have a materially adverse
effect upon its financial condition, operations or business as now conducted.

2.06 Title to Assets.  Borrower  has good title to its assets,  and the same are
not subject to any liens or  encumbrances  other than those permitted by Section
5.03 hereof.

2.07 Tax Status.  Borrower has no liability for any delinquent  state,  local or
federal  taxes,  and, if Borrower has  contracted  with any  government  agency,
Borrower has no liability for renegotiation of profits.

2.08  Trademarks,  Patents.  Upon the filing of the  copyrights for the software
shown on Exhibit 2.08 attached  Borrower will possess all necessary  trademarks,
trade names,  copyrights,  patents,  patent rights,  and licenses to conduct its
business as now operated,  without any known conflict with the valid trademarks,
trade names, copyrights, patents and license rights of others.

2.09 Regulation U. None of the proceeds of any Loan shall be used to purchase or
carry margin stock (as defined within  Regulation U of the Board of Governors of
the Federal Reserve system).

2.10  ERISA.  All  defined  benefit  pension  plans as defined in the  Employees
Retirement Income Security Act of 1974, as amended ("ERISA"),  of Borrower meet,
as of the date hereof,  the minimum  funding  standards of Section 302 of ERISA,
and no  Reportable  Event or  Prohibited  Transaction  as  defined  in ERISA has
occurred with respect to any such plan.

2.11 Year 2000 Compliance.  Borrower and its subsidiaries,  as applicable,  have
reviewed the areas within their operations and business which could be adversely
affected  by, and have  developed  or are  developing  a program to address on a
timely basis, the Year 2000 Problem and have made related appropriate inquiry of
material suppliers and vendors,  and based on such review and program,  the Year
2000  Problem  will not  have a  material  adverse  effect  upon  its  financial
condition,  operations or business as now  conducted.  "Year 2000 Problem" means
the possibility that any computer applications or equipment used by Borrower may
be unable to recognize and properly perform date sensitive  functions  involving
certain dates prior to and any dates one or after December 31, 1999.

3.    CONDITIONS PRECEDENT TO LOAN.

            Prior to Bank  being  obligated  to make any Loan  pursuant  to this
Agreement, Bank must receive all of the following, each of which must be in form
and substance satisfactory to Bank:

3.01        Promissory Note. Original, executed promissory note.

                                       3
<PAGE>

3.02 Security  Agreement.  Original,  executed security  agreement  covering the
personal property  collateral  securing the Loan and/or a deed of trust covering
the real estate collateral.

3.03 Financing  Statement.  Financing  statements  executed by Borrower and each
grantor of a security interest.

3.04 Guarantee . Continuing Guarantees in favor of Bank executed by Mr. Amrit K.
Das  as an  individual  and as a  Trustee  of the A.  and P.  Das  Living  Trust
("Guarantor") both in the amount of $2,320,000 .

3.05  Insurance.  Borrower  shall have  delivered to Bank  evidence of insurance
coverage required  pursuant to that Agreement to Provide  Insurance  executed by
Borrower,  in form, substance,  amounts,  covering risks and issued by companies
satisfactory to Bank, and where required by Bank, with loss payable endorsements
in favor of Bank.

3.06 Organizational  Documents.  Copies of the charter/articles of incorporation
or similar document as the case may be, of the Borrower.

3.07  Authorizations.  Certified  copies of all action taken by the Borrower and
each  Guarantor  and each  grantor  of a  security  interest  to  authorize  the
execution, delivery and performance of the Loan Documents.

3.08 Good Standing . Good standing  certificates from the appropriate  secretary
of state of the state in which the  Borrower is  organized  and in each state in
which it is required to be qualified to do business.

3.09  Additional  Documents.  Such other  documents as Bank may reasonably  deem
necessary.

4.    AFFIRMATIVE COVENANTS OF BORROWER

Borrower  agrees that so long as it is indebted to Bank,  under  borrowings,  or
other  indebtedness,  or so long as Bank has any  obligation to extend credit to
Borrower it will, unless Bank shall otherwise consent in writing:

4.01 Rights and  Facilities.  Maintain and preserve all rights,  franchises  and
other  authority  adequate  for  the  conduct  of  its  business;  maintain  its
properties,  equipment  and  facilities  in good order and  repair;  conduct its
business  in  an  orderly  manner  without  voluntary  interruption  and,  if  a
corporation or partnership, maintain and preserve its existence.

4.02 Use of Proceeds.  Use the proceeds of the Loans only for purposes specified
in Section1 of this Agreement.

4.03  Insurance.   Maintain  public  liability,  property  damage  and  workers'
compensation  insurance and insurance on all its insurable property against fire
and other  hazards with  responsible  insurance  carriers to the extent  usually
maintained  by  similar  businesses  and/or  in the  exercise  of good  business
judgment,  and as required by that  Agreement to Provide  Insurance  executed by
Borrower, with the Bank to be shown as Lenders Loss Payee on such policies.

                                       4
<PAGE>

4.04 Taxes and Other  Liabilities.  Pay and  discharge,  before the same  become
delinquent and before  penalties  accrue  thereon,  all taxes,  assessments  and
governmental  charges upon or against it or any of its  properties,  and all its
other liabilities at any time existing, except to the extent and so long as:

(a) The same are being contested in good faith and by appropriate proceedings in
such manner as not to cause any  materially  adverse  effect upon its  financial
condition or the loss of any right of redemption from any sale thereunder; and

(b) It shall  have set aside on its books  reserves  (segregated  to the  extent
required by generally accepted accounting  practice) deemed by it to be adequate
with respect thereto.

4.05 Records and Reports. Maintain a standard and modern system of accounting in
accordance with generally accepted accounting principles on a basis consistently
maintained;  permit Bank's representatives to have access to, and to examine its
properties, books and records at all reasonable times and upon reasonable notice
during normal business hours; and furnish Bank:

(a)Monthly Financial  Statement.  As soon as available,  and in any event within
   thirty  (30) days  after the close of each  month,  a  consolidating  balance
   sheet,  profit and loss statement and  reconciliation  of Borrower's  capital
   balance  accounts for  Borrower's US operation as of the close of such period
   and covering  operations for the portion of Borrower's  fiscal year ending on
   the  last  day of  such  period,  all in  reasonable  detail  and  reasonably
   acceptable  to  Bank,  in  accordance  with  generally  accepted   accounting
   principles on a basis consistently maintained by Borrower.

(b)Quarterly Financial Statement. As soon as available,  and in any event within
   forty  five (45) days  after the close of each  quarter,  a 10Q  report and a
   consolidated  balance sheet,  profit and loss statement and reconciliation of
   Borrower's  capital  balance  accounts  as of the  close of such  period  and
   covering  operations for the portion of Borrower's  fiscal year ending on the
   last day of such period,  all in reasonable detail and reasonably  acceptable
   to Bank, in accordance  with generally  accepted  accounting  principles on a
   basis  consistently  maintained by Borrower and  certified by an  appropriate
   officer of Borrower.

(c)Annual  Financial  Statement.  As soon as available,  and in any event within
   ninety (90) days after and as of the close of each fiscal year of Borrower, a
   10K report and a consolidated  report of audit of Company,  all in reasonable
   detail,  audited by an independent  certified public  accountant  selected by
   Borrower and  reasonably  acceptable to Bank, in  accordance  with  generally
   accepted accounting principles on a basis consistently maintained by Borrower
   and certified by an appropriate officer of Borrower.

(d)Officer's  Certificate.  Within  forty  five (45) days  after the end of each
   quarter  of  Borrower,  a  certificate  of the  chief  financial  officer  of
   Borrower,  stating that  Borrower has  performed  and observed each and every
   covenant  contained in this Agreement to be performed by it and that no event
   has  occurred  and no condition  then exists  which  constitutes  an event of
   default hereunder or would constitute such an event of default upon the lapse
   of time or upon the giving of notice and the lapse of time specified  herein;
   or, if any such event has occurred or any such condition  exists,  specifying
   the nature thereof.

                                       5
<PAGE>

(e)Accounts  Receivable And Accounts  Payable  Agings;  Within fifteen (15) days
   from each month-end, deliver to Bank, for Borrower's US operation, a detailed
   accounts  receivable  aging  reconciled to the general ledger of Borrower,  a
   detailed  accounts payable aging reconciled to the Borrower's  general ledger
   and setting  forth the amount of any book  overdraft  or the amount of checks
   issued but not sent;  and within  twenty  (20) days from each  quarter  end a
   detailed  consolidated  accounts  receivable  aging reconciled to the general
   ledger of Borrower, a detailed consolidated accounts payable aging reconciled
   to the  Borrower's  general  ledger and setting  forth the amount of any book
   overdraft or the amount of checks issued but not sent. All the foregoing will
   be in a form and with such detail as Bank may request from time to time.

(f)Guarantors'  Financial  Statements.  Cause each  Guarantor  to submit to Bank
   such  Guarantor's  financial  statement,  confirmed as to its  correctness by
   Guarantor's  signature,  either on Bank's form or prepared by an  independent
   certified  public  accountant,   together  with  a  completed  copy  of  such
   Guarantor's  federal  income tax return for the previous  calendar  year,  no
   later than thirty (30) days after  filing of same with the  Internal  Revenue
   Service.

(g)Stockholder,   Security  and  Exchange  Commission   Statements  and  Reports
   Promptly after the same are available,  copies of all such proxy  statements,
   financial  statements and reports as Borrower or any subsidiary shall send to
   its members or stockholders as appropriate, if any, and copies of all reports
   which  Borrower or any  subsidiary  may file with the Securities and Exchange
   Commission.

(h)Other  Information.  Such  other  information  relating  to  the  affairs  of
   Borrower as the Bank reasonably may request from time to time.

4.06 Current Ratio.  Maintain on a quarterly basis a consolidated  minimum ratio
of total current assets  excluding all amounts due from  stockholders,  officers
and affiliates divided by total current liabilities including all amounts due to
stockholders, officers and affiliates of 1.50:1.00.

4.07 Effective Tangible Net Worth.  Maintain on a quarterly basis a consolidated
Effective Tangible Net Worth (defined as stockholder's equity less any value for
goodwill, trademarks, patents, copyrights, leaseholds,  organization expense and
other similar intangible items, and any amounts due from stockholders,  officers
and affiliates) plus any  Subordinated  Debt,  meaning debt  subordinated to the
obligations of Borrower to Bank, in form and substance  satisfactory to Bank, of
not less than Two Million Seven Hundred Thousand Dollars  ($2,700,000)  plus 70%
of positive net income after taxes for each period.

4.08 Debt to  Effective  Tangible  Net Worth.  Maintain on a  quarterly  basis a
consolidated ratio of total liabilities to Effective Tangible Net Worth (defined
as  stockholder's  equity  less any value  for  goodwill,  trademarks,  patents,
copyrights, leaseholds, organization expense and other similar intangible items,
and any  amounts  due  from  stockholders,  officers  and  affiliates)  plus any
Subordinated  Debt,  meaning debt subordinated to the obligations of Borrower to
Bank,  in  form  and  substance  satisfactory  to  Bank,  of  not  greater  than
2.75.00:1.00.


4.09 ERISA.  Cause all defined  benefit  pension plans,  as defined in ERISA, of
Borrower to, at all times,  meet the minimum funding standards of Section 302 of
ERISA, and ensure that no Reportable Event or Prohibited Transaction, as defined
in ERISA, will occur with respect to any such plan.

                                       6
<PAGE>

4.10 Laws.  At all times comply with,  or cause to be complied  with,  all laws,
statues, rules, regulations, orders and directions of any governmental authority
having jurisdiction over Borrower or Borrower's business.

4.11 Use of  Proceeds.  Use the  proceeds  of the  Loans  only for the  purposes
specified in Section 1 herein.

4.12 GAAP.  Compliance with all financial covenants shall be calculated based on
generally  accepted  accounting  principles  applied  on a  consistent  basis as
maintained by Borrower.

4.13 Year 2000 Compliant.  Borrower shall perform all acts reasonably  necessary
to  ensure  that  (a)  Borrower  and any  business  in  which  Borrower  holds a
substantial  interest,  and (b)  all  customers,  suppliers  and  vendors  whose
compliance  is likely to be material to  Borrower's  business,  become Year 2000
Compliant  in a timely  manner.  Such acts shall  include,  without  limitation,
performing a comprehensive  review and assessment of all Borrower's  systems and
adopting a detailed plan, with itemized budget, for the remediation,  monitoring
and testing of such systems.  As used in this  paragraph,  "Year 2000 Compliant"
shall mean,  in regard to any entity,  that all  software,  hardware,  firmware,
equipment,  goods or systems utilized by or material to the business  operations
or financial  condition of such entity,  will  properly  perform date  sensitive
functions before,  during and after the year 2000.  Borrower shall,  immediately
upon  request,  provide  to  Agent  such  certifications  or other  evidence  of
Borrower's  compliance with the terms of this paragraph as Bank may from time to
time require.

4.14 Operating Accounts.  Maintain all primary accounts and banking relationship
with the Bank.  Maintain,  or cause to be  maintained,  on  deposit  with  Bank,
non-interest  bearing demand deposit balances  sufficient to compensate Bank for
all services provided by Bank.  Balances shall be calculated after reduction for
the reserve  requirement of the Federal Reserve Board and uncollected funds. Any
deficiencies shall be charged directly to the Borrower on a monthly basis.

4.15 Notices. Promptly notify Bank in writing of (i) the occurrence of any Event
of Default  hereunder  or any event which upon notice and lapse of time would be
an Event of Default;  (ii) all litigation affecting Borrower where the amount is
$100,000 or more; any substantial  dispute which may exist between  Borrower and
any  governmental  regulatory body or law enforcement  authority;  any change in
Borrower's  name or principal  place of business;  or any other matter which has
resulted or might result in a material  adverse  change in Borrower's  financial
condition or operations.


4.16  Intellectual  Property.  Within  60 days  from the date of this  Agreement
Borrower will have registered those copyrights for the software shown on Exhibit
2.08  hereto  with the U.S.  Copyright  Office  and will  grant  Bank a security
interest in such copyrights in form and substance satisfactory to Bank. Borrower
also acknowledges  that upon developing,  creating or acquiring any intellectual
property it must notify Bank, register such intellectual property and grant Bank
a security  interest in  accordance  with the  addendum to the General  Security
Agreement executed by Borrower on the date hereof.

5.          NEGATIVE COVENANTS OF BORROWER

Borrower  agrees that so long as it is indebted to Bank,  or so long as Bank has
any obligation to extend credit to Borrower, it will not, without Bank's written
consent:

                                       7
<PAGE>

5.01        Type of Business;  Management;  Change in Control.  Make any
substantial  change in the  character of its business or make any change
in its executive management.

5.02  Outside  Indebtedness.  Create,  incur,  assume  or  permit  to exist  any
indebtedness  for  borrowed  moneys  other  than  Loans  from  the  Bank  except
obligations  now existing as shown in the financial  statement  dated  12/31/98,
excluding  those  obligations  being  refinanced  by Bank,  or sell or transfer,
either with or without recourse,  any accounts or notes receivable or any moneys
due or to become due.

5.03  Liens and  Encumbrances.  Create,  incur,  permit to exist,  or assume any
mortgage,  pledge,  encumbrance,  lien or  charge of any kind upon any asset now
owned or hereafter acquired by it, other than liens for taxes not delinquent and
liens in Bank's favor and other than liens agreed to in writing by Bank.

5.04 Loans,  Investments,  Secondary Liabilities.  Make any loans or advances to
any person or other entity  other than in the ordinary and normal  course of its
business as now conducted or make any investment in the securities of any person
or other  entity  other than the  United  States  Government;  or  guarantee  or
otherwise  become  liable  upon the  obligation  of any person or other  entity,
except by endorsement of negotiable instruments for deposit or collection in the
ordinary and normal course of its business.

5.05  Acquisition  or Sale of  Business;  Merger or  Consolidation.  Purchase or
otherwise  acquire  the assets or  business  of any person or other  entity;  or
liquidate, dissolve, merge or consolidate, or commence any proceedings therefor;
or sell any assets  except in the ordinary and normal  course of its business as
now conducted;  or sell, lease,  assign, or transfer any substantial part of its
business or fixed  assets,  or any  property or other assets  necessary  for the
continuance of its business as now conducted,  including without  limitation the
selling of any  property or other asset  accompanied  by the leasing back of the
same.

5.06  Capital  Expenditures.  Make or incur  obligations  for  fixed or  capital
assets,  which includes purchase money indebtedness or capital lease obligations
in excess of $25,000  from the date  hereof  until March 31, 1999 or $100,000 in
any twelve month period thereafter.

5.07  Operating  Lease  Expenditures.  Make or incur  obligations  for operating
leases for real or personal  property in excess of $25,000  from the date hereof
until March 31, 1999 or $100,000 in any twelve (12) month period thereafter.


5.08  Dividends.  Declare or pay any dividend or make any other  distribution on
any of its capital stock now outstanding or hereafter issued or purchase, redeem
or retire any of such stock other than in dividends or distributions  payable in
Borrower's capital stock,  except for the repurchase of Borrower's capital stock
from officers, directors,  employees or consultants of Borrower upon termination
of their employment with or rendering of service to Borrower.

                                       8
<PAGE>

6.    EVENTS OF DEFAULT

The occurrence of any of the following  events of default  ("Events of Default")
shall, at Bank's option,  terminate Bank's  commitment to lend and make all sums
of principal and interest then remaining  unpaid on all Borrower's  indebtedness
to Bank immediately due and payable, all without demand,  presentment or notice,
all of which are hereby expressly waived:

6.01 Failure to Pay.  Failure to pay any installment of principal or of interest
on any indebtedness of Borrower to Bank within, five (5) days of its due date.

6.02  Breach of  Covenant.  Failure of  Borrower  to  perform  any other term or
condition of this Agreement or any Loan Document binding upon Borrower.

6.03 Breach of Warranty.  Any of Borrower's  representations  or warranties made
herein or any  statement or  certificate  at any time given in writing  pursuant
hereto or in connection herewith shall be false or misleading in any respect.

6.04 Insolvency;  Receiver or Trustee. Borrower shall become insolvent; or admit
its  inability to pay its debts as they mature;  or make an  assignment  for the
benefit of creditors;  or apply for or consent to the  appointment of a receiver
or trustee for it or for a substantial part of its property or business.

6.05 Judgments,  Attachments.  Any money judgment in excess of $ 50,000, writ or
warrant of  attachment,  or similar  process  shall be entered or filed  against
Borrower or any of its assets and shall remain  unvacated,  unbonded or unstayed
for a period of ten (10) days or in any event  later than five (5) days prior to
the date of any proposed sale thereunder.

6.06  Bankruptcy.   Bankruptcy,   insolvency,   reorganization   or  liquidation
proceedings or other  proceedings for relief under any bankruptcy law or any law
for the relief of debtors  shall be  instituted  by or against  Borrower and, if
instituted   against  it,  shall  not  be  dismissed  within  thirty  (30)  days
thereafter.

6.07 Revocation of Guarantee.  Any guarantee  required  hereunder is breached or
becomes  ineffective;  or any Guarantor or  subordination  creditor  disavows or
attempts to revoke or terminate such guarantee or subordination agreement.

6.08 Ownership.  Any change in ownership which results in the Guarantor's owning
less than 20 percent (20%) of Borrower's voting stock.

6.09 Cessation of Business...Borrower shall voluntarily suspend its business.

6.10 Adverse  Change. Any  change which, in the opinion of Bank, is materially
adverse to the financial condition of Borrower or any Guarantor; or should Bank,
for any reason,  believe that the prospect of Borrower's  payment or performance
hereunder or under any other agreement or instrument with Bank be impaired.

                                       9
<PAGE>

6.11 Other  Defaults. Borrower,  or any Guarantor of Borrower's obligations to
Bank,  shall  commit or do or fail to commit or do any act or thing  which would
constitute  an event of default  under any of the terms of any other  agreement,
document  or  instrument  executed  or  to be  executed  by  it  concerning  the
obligation to pay money.

6.12 Advances.  Notwithstanding  anything to the contrary contained herein, Bank
shall  have  no  duty to  make  advances  while  any  event  of  default  exists
notwithstanding any cure period provided for herein.

7.    MISCELLANEOUS PROVISIONS

7.01 Failure or Indulgence  Not Waiver.  No failure or delay on the part of Bank
or any holder of notes issued hereunder,  in the exercise of any power, right or
privilege  hereunder shall operate as a waiver thereof,  nor shall any single or
partial exercise of any such power, right or privilege preclude other or further
exercise  thereof  or of any other  right,  power or  privilege.  All rights and
remedies existing under this Agreement or any note (s) issued in connection with
a Loan that Bank may make  hereunder,  are  cumulative to, and not exclusive of,
any rights or remedies otherwise available.

7.02  Counterparts;  Entire  Agreement.  This  Agreement  may be executed by the
parties hereto in several  counterparts,  each of which shall be deemed to be an
original  and all of  which  shall  constitute  together  but  one and the  same
agreement.  This Agreement,  and the other Loan Documents  constitute the entire
understanding among the parties hereto with respect to the subject matter hereof
and supersedes any prior agreements, written or oral, with respect thereto.

7.03  Attorney's  Fees.  Borrower will pay promptly to Bank without demand after
notice,  with  interest  thereon  from  the  date  of  expenditure  at the  rate
applicable to the Loan,  reasonable  attorneys'  fees and all costs and expenses
paid or  incurred  by Bank in  collecting  or  compromising  the Loan  after the
occurrence  of an Event of  Default,  whether  or not suit is filed.  If suit is
brought to enforce any provision of this Agreement,  the prevailing  party shall
be  entitled  to  recover  its  reasonable  attorneys'  fees and court  costs in
addition to any other remedy or recovery awarded by the court.

7.04  Additional  Remedies.  The  rights,  powers  and  remedies  given  to Bank
hereunder  shall be cumulative and not  alternative  and shall be in addition to
all rights,  powers and  remedies  given to Bank by law against  Borrower or any
other  person,  including but not limited to Bank's rights of setoff or banker's
lien.

7.05 Inurement. The benefits of this Agreement shall inure to the successors and
assigns of Bank and the permitted successors and assigns of Borrower.

7.06  Applicable  Law. This Agreement and all other  agreements and  instruments
required by Bank in  connection  therewith  shall be  governed by and  construed
according to the laws of the state of California,  to the  jurisdiction of whose
courts the parties hereby agree to submit.

7.07 Offset.  In addition to and not in  limitation of all rights of offset that
Bank or other holder of the Loan may have under  applicable  law,  Bank or other
holder of any note issued hereunder  shall,  upon the occurrence of any Event of
Default or any event which with the passage of time or notice  would  constitute
such an Event of Default, have the right to appropriate and apply to the payment
of the Loan any and all  balances,  credits,  deposits,  accounts  or  monies of
Borrower  then or  thereafter  with Bank 

                                       10

<PAGE>

or other holder,  within ten (10) days after the Event of Default, and notice of
the occurrence of any Event of Default by Bank to Borrower.

7.08  Severability.  Should  any  one or more  provisions  of the  Agreement  be
determined to be illegal or  unenforceable,  all other  provisions  nevertheless
shall be effective.

7.09 Time of the Essence.  Time is hereby  declared to be of the essence of this
Agreement and of every part hereof.

7.10  Accounting.  All  accounting  terms shall have the meanings  applied under
generally accepted accounting principles unless otherwise specified.

7.11        Reference Provision.

(a)  Other  than (i)  nonjudicial  foreclosure  and all  matters  in  connection
therewith regarding security interests in real or personal property; or (ii) the
appointment of a receiver,  or the exercise of other  provisional  remedies (any
and all of which may be initiated pursuant to applicable law), each controversy,
dispute or claim  between the parties  arising out of or relating to this Credit
Agreement,  any security  agreement executed by Borrower in favor of Bank or any
note executed by Borrower in favor of Bank or any other  agreement or instrument
issued  in  favor  of Bank  by  Borrower  (collectively  in  this  Section,  the
"Agreement")  which  controversy,  dispute  or claim is not  settled  in writing
within  thirty (30) days after the "Claim Date"  (defined as the date on which a
party subject to this Agreement gives written notice to all other parties that a
controversy, dispute or claim exists), will be settled by a reference proceeding
in California in  accordance  with the  provisions of Section 638 et seq. of the
California Code of Civil Procedure,  or their successor  section ("CCP"),  which
shall  constitute the exclusive  remedy for the  settlement of any  controversy,
dispute or claim concerning this Agreement,  including whether such controversy,
dispute or claim is subject to the reference  proceeding and except as set forth
above, the parties waive their rights to initiate any legal proceedings  against
each other in any court or  jurisdiction  other than the  Superior  Court in the
County where the Real Property, if any, is located or Los Angeles County if none
(the  "Court").  The referee shall be a retired  Judge of the Court  selected by
mutual agreement of the parties,  and if they cannot so agree within  forty-five
(45) days after the Claim Date,  the referee  shall be promptly  selected by the
Presiding  Judge of the  Court (or his  representative).  The  referee  shall be
appointed  to sit as a temporary  judge,  with all of the powers for a temporary
judge, as authorized by law, and upon selection should take and subscribe to the
oath of office as provided for in Rule 244 of the California  Rules of Court (or
any subsequently  enacted Rule). Each party shall have one peremptory  challenge
pursuant to CCP  ss.170.6.  The referee shall (a) be requested to set the matter
for hearing  within  sixty (60) days after the date of  selection of the referee
and (b) try any and all issues of law or fact and report a statement of decision
upon them, if possible,  within ninety (90) days of the Claim Date. Any decision
rendered by the referee will be final, binding and conclusive and judgment shall
be entered pursuant to CCP ss.644 in any court in the state of California having
jurisdiction.  Any party may apply for a reference  proceeding at any time after
thirty  (30)  days  following  notice to any  other  party of the  nature of the
controversy,  dispute or claim, by filing a petition for a hearing and/or trial.
All  discovery  permitted  by this  Agreement  shall be  completed no later than
fifteen (15) days before the first hearing date established by the referee.  The
referee  may  extend  such  period in the event of a party's  refusal to provide
requested  discovery for any reason whatsoever,  including,  without limitation,
legal objections  raised to such discovery or unavailability of a witness due to
absence or  illness.  No party shall be entitled  to  "priority"  in  conducting
discovery.  Depositions may be taken by either party upon seven (7) days written
notice, and request for production or inspection of documents shall be responded
to within ten (10) days after service.  All disputes relating to discovery which

                                       11
<PAGE>

cannot be resolved  by the  parties  shall be  submitted  to the  referee  whose
decision shall be final and binding upon the parties. Pending appointment of the
referee as provided  herein,  the Superior Court is empowered to issue temporary
and/or provisional remedies, as appropriate.

(b) Except as expressly set forth in this Agreement, the referee shall determine
the manner in which the reference proceeding is conducted including the time and
place of all  hearings,  the order of  presentation  of evidence,  and all other
questions that arise with respect to the course of the reference proceeding. All
proceedings and hearings  conducted before the referee,  except for trial, shall
be conducted without a court reporter except that when any party so requests,  a
court  reporter will be used at any hearing  conducted  before the referee.  The
party making such a request shall have the obligation to arrange for and pay for
the court reporter.  The costs of the court reporter at the trial shall be borne
equally by the parties.

(c) The referee  shall be required to determine  all issues in  accordance  with
existing case law and the statutory laws of the state of  California.  The rules
of evidence  applicable to proceedings at law in the state of California will be
applicable to the reference proceeding.  The referee shall be empowered to enter
equitable as well as legal relief,  to provide all temporary and/or  provisional
remedies  and to enter  equitable  orders that will be binding upon the parties.
The  referee  shall  issue a  single  judgment  at the  close  of the  reference
proceeding  which shall dispose of all of the claims of the parties that are the
subject of the  reference.  The parties  hereto  expressly  reserve the right to
contest or appeal from the final judgment or any appealable  order or appealable
judgment entered by the referee.  The parties hereto expressly reserve the right
to findings of fact,  conclusions of laws, a written statement of decision,  and
the right to move for a new trial or a different  judgment,  which new trial, if
granted, is also to be a reference proceeding under this provision.

(d) In the event that the enabling legislation which provides for appointment of
a referee is repealed (and no successor statute is enacted), any dispute between
the parties that would otherwise be determined by the reference procedure herein
described will be resolved and determined by arbitration.  The arbitration  will
be conducted by a retired judge of the Court,  in accordance with the California
Arbitration  Act,  ss.1280 through  ss.1294.2 of the CCP as amended from time to
time. The limitations with respect to discovery as set forth  hereinabove  shall
apply to any such arbitration proceeding.

7.12 This  Agreement  may be  modified  only by a writing  signed by all parties
hereto.

This Agreement is executed on behalf of the parties by duly authorized  officers
as of the date first above written.

IMPERIAL BANK                             Research Engineers, Inc.
("Bank")                                  ("Borrower")


By: /S/ LEILA GHOROGHCHI                  By: /S/ JYOTI CHATTERJEE
   ---------------------------------          --------------------
Its: Vice President                       Its: EVP/COO
                                     
                                          By: /S/ WAYNE BLAIR
                                              --------------------
                                          Its: CFO and Secretary


                                       12
<PAGE>

Exhibit 1.11
<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------
                        Surrender Value as
Company     Policy #        of 1/27/99      Annuitant    Owner      Beneficiary
- ------------------------------------------------------------------------------------
<S>        <C>          <C>                 <C>        <C>         <C>              
KP (a)     KA00489362        $189,151       Amrit Das  Amrit Das    Amrit K. Das
KP         KA00713744        $ 78,574       Amrit Das  Amrit Das    Amrit K. Das
KP         KA00733340        $ 58,006       Amrit Das  Amrit Das    Amrit K. Das
KP         KA00733341        $ 58,423       Amrit Das  Amrit Das    Amrit K. Das
KP         KA00738223        $ 71,925       Amrit Das  Amrit Das   Sormistha Das
SU (b)    A0095504940        $255,240       Amrit Das  Amrit Das    Amrit K. Das
USG (c)      542942          $ 85,430       Amrit Das  Amrit Das    Amrit K. Das

Total                        $796,749
- ------------------------------------------------------------------------------------




<FN>

a. KP is    Keyport Life Insurance
            125 High Street
            Boston, MA 02110

b. SU is    Sun Life Insurance Co. of America
            1 SunAmerica Center
            Century City
            Los Angeles, CA 90067

c. USG      USG Annuity & Life Co.
            909 Locust Street
            Des Moines IA 50309

</FN>
</TABLE>

                                       13


<PAGE>






Exhibit 2.08



                                SOFTWARE

Borrower to register copyrights for all versions of the following:

<TABLE>
<S> <C>  

1.  STAAD
       STAAD - III
       STAAD / PRO

2.  AutoCIVIL

3.  FABRICAD

4.  STARDYNE
</TABLE>


                                       14


<PAGE>


                                                                     Exhibit 2.5
                             IMPERIAL BANK
                              Member FDIC

                       GENERAL SECURITY AGREEMENT
              (Tangible and Intangible Personal Property)

This Agreement is executed on February 26, 1999, by RESEARCH ENGINEERS,  INC., A
DELAWARE CORPORATION (hereinafter called "Obligor").

In  consideration of financial  accommodations  given, to be given or continued,
the  Obligor  grants to IMPERIAL  BANK  (hereinafter  called  'Bank") a security
interest in (a) all property (i) delivered to Bank by Obligor,  (ii) which shall
be in Bank's  possession  or  control in any  matter or for any  purpose,  (iii)
described below, (iv) now owned or hereafter  acquired by Obligor of the type or
class described below and/or in any  supplementary  schedule  hereto,  or in any
financing  statement filed by Bank and executed by or on behalf of Obligor;  (b)
all  deposits  accounts of Obligor at Bank and (c) the  proceeds,  increase  and
products of such  property,  all  accessions  thereto,  and all  property  which
Obligor may receive on account of such collateral which Obligor will immediately
deliver to Bank (collectively referred to as "Collateral") to secure payment and
performance of all of Obligor's  present or future debts or obligations to Bank,
whether  absolute  or  contingent  (hereafter  referred  to as  "Debt").  Unless
otherwise  defined,  words  used  herein  have the  meanings  given  them in the
California Uniform Commercial Code.

Collateral:

A.  VEHICLE, VESSEL, AIRCRAFT:
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------
                                    Identification    License or
Year   Make/Manufacturer    Model   and Serial No.  Registration No. New or Used
- --------------------------------------------------------------------------------
<S>    <C>                  <C>     <C>             <C>              <C>




- --------------------------------------------------------------------------------
</TABLE>


Engine or other equipment: 
                          ------------------------------------------------------
(For aircraft - original ink signature on copy to FAA)

B.  DEPOSIT ACCOUNTS:
Type                    Account Number                         Amount $
    -------------------                -----------------------         --------
In name of
           ---------------------------------------------------------------------
Depository                               AND ALL EXTENSIONS OR RENEWALS THEREOF.
           -----------------------------

C.  ACCOUNTS, INTANGIBLES AND OTHER: (Describe)

All personal property of every kind including furniture, fixtures, equipment and
inventory, including building materials and leasehold improvements of every kind
and nature, all engineering reports, land planning maps, plans,  specifications,
and other  exhibits  prepared in the planning of the real  property now owned or
hereafter  acquired  by Obligor,  and all  proceeds  thereof,  intended to be or
actually  located at, upon or about or attached or related to the real  property
located at 
                22700 Savi Ranch Parkway, Yorba Linda, CA 92687
                -----------------------------------------------
and legally  described as shown on Exhibit "A" attached hereto together with the
proceeds of insurance policies issued with respect to said property.


The collateral not in Bank's possession will be located at:

|_| If checked,  the Obligor is executing  this  Agreement  as an  Accommodation
Debtor only and the  Obligor's  liability  is limited to the  security  interest
granted in the Collateral  described  herein.  The party being  accommodated  is
("Borrower").  All the terms and  provisions  on page 2 hereof are  incorporated
herein as though set forth in full, and constitute a part of this Agreement.
                                 Signature
     Name              (indicate title, if applicable)          Address
RESEARCH ENGINEERS, INC.,   By: /S/ JYOTI CHATTERJEE    22700 Savi Ranch Parkway
A DELAWARE CORPORATION          --------------------    Yorba Linda, CA 92687
                            Jyoti Chatterjee, EVP/COO     

                              By: /S/ WAYNE BLAIR  
                                  ------------------         
                           Wayne L. Blair, CFO/Secretary

RE 213 E (Rev 9/97)       Distribution: Bank/Customer/File           Page 1 of 2



<PAGE>


                     SECURITY AGREEMENT (CONTINUED)

Obligor represents, warrants and agrees:
1.  Obligor  will  immediately  pay (a) any Debt when due,  (b) Bank's  costs of
collecting the Debt, of protecting, insuring or realizing on Collateral, and any
expenditure of Bank pursuant  hereto,  including  attorneys'  fees and expenses,
with interest at the rate of 24% per year,  or the rate  applicable to the Debt,
whichever is less,  from the date of expenditure,  and (c) any deficiency  after
realization of Collateral.

2. Obligor will use the proceeds of any loan that becomes Debt hereunder for the
purpose  indicated on the application  therefore,  and will promptly contract to
purchase and pay the purchase  price of any property  which  becomes  Collateral
hereunder  from the  proceeds  of any loan made for that  purpose.  

3. As to all Collateral in Obligor's possession (unless  specifically  otherwise
agreed to by Bank in writing), Obligor will:  
     (a)  Have, or has,  possession of the Collateral at the location  disclosed
          to Bank and will not remove the Collateral from the location.
     (b)  Keep the Collateral separate and identifiable.    
     (c)  Maintain the Collateral in good and saleable  condition,  repair it if
          necessary,   clean,  feed,  shelter,   water,   medicate,   fertilize,
          cultivate,  irrigate,  prune and otherwise deal with the Collateral in
          all such  ways as are  considered  good  practice  by  owners  of like
          property, use it lawfully and only as permitted by insurance policies,
          and permit Bank to inspect the Collateral at any reasonable time.   
     (d)  Not sell, contract to sell, lease, encumber or transfer the Collateral
          (other than inventory  Collateral)  until the Debt has been paid, even
          though Bank has a security interest in proceeds of such Collateral.

4.   As to Collateral which is inventory and accounts,  Obligor:  
     (a)  May,  until  notice from Bank,  sell,  lease or  otherwise  dispose of
          inventory  Collateral  in the ordinary  course of business  only,  and
          collect the cash proceeds thereof.
     (b)  Will, upon notice from Bank,  deposit all cash proceeds as received in
          a demand deposit account with Bank,  containing only such proceeds and
          deliver  statements   identifying  units  of  inventory  disposed  of,
          accounts which gave rise to proceeds, and all acquisitions and returns
          of inventory as required by Bank. 
     (c)  Will receive in trust,  schedule on forms satisfactory to the Bank and
          deliver to Bank all non-cash proceeds other than inventory received in
          trade.
     (d)  If not in default, may obtain release of Bank's interest in individual
          units of inventory  upon  request,  therefore,  payment to Bank of the
          release  price  of  such  units  shown  on  any  Collateral   schedule
          supplementary hereto, and compliance herewith as to proceeds thereof.

5. As to Collateral which are accounts,  chattel paper,  general intangibles and
   proceeds described in 4(c) above, Obligor warrants, represents and agrees:
     (a)  All such  Collateral is genuine,  enforceable  in accordance  with its
          terms, free from default, prepayment, defense and conditions precedent
          (except as  disclosed  to and  accepted  by Bank in  writing),  and is
          supported by  consecutively  numbered  invoices to, or rights against,
          the debtors thereon.  obligor will supply Bank with duplicate invoices
          or other evidence of Obligor's rights on Bank's request;
     (b)  All  persons  appearing  to  be  obligated  on  such  Collateral  have
          authority and capacity to contract;
     (c)  All chattel  paper is in compliance  with law as to form,  content and
          manner of preparation and execution and has been properly  registered,
          recorded, and/or filed to protect Obligor's interest thereunder;
     (d)  If an  account  debtor  shall also be  indebted  to Obligor on another
          obligation,  any payment made by him not specifically designated to be
          applied  on any  particular  obligation  shall be  considered  to be a
          payment on the account in which Bank has a security  interest.  Should
          any  remittance  include  a  payment  not on an  account,  it shall be
          delivered to Bank and, if no event of default has occurred, Bank shall
          pay Obligor the amount of such payment;
     (e)  Obligor  agrees not to  compromise,  settle or adjust  any  account or
          renew or extend  the time of  payment  thereof  without  Bank's  prior
          written consent.

6. Obligor owns all Collateral absolutely, and no other person has or claims any
   interest in any  Collateral,  except as  disclosed to and accepted by Bank in
   writing.  Obligor  will defend any  proceeding  which may affect  title to or
   Bank's security interest in any Collateral,  and will indemnify and hold Bank
   free and harmless from all costs and expenses of Bank's defense.

7. Obligor  will  pay  when  due  all  existing  or  future  charges,  liens  or
   encumbrances on and all taxes and assessments now or hereafter  imposed on or
   affecting the Collateral  and, if the Collateral is in Obligor's  possession,
   the realty on which the Collateral is located.

8. Obligor  will  insure  the  Collateral  with  Bank as loss  payee in form and
   amounts with companies, and against risks and liability satisfactory to Bank,
   and hereby  assigns such policies to Bank,  agrees to deliver them to Bank at
   Bank's request,  and authorizes Bank to make any claim thereunder,  to cancel
   the insurance on Obligor's default, and to receive payment of and endorse any
   instrument in payment of any loss or return  premium.  If Obligor should fail
   to  deliver  the  required  policy  or  policies  to the Bank,  Bank may,  at
   Obligor's  cost  and  expense,  without  any  duty to do so,  get and pay for
   insurance  naming as the insured,  at Bank's option,  either both Obligor and
   Bank,  or only Bank,  and the cost thereof  shall be secured by this Security
   Agreement, and shall be repayable as provided in Paragraph 1 above.

9. Obligor will give Bank any  information it requires.  All  information at any
   time  supplied to Bank by Obligor  (including,  but not limited to, the value
   and condition of Collateral,  financial statements, financing statements, and
   statements  made in  documentary  Collateral)  is correct and  complete,  and
   Obligor will notify Bank of any adverse change in such  information.  Obligor
   will  promptly  notify  Bank of any  change  of  Obligor's  residence.  chief
   executive office or mailing address.

10.Bank is irrevocably appointed Obligor's  attorney-in-fact to do any act which
   Obligor is  obligated  hereby to do, to  exercise  such rights as Obligor may
   exercise,  to use such  equipment  as Obligor  might use, to enter  Obligor's
   premises  to  give  notice  of  Bank's  security  interest,  and  to  collect
   Collateral  and  proceeds  and to  execute  and  file in  Obligor's  name any
   financing  statements  and  amendments  thereto  required  to perfect  Bank's
   security interest  hereunder,  all to protect and preserve the Collateral and
   Bank's rights hereunder. Bank may:
     (a)  Endorse,  collect and receive  delivery or payment of instruments  and
          documents constituting Collateral;
     (b)  Make  extension  agreements  with respect to or affecting  Collateral,
          exchange it for other  Collateral,  release  persons liable thereon or
          take  security for the payment  thereof,  and  compromise  disputes in
          connection therewith;
     (c)  Use or operate Collateral for the purpose of preserving  Collateral or
          its value and for preserving or liquidating Collateral.

11.If more than one Obligor signs this  Agreement,  their liability is joint and
   several.  Any Obligor who is married  agrees that recourse may be had against
   separate  property  for the Debt.  Discharge  of any Obligor  except for full
   payment,  or any  extension,  forbearance,  change  of rate of  interest,  or
   acceptance,  release or  substitution  of  Collateral  or any  impairment  or
   suspension  of Bank's  rights  against  an  Obligor,  or any  transfer  of an
   Obligor's  interest to another  shall not affect the  liability  of any other
   Obligor.  Until the Debt shall have been paid or  performed  in full,  Bank's
   rights shall continue even if the Debt is outlawed.  All Obligors waive:  (a)
   any right to require Bank to proceed against any Obligor before any other, or
   to pursue any other remedy;  (b) presentment,  protest and notice of protest,
   demand and notice of nonpayment,  demand or performance,  notice of sale, and
   advertisement  of sale;  (c) any right to the  benefit  of or to  direct  the
   application  of any  Collateral  until the Debt shall have been paid; (d) and
   any right of subrogation to Bank until Debt shall have been paid or performed
   in full.

12.Upon default, at Bank's option,  without demand or notice, all or any part of
   the Debt shall  immediately  become due.  Bank shall have all rights given by
   law, and may sell, in one or more sales,  Collateral in any county where Bank
   has an office. Bank may purchase at such sale. Sales for cash or on credit to
   a  wholesaler,  retailer or user of the  Collateral,  or at public or private
   auction, are all to be considered commercially  reasonable.  Bank may require
   Obligor to  assemble  the  Collateral  and make it  available  to Bank at the
   entrance to the location of the Collateral, or a place designated by Bank.

    Defaults shall include:
     (a)  Obligor's failure to pay or perform this or any agreement with Bank or
          breach of any warranty herein, or Borrower's failure to pay or perform
          any agreement with Bank.
     (b)  Any change in Obligor's or  Borrower's  financial  condition  which in
          Bank's  judgment  impairs  the  prospect  of  Borrower's   payment  or
          performance.
     (c)  Any actual or reasonably  anticipated  deterioration of the Collateral
          or in the market price thereof which causes it, in Bank's judgment, to
          become unsatisfactory as security.
     (d)  Any levy or seizure against Borrower or any of the Collateral.
     (e)  Death, termination of business, assignment for creditors,  insolvency,
          appointment  of  receiver,   or  the  filing  of  any  petition  under
          bankruptcy  or  debtor's  relief  laws of, by or  against  Obligor  or
          Borrower or any guarantor of the Debt.
     (f)  Any warranty or  representation  which is false or is believed in good
          faith by Bank to be false.

13.Bank's  acceptance of partial or  delinquent  payments or the failure of Bank
   to exercise any right or remedy shall not waive any  obligation of Obligor or
   Borrower  or right of Bank to  modify  this  Agreement,  or waive  any  other
   similar default.

14.On  transfer  of all or any part of the Debt,  Bank may  transfer  all or any
   part of the Collateral. Bank may deliver all or any part of the Collateral to
   any Obligor at any time. Any such transfer or delivery  shall  discharge Bank
   from  all  liability  and  responsibility  with  respect  to such  Collateral
   transferred  or delivered.  This  Agreement  benefits  Bank's  successors and
   assigns  and  binds  Obligor's  heirs,  legatees,  personal  representatives,
   successors and assigns.  obligor agrees not to assert against any assignee of
   Bank any  claim  or  defense  that may  exist  against  Bank.  Time is of the
   essence. This Agreement and supplementary schedules hereto contain the entire
   security  agreement  between  Bank and  Obligor.  Obligor  will  execute  any
   additional  agreements,  assignments or documents reasonably required by Bank
   to carry this Agreement into effect.

15.This  Agreement  shall be governed by and  construed in  accordance  with the
   laws of the State of  California,  to the  jurisdiction  of whose  courts the
   Obligor  hereby agrees to submit.  Obligor agrees that service of process may
   be  accomplished  by any means  authorized by California  law. All words used
   herein in the singular  shall be  considered  to have been used in the plural
   where the context and construction so require.

16.To the extent that Obligor  acquires any  trademarks,  service  marks,  trade
   names and service names and/or the goodwill associated therewith, copyrights,
   patents and/or patent  applications  (collectively  'Intellectual  Property),
   Obligor shall give prompt  notice  thereof to Bank and shall take any and all
   actions requested from time to time by Bank to perfect Obligor's  interest in
   such  Intellectual  Property and to perfect  Bank's first  priority  interest
   therein. Without limiting the generality of the foregoing, the Obligor agrees
   as follows:  Upon Obligor  creating,  writing,  producing  or  acquiring  any
   software, computer source codes or other computer programs (collectively, the
   'Software'),  Obligor  shall  promptly  register  such Software with the U.S.
   Copyright Office and to the extent Obligor's rights therein are acquired from
   any third party,  Obligor shall promptly upon such  acquisition file with the
   U.S.  Copyright Office any and all documents  necessary to perfect  Obligor's
   rights  therein.  Upon  Obligor  creating,  writing,  producing  or otherwise
   acquiring  any Software,  Obligor  shall give prompt notice  thereof to Bank.
   Obligor shall  execute and deliver to Bank any and all  copyright  mortgages,
   UCC financing  statements and other documents and instruments  which Bank may
   request in connection  with the Bank  perfecting its first priority  security
   interest in such Software.

RE 213 E (Rev9/97)                                                   Page 2 of 2



<PAGE>


                              EXHIBIT "A"



PARCEL 2 OF PARCEL MAP NO. 86-316, IN THE CITY OF YORBA LINDA, COUNTY OF ORANGE,
STATE OF  CALIFORNIA,  AS PER MAP  RECORDED  IN BOOK 270 PAGES 1 AND 2 OF PARCEL
MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY.



  This Exhibit is made a part of that General  Security  Agreement dated 2/26/99
  executed by Research Engineers, Inc., a Delaware corporation




<PAGE>
                                                                     Exhibit 2.6

                       GENERAL SECURITY AGREEMENT
              (Tangible and Intangible Personal Property)
                             IMPERIAL BANK
                              Member FDIC

This Agreement is executed on February 26, 1999 , by RESEARCH ENGINEERS, INC., A
DELAWARE CORPORATION (hereinafter called "Obligor").

In  consideration of financial  accommodations  given, to be given or continued,
the  Obligor  grants to IMPERIAL  BANK  (hereinafter  called  "Bank") a security
interest in (a) all property (i) delivered to Bank by Obligor,  (ii) which shall
be in Bank's  possession  or  control in any  matter or for any  purpose,  (iii)
described below, (iv) now owned or hereafter  acquired by Obligor of the type or
class described below and/or in any  supplementary  schedule  hereto,  or in any
financing  statement filed by Bank and executed by or on behalf of Obligor;  (b)
all  deposits  accounts of Obligor at Bank and (c) the  proceeds,  increase  and
products of such  property,  all  accessions  thereto,  and all  property  which
Obligor may receive on account of such collateral which Obligor will immediately
deliver to Bank (collectively referred to as "Collateral") to secure payment and
performance of all of Obligor's  present or future debts or obligations to Bank,
whether  absolute  or  contingent  (hereafter  referred  to as  "Debt").  Unless
otherwise  defined,  words  used  herein  have the  meanings  given  them in the
California Uniform Commercial Code.



Collateral:

A.  VEHICLE, VESSEL, AIRCRAFT:
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                    Identification    License or
Year   Make/Manufacturer    Model   and Serial No.  Registration No. New or Used
- --------------------------------------------------------------------------------
<S>    <C>                  <C>     <C>             <C>              <C>



- --------------------------------------------------------------------------------
</TABLE>


Engine or other equipment: 
                          ------------------------------------------------------
(For aircraft - original ink signature on copy to FAA)

B.  DEPOSIT ACCOUNTS:
Type                    Account Number                         Amount $
    -------------------                -----------------------         --------
In name of
           ---------------------------------------------------------------------
Depository                               AND ALL EXTENSIONS OR RENEWALS THEREOF.
           -----------------------------

C.  ACCOUNTS, INTANGIBLES AND OTHER: (Describe)

SEE EXHIBIT "A" ATTACHED HERETO AND MADE A PART HEREOF BY THIS REFERENCE.


The collateral not in Bank's possession will be located at: 22700 Savi
Ranch Parkway, Yorba Linda, CA 92687

|_| If checked,  the Obligor is executing  this  Agreement  as an  Accommodation
Debtor only and the  Obligor's  liability  is limited to the  security  interest
granted in the Collateral  described  herein.  The party being  accommodated  is
("Borrower").  All the terms and  provisions  on page 2 hereof are  incorporated
herein as though set forth in full, and constitute a part of this Agreement.
                                 Signature
     Name              (indicate title, if applicable)          Address
RESEARCH ENGINEERS, INC.,   By: /S/ JYOTI CHATTERJEE    22700 Savi Ranch Parkway
A DELAWARE CORPORATION          --------------------    Yorba Linda, CA 92687
                            Jyoti Chatterjee, EVP/COO     

                              By: /S/ WAYNE BLAIR  
                                  ------------------         
                           Wayne L. Blair, CFO/Secretary

L 552 E (Rev 9/97)        Distribution: Bank/Customer/File           Page 1 of 2


<PAGE>


                     SECURITY AGREEMENT (CONTINUED)

Obligor represents, warrants and agrees:
1.  Obligor  will  immediately  pay (a) any Debt when due,  (b) Bank's  costs of
collecting the Debt, of protecting, insuring or realizing on Collateral, and any
expenditure of Bank pursuant  hereto,  including  attorneys'  fees and expenses,
with interest at the rate of 24% per year,  or the rate  applicable to the Debt,
whichever is less,  from the date of expenditure,  and (c) any deficiency  after
realization of Collateral.

2. Obligor will use the proceeds of any loan that becomes Debt hereunder for the
purpose  indicated on the application  therefore,  and will promptly contract to
purchase and pay the purchase  price of any property  which  becomes  Collateral
hereunder  from the  proceeds  of any loan made for that  purpose.  

3. As to all Collateral in Obligor's possession (unless  specifically  otherwise
agreed to by Bank in writing), Obligor will:  
     (a)  Have, or has,  possession of the Collateral at the location  disclosed
          to Bank and will not remove the Collateral from the location.
     (b)  Keep the Collateral separate and identifiable.    
     (c)  Maintain the Collateral in good and saleable  condition,  repair it if
          necessary,   clean,  feed,  shelter,   water,   medicate,   fertilize,
          cultivate,  irrigate,  prune and otherwise deal with the Collateral in
          all such  ways as are  considered  good  practice  by  owners  of like
          property, use it lawfully and only as permitted by insurance policies,
          and permit Bank to inspect the Collateral at any reasonable time.   
     (d)  Not sell, contract to sell, lease, encumber or transfer the Collateral
          (other than inventory  Collateral)  until the Debt has been paid, even
          though Bank has a security interest in proceeds of such Collateral.

4.   As to Collateral which is inventory and accounts,  Obligor:  
     (a)  May,  until  notice from Bank,  sell,  lease or  otherwise  dispose of
          inventory  Collateral  in the ordinary  course of business  only,  and
          collect the cash proceeds thereof.
     (b)  Will, upon notice from Bank,  deposit all cash proceeds as received in
          a demand deposit account with Bank,  containing only such proceeds and
          deliver  statements   identifying  units  of  inventory  disposed  of,
          accounts which gave rise to proceeds, and all acquisitions and returns
          of inventory as required by Bank. 
     (c)  Will receive in trust,  schedule on forms satisfactory to the Bank and
          deliver to Bank all non-cash proceeds other than inventory received in
          trade.
     (d)  If not in default, may obtain release of Bank's interest in individual
          units of inventory  upon  request,  therefore,  payment to Bank of the
          release  price  of  such  units  shown  on  any  Collateral   schedule
          supplementary hereto, and compliance herewith as to proceeds thereof.

5. As to Collateral which are accounts,  chattel paper,  general intangibles and
   proceeds described in 4(c) above, Obligor warrants, represents and agrees:
     (a)  All such  Collateral is genuine,  enforceable  in accordance  with its
          terms, free from default, prepayment, defense and conditions precedent
          (except as  disclosed  to and  accepted  by Bank in  writing),  and is
          supported by  consecutively  numbered  invoices to, or rights against,
          the debtors thereon.  obligor will supply Bank with duplicate invoices
          or other evidence of Obligor's rights on Bank's request;
     (b)  All  persons  appearing  to  be  obligated  on  such  Collateral  have
          authority and capacity to contract;
     (c)  All chattel  paper is in compliance  with law as to form,  content and
          manner of preparation and execution and has been properly  registered,
          recorded, and/or filed to protect Obligor's interest thereunder;
     (d)  If an  account  debtor  shall also be  indebted  to Obligor on another
          obligation,  any payment made by him not specifically designated to be
          applied  on any  particular  obligation  shall be  considered  to be a
          payment on the account in which Bank has a security  interest.  Should
          any  remittance  include  a  payment  not on an  account,  it shall be
          delivered to Bank and, if no event of default has occurred, Bank shall
          pay Obligor the amount of such payment;
     (e)  Obligor  agrees not to  compromise,  settle or adjust  any  account or
          renew or extend  the time of  payment  thereof  without  Bank's  prior
          written consent.

6. Obligor owns all Collateral absolutely, and no other person has or claims any
   interest in any  Collateral,  except as  disclosed to and accepted by Bank in
   writing.  Obligor  will defend any  proceeding  which may affect  title to or
   Bank's security interest in any Collateral,  and will indemnify and hold Bank
   free and harmless from all costs and expenses of Bank's defense.

7. Obligor  will  pay  when  due  all  existing  or  future  charges,  liens  or
   encumbrances on and all taxes and assessments now or hereafter  imposed on or
   affecting the Collateral  and, if the Collateral is in Obligor's  possession,
   the realty on which the Collateral is located.

8. Obligor  will  insure  the  Collateral  with  Bank as loss  payee in form and
   amounts with companies, and against risks and liability satisfactory to Bank,
   and hereby  assigns such policies to Bank,  agrees to deliver them to Bank at
   Bank's request,  and authorizes Bank to make any claim thereunder,  to cancel
   the insurance on Obligor's default, and to receive payment of and endorse any
   instrument in payment of any loss or return  premium.  If Obligor should fail
   to  deliver  the  required  policy  or  policies  to the Bank,  Bank may,  at
   Obligor's  cost  and  expense,  without  any  duty to do so,  get and pay for
   insurance  naming as the insured,  at Bank's option,  either both Obligor and
   Bank,  or only Bank,  and the cost thereof  shall be secured by this Security
   Agreement, and shall be repayable as provided in Paragraph 1 above.

9. Obligor will give Bank any  information it requires.  All  information at any
   time  supplied to Bank by Obligor  (including,  but not limited to, the value
   and condition of Collateral,  financial statements, financing statements, and
   statements  made in  documentary  Collateral)  is correct and  complete,  and
   Obligor will notify Bank of any adverse change in such  information.  Obligor
   will  promptly  notify  Bank of any  change  of  Obligor's  residence.  chief
   executive office or mailing address.

10.Bank is irrevocably appointed Obligor's  attorney-in-fact to do any act which
   Obligor is  obligated  hereby to do, to  exercise  such rights as Obligor may
   exercise,  to use such  equipment  as Obligor  might use, to enter  Obligor's
   premises  to  give  notice  of  Bank's  security  interest,  and  to  collect
   Collateral  and  proceeds  and to  execute  and  file in  Obligor's  name any
   financing  statements  and  amendments  thereto  required  to perfect  Bank's
   security interest  hereunder,  all to protect and preserve the Collateral and
   Bank's rights hereunder. Bank may:
     (a)  Endorse,  collect and receive  delivery or payment of instruments  and
          documents constituting Collateral;
     (b)  Make  extension  agreements  with respect to or affecting  Collateral,
          exchange it for other  Collateral,  release  persons liable thereon or
          take  security for the payment  thereof,  and  compromise  disputes in
          connection therewith;
     (c)  Use or operate Collateral for the purpose of preserving  Collateral or
          its value and for preserving or liquidating Collateral.

11.If more than one Obligor signs this  Agreement,  their liability is joint and
   several.  Any Obligor who is married  agrees that recourse may be had against
   separate  property  for the Debt.  Discharge  of any Obligor  except for full
   payment,  or any  extension,  forbearance,  change  of rate of  interest,  or
   acceptance,  release or  substitution  of  Collateral  or any  impairment  or
   suspension  of Bank's  rights  against  an  Obligor,  or any  transfer  of an
   Obligor's  interest to another  shall not affect the  liability  of any other
   Obligor.  Until the Debt shall have been paid or  performed  in full,  Bank's
   rights shall continue even if the Debt is outlawed.  All Obligors waive:  (a)
   any right to require Bank to proceed against any Obligor before any other, or
   to pursue any other remedy;  (b) presentment,  protest and notice of protest,
   demand and notice of nonpayment,  demand or performance,  notice of sale, and
   advertisement  of sale;  (c) any right to the  benefit  of or to  direct  the
   application  of any  Collateral  until the Debt shall have been paid; (d) and
   any right of subrogation to Bank until Debt shall have been paid or performed
   in full.

12.Upon default, at Bank's option,  without demand or notice, all or any part of
   the Debt shall  immediately  become due.  Bank shall have all rights given by
   law, and may sell, in one or more sales,  Collateral in any county where Bank
   has an office. Bank may purchase at such sale. Sales for cash or on credit to
   a  wholesaler,  retailer or user of the  Collateral,  or at public or private
   auction, are all to be considered commercially  reasonable.  Bank may require
   Obligor to  assemble  the  Collateral  and make it  available  to Bank at the
   entrance to the location of the Collateral, or a place designated by Bank.

    Defaults shall include:
     (a)  Obligor's failure to pay or perform this or any agreement with Bank or
          breach of any warranty herein, or Borrower's failure to pay or perform
          any agreement with Bank.
     (b)  Any change in Obligor's or  Borrower's  financial  condition  which in
          Bank's  judgment  impairs  the  prospect  of  Borrower's   payment  or
          performance.
     (c)  Any actual or reasonably  anticipated  deterioration of the Collateral
          or in the market price thereof which causes it, in Bank's judgment, to
          become unsatisfactory as security.
     (d)  Any levy or seizure against Borrower or any of the Collateral.
     (e)  Death, termination of business, assignment for creditors,  insolvency,
          appointment  of  receiver,   or  the  filing  of  any  petition  under
          bankruptcy  or  debtor's  relief  laws of, by or  against  Obligor  or
          Borrower or any guarantor of the Debt.
     (f)  Any warranty or  representation  which is false or is believed in good
          faith by Bank to be false.

13.Bank's  acceptance of partial or  delinquent  payments or the failure of Bank
   to exercise any right or remedy shall not waive any  obligation of Obligor or
   Borrower  or right of Bank to  modify  this  Agreement,  or waive  any  other
   similar default.

14.On  transfer  of all or any part of the Debt,  Bank may  transfer  all or any
   part of the Collateral. Bank may deliver all or any part of the Collateral to
   any Obligor at any time. Any such transfer or delivery  shall  discharge Bank
   from  all  liability  and  responsibility  with  respect  to such  Collateral
   transferred  or delivered.  This  Agreement  benefits  Bank's  successors and
   assigns  and  binds  Obligor's  heirs,  legatees,  personal  representatives,
   successors and assigns.  obligor agrees not to assert against any assignee of
   Bank any  claim  or  defense  that may  exist  against  Bank.  Time is of the
   essence. This Agreement and supplementary schedules hereto contain the entire
   security  agreement  between  Bank and  Obligor.  Obligor  will  execute  any
   additional  agreements,  assignments or documents reasonably required by Bank
   to carry this Agreement into effect.

15.This  Agreement  shall be governed by and  construed in  accordance  with the
   laws of the State of  California,  to the  jurisdiction  of whose  courts the
   Obligor  hereby agrees to submit.  Obligor agrees that service of process may
   be  accomplished  by any means  authorized by California  law. All words used
   herein in the singular  shall be  considered  to have been used in the plural
   where the context and construction so require.

16.To the extent that Obligor  acquires any  trademarks,  service  marks,  trade
   names and service names and/or the goodwill associated therewith, copyrights,
   patents and/or patent  applications  (collectively  'Intellectual  Property),
   Obligor shall give prompt  notice  thereof to Bank and shall take any and all
   actions requested from time to time by Bank to perfect Obligor's  interest in
   such  Intellectual  Property and to perfect  Bank's first  priority  interest
   therein. Without limiting the generality of the foregoing, the Obligor agrees
   as follows:  Upon Obligor  creating,  writing,  producing  or  acquiring  any
   software, computer source codes or other computer programs (collectively, the
   'Software'),  Obligor  shall  promptly  register  such Software with the U.S.
   Copyright Office and to the extent Obligor's rights therein are acquired from
   any third party,  Obligor shall promptly upon such  acquisition file with the
   U.S.  Copyright Office any and all documents  necessary to perfect  Obligor's
   rights  therein.  Upon  Obligor  creating,  writing,  producing  or otherwise
   acquiring  any Software,  Obligor  shall give prompt notice  thereof to Bank.
   Obligor shall  execute and deliver to Bank any and all  copyright  mortgages,
   UCC financing  statements and other documents and instruments  which Bank may
   request in connection  with the Bank  perfecting its first priority  security
   interest in such Software.

L 552 E (Rev 9/97)                                                   Page 2 of 2


<PAGE>


Attachment to General Security Agreement

                  EXHIBIT "A" COLLATERAL DESCRIPTION
                  ----------------------------------

All personal  property of Obligor (herein  referred to as "Obligor" or "Debtor')
whether presently existing or hereafter created,  written, produced or acquired,
including,  but not limited to: (i) all accounts receivable,  accounts,  chattel
paper,  contract rights  (including,  without  limitation,  royalty  agreements,
license agreements and distribution agreements),  documents, instruments, money,
deposit accounts and general intangibles including, without limitation, returns,
repossessions, books and records relating thereto, and equipment containing said
books and records,  all investment property including  securities and securities
entitlement,  (ii) all  software,  computer  source  codes  and  other  computer
programs  (collectively,  the  "Software  Products"),  and  all  common  law and
statutory copyrights and copyright registrations, applications for registration,
now  existing  or  hereafter  arising,  United  States of America  and  foreign,
obtained or to be obtained on or in connection  with the Software  Products,  or
any parts  thereof or any  underlying  or  component  elements  of the  Software
Products  together with the right to copyright and all rights to renew or extend
such copyrights and the right (but not the obligation) of Bank (herein  referred
to as "Bank" or  "Secured  Party") to sue in its own name  and/or in the name of
the Debtor for past, present, and future  infringements of copyright,  (iii) all
goods including, without limitation, equipment and inventory (including, without
limitation,  all  export  inventory),  (iv) all  guarantees  and other  security
therefor,  (v) all trademarks,  service marks, trade names and service names and
the goodwill associated therewith,  (vi) (a) all patents and patent applications
filed in the United States Patent and Trademark  Office or any similar office of
any  foreign  jurisdiction,  and  interests  under  patent  license  agreements,
including,  without  limitation,  the inventions and improvements  described and
claimed  therein,  (b)  licenses  pertaining  to any  patent  whether  Debtor is
licensor or licensee, (c) all income, royalties, damages, payments, accounts and
accounts  receivable  now or hereafter due and/or payable under and with respect
thereto, including,  without limitation,  damages and payments for past, present
or future  infringements  thereof, (d) the right (but not the obligation) to sue
for past,  present  and future  thereof,  (e) all rights  corresponding  thereto
throughout the world in all jurisdictions in which such patents have been issued
or  applied  for,  and (f) the  reissues,  divisions,  continuations,  renewals,
extensions  and  continuations-in-part  with  any of the  foregoing  (all of the
foregoing   patents  and   applications   and  interests  under  patent  license
agreements, together with the items described in clauses (a) through (f) in this
paragraph are sometimes herein individually and collectively  referred to as the
"Patents"),  and (vii) all products and proceeds including,  without limitation,
insurance proceeds, of any of the foregoing.
      To the extent that Obligor acquires any trademarks,  service marks,  trade
names and service names and/or the goodwill  associated  therewith,  copyrights,
patents  and/or  patent  applications  (collectively  "Intellectual  Property"),
Obligor  shall  give  prompt  notice  thereof to Bank and shall take any and all
actions  reasonably  requested  from time to time by Bank to  perfect  Obligor's
interest in such  Intellectual  Property and to perfect  Bank's  first  priority
security interest therein. Without limiting the generality of the foregoing, the
Obligor further agrees as follows: Upon Obligor creating,  writing, producing or
acquiring  any  material  software,  computer  source  codes or  other  computer
programs  (collectively,  the "Software"),  Obligor shall promptly register such
Software  with the  U.S.  Copyright  Office  before  selling  or  licensing  the
Software, and to the extent Obligor's rights therein are acquired from any third
party, Obligor shall promptly upon such acquisition file with the U.S. Copyright
Office any and all documents necessary to perfect Obligor's fights therein. Upon
Obligor  creating,  writing,  producing  or  otherwise  acquiring  any  material
Software,  Obligor  shall give  prompt  notice  thereof to Bank.  Obligor  shall
execute  and  deliver to Bank any and all  copyright  mortgages,  UCC  financing
statements  and other  documents  and  instruments  which  Bank may  request  in
connection with the Bank perfecting its first priority security interest in such
Software.


RESEARCH ENGINEERS, INC., a Delaware corporation

By:
    -------------------------
    Jyoti Chatterjee, EVP/COO
    

By: -------------------------
    Wayne L. Blair, CFO/Secretary






<PAGE>


                                                                     Exhibit 2.7

                            DO NOT DESTROY THIS NOTE:
  
When paid,  this note, with the Deed of Trust securing same, must be surrendered
to the Trustee for cancellation before reconveyance will be made.

                                  IMPERIAL BANK
                          INNOVATIVE BUSINESS BANKING;
                                   Member FDIC

                         NOTE SECURED BY DEED OF TRUST

$2,320,000.00            Costa MesaCalifornia ,                February 26, 1999

On August  26,  2000 , and as  hereinafter  provided,  for value  received,  the
undersigned  promises to pay to IMPERIAL  BANK  ("Bank"),  a California  banking
corporation,  or order, at its Orange County Regional office,  the principal sum
of $  2,320,000.00  MAXIMUM or such sums up to the maximum if so stated,  as the
Bank may now or hereafter  advance to or for the benefit of the  undersigned  in
accordance  with  the  terms  hereof,   together  with  interest  from  date  of
disbursement or N/A , whichever is later, on the unpaid principal balance |_| at
the rate of % per year |X| at the rate of 3.000 % per year in excess of the rate
of  interest  which Bank has  announced  as its prime  lending  rate (the "Prime
Rate"),  which shall vary  concurrently with any change in such Prime Rate, or $
250.00 , whichever is greater.  Interest  shall be computed at the above rate on
the basis of the actual  number of days during  which the  principal  balance is
outstanding,  divided by 360, which shall, for interest computation purposes, be
considered one year.

Interest  shall be payable |X| monthly |_| quarterly |_| included with principal
|_| in addition to principal |_|  beginning  March 26, 1999 , and if not so paid
shall become a part of the principal. All payments shall be applied first to any
late charges owing,  then to interest and the  remainder,  if any, to principal.
|_| (If checked),  Principal  shall be payable in  installments  of $ , or more,
each installment on the day of each , beginning .

   Any  partial  prepayment  shall be applied to the  installments,  if any,  in
inverse order of maturity. Should default be made in the payment of principal or
interest when due, or in the  performance or observance,  when due, of any item,
covenant  or  condition  of any  deed of  trust,  security  agreement  or  other
agreement (including amendments or extensions thereof) securing or pertaining to
this note, at the option of the holder hereof and without notice or demand,  the
entire balance of principal and accrued interest then remaining unpaid shall (a)
become immediately due and payable, and (b) thereafter bear interest, until paid
in full, at the increased rate of 5% per year in excess of the rate provided for
above, as it may vary from time to time.

   Defaults shall include, but not be limited to, the failure of the maker(s) to
pay  principal  or interest  when due;  the filing as to each  person  obligated
hereon,  whether as maker,  co-maker,  endorser or  guarantor  (individually  or
collectively  referred  to as  the  "Obligor")  of a  voluntary  or  involuntary
petition under the provisions of the Federal Bankruptcy Act; the issuance of any
attachment  or  execution  against  any asset of any  Obligor;  the death of any
Obligor or any  deterioration  of the  financial  condition of any Obligor which
results in the holder hereof considering itself, in good faith, insecure.

   If any installment payment, interest payment,  principal payment or principal
balance payment due hereunder is delinquent ten or more days,  Obligor agrees to
pay Bank a late charge in the amount of 5% of the payment so due and unpaid,  in
addition to the payment; but nothing in this paragraph is to be construed as any
obligation  on the part of the  holder  of this note to  accept  payment  of any
payment past due or less than the total unpaid principal balance after maturity.

   If this note is not paid when due, each Obligor promises to pay all costs and
expenses of collection  and  reasonable  attorney's  fees incurred by the holder
hereof on account of such  collection,  plus interest at the rate  applicable to
principal,  whether or not suit is filed  hereon.  Each Obligor shall be jointly
and  severally  liable  hereon  and  consents  to  renewals,   replacements  and
extensions of time for payment hereof,  before, at, or after maturity;  consents
to the acceptance, release or substitution of security for this note; and waives
demand and  protest  and the right to assert any  statute  of  limitations.  Any
married  person who signs this note  agrees  that  recourse  may be had  against
separate  property for any obligations  hereunder.  The  indebtedness  evidenced
hereby  shall be payable in lawful  money of the  United  States.  In any action
brought under or arising out of this note, each Obligor,  including successor(s)
or  assign(s)  hereby  consents to the  application  of  California  law, to the
jurisdiction  of any  competent  court  within the State of  California,  and to
service of process by any means authorized by California law.

   This note is secured by a deed of trust, dated February 26, 1999, to IMPERIAL
BANCORP as Trustee which  contains the following  provisions:  "In the event the
herein described property or any part thereof,  or any interest therein is sold,
agreed to be sold, conveyed,  transferred,  disposed of, further encumbered,  or
alienated  by trustor  or by the  operation  of law or  otherwise,  without  the
written consent of beneficiary first obtained,  all obligations  secured by this
instrument,  irrespective of the maturity dates expressed therein, at the option
of the holder beneficiary, and without demand or notice shall immediately become
due and  payable.  Consent to one such  transaction  shall not be deemed to be a
waiver  of  the  right  to  require  such   consent  to  future  or   successive
transactions."

   No single or partial  exercise of any power  hereunder,  or under any deed of
trust,  security  agreement or other  agreement  in  connection  herewith  shall
preclude  other or further  exercises  thereof or the exercise of any other such
power.  The holder  hereof shall at all times have the right to proceed  against
any  portion of the  security  for this note in such order and in such manner as
such holder may consider appropriate, without waiving any rights with respect to
any of the  security.  Any delay or omission on the part of the holder hereof in
exercising any right hereunder,  or under any deed of trust,  security agreement
or other agreement, shall not operate as a waiver of such right, or of any other
right,  under  this  note or any  deed of  trust,  security  agreement  or other
agreement in connection herewith.

L 492 E (Rev 2/1999)                      Page 1



<PAGE>


REFERENCE PROVISION
   1. Other than (i)  non-judicial  foreclosure  and all  matters in  connection
therewith regarding security interests in real or personal property; or (ii) the
appointment of a receiver,  or the exercise of other  provisional  remedies (any
and all of which may be initiated pursuant to applicable law), each controversy,
dispute or claim between the parties arising out of or relating to this document
("Agreement"),  which  controversy,  dispute or claim is not  settled in writing
within  thirty (30) days after the "Claim Date"  (defined as the date on which a
party subject to the Agreement  gives written notice to all other parties that a
controversy, dispute or claim exists), will be settled by a reference proceeding
in California in  accordance  with the  provisions of Section 638 et seq. of the
California Code of Civil Procedure,  or their successor  section ("CCP"),  which
shall  constitute the exclusive  remedy for the  settlement of any  controversy,
dispute or claim concerning this Agreement,  including whether such controversy,
dispute or claim is subject to the reference  proceeding and except as set forth
above, the parties waive their rights to initiate any legal proceedings  against
each other in any court or  jurisdiction  other than the  Superior  Court in the
County where the Real Property, if any, is located or Los Angeles County if none
(the  "Court").  The referee shall be a retired  Judge of the Court  selected by
mutual agreement of the parties,  and if they cannot so agree within  forty-five
(45) days after the Claim Date,  the referee  shall be promptly  selected by the
Presiding  Judge of the  Court (or his  representative).  The  referee  shall be
appointed  to sit as a temporary  judge,  with all of the powers for a temporary
judge, as authorized by law, and upon selection should take and subscribe to the
oath of office as provided for in Rule 244 of the California  Rules of Court (or
any subsequently  enacted Rule). Each party shall have one peremptory  challenge
pursuant to CCPss.170.6. The referee shall (a)be requested to set the matter for
hearing  within  sixty  (60) days  after the Claim  Date and (b) try any and all
issues of law or fact and report a statement of decision upon them, if possible,
within ninety (90) days of the Claim Date. Any decision  rendered by the referee
will be final,  binding and conclusive and judgment shall be entered pursuant to
CCP  ss.644 in any court in the State of  California  having  jurisdiction.  Any
party may apply for a reference  proceeding  at any time after  thirty (30) days
following notice to any other party of the nature of the controversy, dispute or
claim, by filing a petition for a hearing and/or trial. All discovery  permitted
by this Agreement  shall be completed no later than fifteen (15) days before the
first  hearing  date  established  by the  referee.  The referee may extend such
period in the event of a party's refusal to provide requested  discovery for any
reason whatsoever,  including,  without  limitation,  legal objections raised to
such  discovery  or  unavailability  of a witness due to absence or illness.  No
party shall be entitled to "priority" in conducting  discovery.  Depositions may
be taken by either  party upon seven (7) days  written  notice,  and request for
production or inspection of documents shall be responded to within ten (10) days
after service.  All disputes  relating to discovery  which cannot be resolved by
the parties shall be submitted to the referee whose  decision shall be final and
binding upon the parties. Pending appointment of the referee as provided herein,
the Superior Court is empowered to issue temporary and/or provisional  remedies,
as appropriate.

   2.  Except  as  expressly  set forth in this  Agreement,  the  referee  shall
determine  the manner in which the reference  proceeding is conducted  including
the time and place of all hearings,  the order of presentation of evidence,  and
all other  questions  that  arise with  respect  to the course of the  reference
proceeding.  All proceedings and hearings  conducted before the referee,  except
for trial,  shall be conducted  without a court  reporter,  except that when any
party so requests, a court reporter will be used at any hearing conducted before
the  referee.  The party  making  such a request  shall have the  obligation  to
arrange for and pay for the court  reporter.  The costs of the court reporter at
the trial shall be borne equally by the parties.

3. The referee  shall be required to  determine  all issues in  accordance  with
existing case law and the statutory laws of the State of  California.  The rules
of evidence  applicable to proceedings at law in the State of California will be
applicable to the reference proceeding.  The referee shall be empowered to enter
equitable as well as legal relief,  to provide all temporary and/or  provisional
remedies  and to enter  equitable  orders that will be binding upon the parties.
The  referee  shall  issue a  single  judgment  at the  close  of the  reference
proceeding  which shall dispose of all of the claims of the parties that are the
subject of the  reference.  The parties  hereto  expressly  reserve the right to
contest or appeal from the final judgment or any appealable  order or appealable
judgment entered by the referee.  The parties hereto expressly reserve the right
to findings of fact,  conclusions of law, a written  statement of decision,  and
the right to move for a new trial or a different  judgment,  which new trial, if
granted, is also to be a reference proceeding under this provision.

   4. In the event that the enabling  legislation which provides for appointment
of a referee is repealed  (and no  successor  statute is  enacted),  any dispute
between  the  parties  that  would  otherwise  be  determined  by the  reference
procedure herein  described will be resolved and determined by arbitration.  The
arbitration  will be conducted by a retired  judge of the Court,  in  accordance
with the California  Arbitration  Act,  ss.1280 through  ss.1294.2 of the CCP as
amended  from time to time.  The  limitations  with  respect to discovery as set
forth hereinabove shall apply to any such arbitration proceeding.

This Note is subject to the  provisions of the Credit  Agreement  dated February
26, 1999 and all amendments thereto and replacements therefor.



                                    RESEARCH ENGINEERS, INC., A DELAWARE
                                    CORPORATION


                                    By:  /S/ JYOTI CHATTERJEE
                                         --------------------
                                         Jyoti Chatterjee, EVP/COO

                                    By:  /S/ WAYNE BLAIR
                                         --------------------
                                         Wayne L. Blair,
                                         CFO/Secretary


L 492 E (Rev 2/1999)                      Page 2



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