INTEGRATED SYSTEMS INC
8-K, 1995-11-15
PREPACKAGED SOFTWARE
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                             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):  October 31, 1995


                            INTEGRATED SYSTEMS, INC.
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)


                                   California
                 ---------------------------------------------
                 (State or other jurisdiction of incorporation)


         0-18268                                      94-2658153
       -----------                                   -------------
       (Commission                                   (IRS Employer
       File Number)                               Identification No.)


              3260 Jay Street, Santa Clara, California 95054-3309
              ---------------------------------------------------
              (Address of principal executive offices) (Zip code)


                                 (408) 980-1500
              ---------------------------------------------------
              (Registrant's telephone number, including area code)


                                 Not Applicable
          ------------------------------------------------------------
          (Former name or former address, if changed since last report)


This report on Form 8-K consists of 34 sequentially  numbered pages. The exhibit
index is located at sequentially numbered page 4.


<PAGE>


ITEM 2:  ACQUISITION OR DISPOSITION OF ASSETS.

         On October 31, 1995, Integrated Systems, Inc., a California corporation
("Registrant" or "ISI"), acquired control of TakeFive Software GmbH, an Austrian
corporation  ("TakeFive"),  through an exchange of 97% of the share interests in
TakeFive  (which  are the  equivalent  of  Common  Stock)  for  Common  Stock of
Registrant  (the  "Exchange").  The Exchange  was  effected  pursuant to a Stock
Exchange  Agreement  (the  "Agreement"),  dated as of October 31,  1995,  by and
between Registrant, TakeFive and the holders of the share interests of TakeFive.
The Exchange was accounted for as a pooling of interests. Prior to the Exchange,
TakeFive was in the business of developing,  marketing and  supporting  software
tools used in software  development.  ISI intends to  continue  the  business of
TakeFive after the Exchange.  Pursuant to the terms of the Agreement, 97% of the
share interests of TakeFive outstanding  immediately prior to the effective time
of the Exchange were exchanged for 435,990 shares of Registrant's  Common Stock.
The number of shares  exchanged for the TakeFive share  interests was determined
by dividing (a) $15 million less certain adjustments by (b) the lesser of $33 or
the  average of the closing  price of  Registrant's  Common  Stock on the Nasdaq
Stock  Market for the ten day period  ending one day prior to the closing  date.
This formula was arrived at through negotiation.

         Contemporaneously  with the Exchange,  Christian  Kleinferchner,  Peter
Bucsi and Sandor  Korosi,  each a TakeFive  employee,  entered  into  employment
agreements with Registrant  providing for, among other things,  certain terms of
employment at a specified  minimum salary,  and  noncompetition  agreements.  In
addition,  the other holders of share  interests in TakeFive who exchanged  such
share interests in the Exchange each entered into noncompetition agreements.

ITEM 7:  FINANCIAL STATEMENTS AND EXHIBITS.

(a)      Financial Statements of Businesses Acquired.

         No financial statements of TakeFive Software GmbH are required pursuant
         to Rule 3-05 of Regulation S-X.

(b)      Pro Forma Financial Information.

         No pro forma financial  information is required  pursuant to Article II
         of Regulation S-X.

         (c)      Exhibits.

         The following exhibits are filed herewith:

2.01     Stock  Exchange  Agreement  dated as of October 31, 1995 by and between
         Integrated  Systems,  Inc.,  TakeFive  Software GmbH and the holders of
         share interests in TakeFive Software GmbH.

                                      -2-

<PAGE>


                                    SIGNATURE


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

                                       INTEGRATED SYSTEMS, INC.



Date:  November 13, 1995               By:
                                           -------------------------------------
                                                  Steven Sipowicz
                                                  Chief Financial Officer

                                      -3-
<PAGE>



                                INDEX TO EXHIBITS




Exhibit                                                           Sequentially
Number              Description of Exhibit                        Numbered Page
- -------             ----------------------                        -------------
2.01     Stock Exchange Agreement dated as of October 31,               5
         1995 by and between Integrated Systems, Inc.,
         TakeFive Software GmbH and the holders of share
         interests in TakeFive Software GmbH. (The Stock
         Exchange Agreement contains a list identifying the
         contents of all omitted exhibits.  Registrant agrees
         to furnish supplementally a copy of any omitted
         exhibit to the Commission upon request).

                                      -4-




                                                                    EXHIBIT 2.01


                            STOCK EXCHANGE AGREEMENT


         This Stock Exchange  Agreement (this "AGREEMENT") is made as of October
31, 1995,  by and between  Integrated  Systems,  Inc., a California  corporation
("ISI"),  takeFive Software Gesellschaft m.b.H., an Austrian Corporation ("T5"),
and each of the persons holding or being a Trust Beneficiary of a share interest
in T5 as listed on Exhibit A (the "SHAREHOLDERS").

                                    RECITALS

         WHEREAS,  the board of directors of ISI, T5 and the managing  directors
and  Shareholders of T5 deem it advisable and in the best interests of each such
corporation and its shareholders for ISI or ISI's Austrian subsidiary to acquire
and each of the Shareholders to exchange all of their share interests in T5 (the
"T5  Shares")  on the  terms and  subject  to the  conditions  set forth in this
Agreement and in accordance  with the General  Corporation Law of California for
common stock in ISI (the "ISI COMMON STOCK"); and

         WHEREAS,  ISI and each Shareholder desire to enter into an agreement to
ensure that the  Shareholders do not compete directly or indirectly with ISI and
its Subsidiaries  (including T5) or solicit any of their respective employees or
customers;

         NOW,  THEREFORE,  in consideration of the mutual  agreements  contained
herein and other good and valuable  consideration,  the parties  hereto agree as
follows:


                                    ARTICLE I

         1.1 CERTAIN DEFINED TERMS.  As used in this  Agreement,  in addition to
the terms defined  elsewhere in the Agreement  (including in the Recitals),  the
following  terms will have the following  meanings  (such meanings to be equally
applicable to both the singular and plural forms of the terms defined):

                  "CONTRACTUAL   OBLIGATION"   means,  as  to  any  Person,  any
provision  of any  note,  bond  or  security  issued  by such  Person  or of any
mortgage,  indenture,  deed  of  trust,  lease,  license,  franchise,  contract,
agreement, instrument or undertaking to which such Person is a party or to which
it or any of its property or assets is subject.

                  "EXCHANGE ACT" means the  Securities  Exchange Act of 1934, as
amended from time to time, and the rules and  regulations of the SEC promulgated
from time to time thereunder.

                  "FAIRNESS   HEARING"  means  a  fairness  hearing  before  the
California  Commissioner  of  Corporations  pursuant  to  Section  25142  of the
Securities Law.

                  "GAAP" means generally accepted  accounting  principles in the
United States of America.

                                      -5-

<PAGE>



                  "GOVERNMENTAL  AUTHORITY" means any nation or government,  any
state  or  other  political   subdivision  thereof  and  any  entity  exercising
executive,  legislative,  judicial, regulatory or administrative functions of or
pertaining to government.

                  "ISI AUSTRIAN  SUBSIDIARY"  means the Subsidiary  formed under
the laws of Austria which is either directly or indirectly wholly-owned by ISI.

                  "LIEN" means any mortgage, pledge, hypothecation,  assignment,
encumbrance,  lien (statutory or other) or other security  agreement of any kind
or nature whatsoever  (including,  without  limitation,  any conditional sale or
other title retention agreement or any financing lease having  substantially the
same economic effect as any of the foregoing).

                  "MATERIAL ADVERSE EFFECT" (a) as used with respect to T5 means
a  material  adverse  effect on the  following:  (i) the  business,  operations,
property or condition  (financial or other) of T5 as a whole or (ii) the ability
of T5 to  consummate  the  transactions  contemplated  by this  Agreement or the
Related  Agreements or perform its obligations  hereunder or thereunder or (iii)
the ability of ISI to exercise  its rights  under this  Agreement or the Related
Agreements or as a shareholder of T5 and (b) as used with respect to ISI means a
material adverse effect on the following: (i) the business, operations, property
or condition (financial or other) of ISI taken as a whole or (ii) the ability of
ISI to consummate the transactions contemplated by this Agreement or the Related
Agreements  or perform  their  obligations  hereunder or thereunder or (iii) the
ability  of T5 to  exercise  its  rights  under this  Agreement  or the  Related
Agreements.

                  "PERMIT"  means a permit  issued  pursuant to Section 25110 of
the Securities Law after the Fairness Hearing.

                  "PERMIT  APPLICATION"  means the application for qualification
of the ISI Common Stock to be issued in the  Transaction and application for the
Fairness Hearing,  together with any other documents  required by the Securities
Law in connection with the Exchange.

                  "PERSON"  means  an  individual,   partnership,   corporation,
business trust, joint stock company, trust,  unincorporated  association,  joint
venture,  limited liability company,  Governmental  Authority or other entity of
whatever nature.

                  "RELATED AGREEMENTS" means collectively each agreement entered
into  by  ISI  and T5 in  connection  with  this  Agreement,  including  without
limitation  the  Employment   Agreements,   NonCompetition  and  NonSolicitation
Agreement, and Affiliate Agreements.

                  "REQUIREMENT(S)   OF  LAW"  means,  as  to  any  Person,   the
Certificate of Incorporation  and By-Laws or other  organizational  or governing
documents  of  such  Person,  and  any  law,  treaty,   rule  or  regulation  or
determination of an arbitrator or a court or other  Governmental  Authority,  in
each case applicable to or binding upon such Person or any of its property or to
which such Person or any of its property is subject.

                  "SEC" means the Securities and Exchange Commission.

                  "SEC  DOCUMENTS"  means each  statement or report filed by the
Company  under  the  Exchange  Act,  each  registration   statement   (including
amendments  thereto),  and  any  other  document  filed  by T5  or  any  of  its
Subsidiaries  with the SEC pursuant to the  Securities  Act or the Exchange Act,
including all schedules and Company-prepared exhibits thereto.

                                      -6-

<PAGE>



                  "SECURITIES  ACT" means the Securities Act of 1933, as amended
from time to time,  and the rules and  regulations of the SEC  promulgated  from
time to time thereunder.

                  "SECURITIES LAW" means the California Corporate Securities Law
of 1968, as amended.

                  "SHAREHOLDERS'  EXPENSES"  means: (i) all broker fees incurred
by the  Shareholders as a result of the Transaction  regardless of whether T5 or
the  Shareholders  are directly  obligated by contract to pay such fees and (ii)
0.625%  (one-half  of 1.25%) of the GmbH stock  transfer  tax and fifty  percent
(50%) of the notarial fees. Provided however, ISI or the ISI Austrian Subsidiary
shall be responsible for any additional transfer tax incurred as a result of ISI
electing to have the ISI Austrian Subsidiary acquire the T5 Shares.

                  "SUBSIDIARY"  means, as to any Person,  a corporation of which
shares of stock having ordinary voting power (other than stock having such power
only by reason of the  happening  of a  contingency)  to elect a majority of the
board of directors or other managers of such  corporation are at the time owned,
or the  management  of which is  otherwise  controlled,  directly or  indirectly
through one or more intermediaries, or both, by such Person.

                  "T5  AFFILIATES"  will  mean  the  Shareholders  and  managing
directors of T5.

                  "TAX" OR  "TAXES"  mean,  with  respect to any  Person,  a net
income,  gross  income,  gross  receipts,  sales,  use, ad  valorem,  franchise,
profits, license,  withholding,  payroll, employment,  excise, severance, stamp,
transfer,  occupation,  premium, property or windfall profit tax, custom duty or
other  tax,  governmental  fee or other  like  assessment  or charge of any kind
whatsoever,  together  with any  interest  and any  penalty,  addition to tax or
additional  amount  imposed  by  any  jurisdiction  or  other  taxing  authority
(federal, state, local or foreign) on such Person.

         1.2 OTHER DEFINITIONS. The capitalized terms used in this Agreement and
not defined in Section 1.1 are defined elsewhere in this Agreement.


                                   ARTICLE II

                               EXCHANGE OF SHARES

         2.1 EXCHANGE OF T5 SHARES.  Subject to the terms and conditions of this
Agreement, all of the issued and outstanding shares of T5 Shares shall be deemed
to be transferred by the Shareholders,  at the Closing, for shares of ISI Common
Stock ("TOTAL  NUMBER OF SHARES OF ISI COMMON  STOCK") as determined by dividing
the sum of  fifteen  million  dollars  ($15,000,000.00)  less the  Shareholders'
Expenses by the lower of (i)  thirty-three  dollars ($33.00) or (ii) the average
of the ISI closing  price on the ten (10)  business days ending one day prior to
the Closing Date (as reported on the Wall Street  Journal) (the  "TRANSACTION").
The  "EXCHANGE  RATIO"  for the T5 Shares  is the Total  Number of Shares of ISI
Common Stock divided by 500,000.  ISI shall issue to each Shareholder the number
of shares of ISI Common Stock determined by multiplying the percentage set forth
opposite of such  Shareholder's  name on Exhibit A by the Total Number of Shares
of ISI Common Stock.

                                      -7-

<PAGE>



         2.2 FRACTIONAL  SHARES.  No fractional shares of ISI Common Stock shall
be issued and such  fractional  interests shall not entitle the owner thereof to
vote.  In lieu of any  fractional  share,  each  holder of T5  Shares  who would
otherwise  be entitled to receive a fraction of a share of ISI Common Stock will
be entitled to receive from ISI an amount of cash,  without  interest,  equal to
the ISI Average Closing Price  multiplied by the fraction of share of ISI Common
Stock to which such holder would otherwise be entitled.

         2.3  ADJUSTMENTS FOR CAPITAL  CHANGES.  If on or after the date of this
Agreement,  but on or prior to Closing, ISI recapitalizes through a stock split,
reverse  stock split,  or  reorganizes,  reclassifies  or otherwise  changes its
outstanding  shares  into the same or a  different  number  of  shares  of other
classes,  or declares a dividend on its outstanding  shares payable in shares or
securities  convertible  into  shares,  the Total Number of Shares of ISI Common
Stock to be  exchanged  for T5 Shares  will be adjusted  appropriately  so as to
maintain the proportionate interests of the Shareholders.

         2.4 CLOSING.  The closing of the Transaction  (the "CLOSING") will take
place on October 31, 1995 after  satisfaction or waiver of all of the conditions
set forth in  Article  VII that by their  terms are not to occur at the  Closing
(the "CLOSING  DATE"),  at the offices of Fenwick & West,  Two Palo Alto Square,
Palo Alto,  California,  unless another date or place is agreed to in writing by
the parties hereto.

         2.5 EFFECTS OF THE  TRANSACTION.  Subsequent  to the Closing,  at ISI's
option,  T5  shall  be a  wholly  owned  Subsidiary  of ISI or the ISI  Austrian
Subsidiary.

         2.6 ACCOUNTING  TREATMENT.  The business  combination to be effected by
the Transaction is intended to be treated for accounting  purposes as a "pooling
of interests." The Affiliates of T5 and ISI shall execute and deliver Affiliates
Agreements, respectively.

         2.7      FAIRNESS HEARING.

                  (a) The ISI Common Stock to be issued in the Transaction shall
be qualified by the Permit after the Fairness  Hearing and the issuance  thereof
shall thereby be an exempt  transaction under Section 3(a)(10) of the Securities
Act. As  promptly as  practicable  after the date of this  Agreement,  ISI shall
prepare  and file with the  California  Department  of  Corporations  the Permit
Application.  ISI shall  also take any  action  required  to be taken  under any
applicable  state  securities or "blue sky" laws in connection with the issuance
of the ISI Common Stock in the Transaction.  The  Shareholders  shall furnish to
ISI all  information  concerning  T5 and the  Shareholders  as may be reasonably
requested in connection  with any action  contemplated  by this Section 2.7. The
parties shall use their best efforts to take any actions required to be taken to
complete the Fairness Hearing and obtain the issuance of the Permit.

                  (b) Notwithstanding  the foregoing,  ISI reserves the right to
qualify the issuance of ISI Common Stock under a different  SEC exemption in the
event a Fairness Hearing  exemption is  impracticable  or unavailable,  provided
that the  Shareholders  have  substantially  the same liquidity as the liquidity
obtained  from a Fairness  Hearing.  The parties shall use their best efforts to
take any actions required to qualify under such alternative exemption.


                                      -8-

<PAGE>




                                   ARTICLE III

                            EXCHANGE OF CERTIFICATES

         3.1 EXCHANGE.  At the Closing, at ISI's option, ISI will, or will cause
its ISI Austrian  Subsidiary to, deliver to each Shareholder a share certificate
registered  in the name of such  Shareholder  for the  number  of  shares of ISI
Common Stock that such  Shareholder  is entitled to receive  pursuant to Section
2.1, as adjusted if applicable pursuant to Section 2.3.

         3.2 NO  FURTHER  OWNERSHIP  RIGHTS IN T5 SHARES.  All ISI Common  Stock
delivered in exchange for T5 Shares in accordance with the terms hereof shall be
deemed to have been delivered in full  satisfaction of all rights  pertaining to
such shares of T5 Shares.


                                   ARTICLE IV
                         REPRESENTATIONS AND WARRANTIES
                           OF THE SHAREHOLDERS AND T5

         Subject to the  exceptions  set forth in the letter  delivered by T5 to
ISI concurrently  herewith (the "EXCEPTIONS  LETTER") attached hereto as Exhibit
B, T5 and the  Shareholders  represent and warrant to ISI, as of the date hereof
and as of the Closing Date, that:

         4.1 DUE  ORGANIZATION.  T5 is (i) duly  organized and validly  existing
under the laws of Austria as  registered  under  FN36.149K  LG Salzburg and (ii)
duly  qualified  as a foreign  corporation  under the laws of each  jurisdiction
where its  ownership,  lease or  operation  of  property  or the  conduct of its
business requires such  qualification,  except to the extent that the failure to
qualify as a foreign corporation would not, in the aggregate with all such other
failures,  have a  Material  Adverse  Effect.  T5 has the  corporate  power  and
authority  and the legal  right to own and operate  its  property,  to lease the
property  it  operates  as  lessee  and to  conduct  its  business  as now being
conducted and as proposed to be  conducted,  except to the extent the failure to
have such power,  authority or legal right would not, in the aggregate  with all
such other failures, have a Material Adverse Effect.

         4.2  CORPORATE  POWER.  Complete  and  correct  copies of the  Austrian
Registry  Excerpt,  the Articles of Association  and Bylaws (or similar  charter
documents),  all attached  hereto as Exhibit C, of T5, as amended to date,  have
been  delivered to ISI. T5 is not in default in the  performance,  observance or
fulfillment  of any  provision  of its  Articles  of  Association  or Bylaws (or
similar charter documents).

         4.3 GOOD TITLE. Upon delivery to ISI (or at ISI's direction, to the ISI
Austrian Subsidiary) of the notarial deed, duly executed by the Shareholders and
ISI (or the ISI Austrian Subsidiary, as applicable) in substantially the form of
a draft of which is  attached  hereto as Exhibit D, at the Closing the T5 Shares
will be duly and validly authorized and issued, fully paid and nonassessable and
ISI (or if applicable,  the ISI Austrian Subsidiary) will be the owner of the T5
Shares free and clear of any adverse encumbrances or claims.

         4.4 CAPITALIZATION.  T5 is an Austrian  Gesellschaft m.b.H., which is a
limited liability company.  Shareholders own shares in T5 which are not embodied
in  share  certificates  but  such  holdings  are  registered  in  the  Austrian
commercial  registry.  The T5 Shares may be  transferred  by notarial  deed. The
authorized  share  capital  of T5 as of the  date  hereof  consists  only of ATS
500,000  shares.  No person or entity owns or has rights to the T5 Shares or any
other

                                      -9-
<PAGE>

security of T5 except for the  Shareholders.  All T5 Shares are duly  authorized
and fully paid and the terms of the T5 Shares are as set forth in T5's  Articles
of  Association,  a copy of  which  has  been  delivered  to ISI.  There  are no
outstanding options,  warrants, calls, rights,  commitments or agreements of any
kind to which T5 is a party or by  which  it is bound  obligating  it to  issue,
deliver or sell, or cause to be issued,  delivered or sold, additional shares of
the  capital  stock of any  class of, or other  equity  interests  in, T5 or any
securities  convertible or exchangeable into or evidencing the right to purchase
any shares of capital stock of any class of, or other equity interests in, T5 or
obligating  T5 to grant,  extend or enter into any such option,  warrant,  call,
right, commitment or agreement.

         4.5 NO CONFLICT.  Except as set forth in Section 4.5 of the  Exceptions
Letter,  neither the execution,  delivery or performance by the Shareholders and
T5 of this  Agreement  or any  Related  Agreement  nor the  consummation  of the
transactions  contemplated hereby and thereby and compliance by the Shareholders
and T5 with any of the  provisions  hereof  and  thereof  will (a)  require  any
consent, approval or notice under, violate, conflict with, or result in a breach
of any provisions of, or constitute a default (or an event which, with notice or
lapse of time or both,  would  constitute  a  default)  under,  or result in the
termination of, or accelerate the performance  required by, or result in a right
of termination or  acceleration,  or result in the creation of any Lien upon any
of the  properties  or assets  of T5  under,  any of the  terms,  conditions  or
provisions  of (i) the  Articles of  Association  or Bylaws of T5; (ii) any Bank
Document (as defined in Section 4.16) or (iii) any Contractual Obligation of T5,
except with respect to any or all of (i), (ii) or (iii) (other than with respect
to any Bank  Document or the loan  documents and the  transactions  contemplated
thereby) (A) to the extent the failure to obtain any such consent or approval or
to give any such notice would not have a Material  Adverse  Effect,  and (B) for
such  violations,  conflicts,  breaches  or  defaults  which  would not,  in the
aggregate  with all other such  failures,  violations,  conflicts,  breaches and
defaults,  terminations,  accelerations  and creations of liens, have a Material
Adverse  Effect  or  (b)  assuming  compliance  with  the  Requirements  of  Law
applicable  to  ISI,  violate  any  Requirement  of Law  applicable  to T5,  the
violation of which would, in the aggregate with all other such violations,  have
a Material Adverse Effect.  Without  limiting the foregoing,  Section 4.5 of the
Exceptions  Letter sets forth a complete  description,  including  the financial
consequences  to T5, of any rights,  benefits or payments  which may arise or be
accelerated with respect to employees,  directors, officers or consultants of T5
or with  respect  to any other  Person as a result  of the  consummation  of the
transactions contemplated hereby.

         4.6  GOVERNMENTAL  CONSENTS.  Except as specifically  set forth in this
Agreement,  no consent,  approval,  order or authorization  of, or registration,
declaration  or filing  with,  any  Governmental  Authority  is  required  to be
obtained or made by the Shareholders and T5 in connection with the execution and
delivery of the Agreement and the Related  Agreements or the consummation of the
transactions contemplated hereby by the Shareholders and T5, except for (a) such
consents,  approvals, orders,  authorizations,  registrations,  declarations and
filings as may be required under applicable  securities laws and Austrian merger
control  laws and (b) such  other  consents,  orders,  authorizations,  filings,
approvals  and  registrations  which if not  obtained  or made  would not in the
aggregate have a Material Adverse Effect.

         4.7 FINANCIAL STATEMENTS. T5 and the Shareholders have delivered to ISI
true and complete copies of (i) the audited  unconsolidated balance sheets of T5
(a) at  December  31,  1994,  and (b) the  subsequent  eight (8)  months  ending
thereafter on August 31, 1995 (the "LATEST BALANCE SHEET"), accompanied by notes
and  the  certificate  of  Deloitte  &  Touche,   independent  certified  public
accountants.  The  foregoing  financial  statements  and notes are  collectively
referred to herein as the "FINANCIAL  STATEMENTS".  Other than liabilities which
have arisen since the date of the Latest Balance Sheet in the ordinary course of
the business of T5 (none of which relates to a material  liability for breach of
contract, breach of warranty, infringement of proprietary rights,

                                      -10-
<PAGE>

lawsuits  or  similar  claims),  T5 does  not have any  material  obligation  or
liability (whether accrued,  contingent,  unliquidated or otherwise,  whether or
not known to T5,  whether  due or to become due) which is not  reflected  on the
Latest Balance Sheet.  T5 and the  Shareholders  do not know of the assertion of
any material  liability  against T5, viewed as a whole,  of any nature not fully
reflected  or  reserved  against  in the  Latest  Balance  Sheet or in the notes
thereto.  T5 is  not  a  guarantor,  indemnitor  or  otherwise  liable  for  any
indebtedness or other obligations of any other Person, firm or corporation.  The
Financial  Statements:  (a) are in accordance  with the books and records of T5;
(b) fairly  present  the  results of the  financial  period of T5 at its date of
reference,  and the general  financial  condition of T5 at the respective  dates
therein  indicated  and the results of  operations  for the  respective  periods
therein specified; and (c) in the case of the audited Financial Statements only,
have been  prepared in  accordance  with the Austrian  Accounting  Act (RLG) and
Austrian generally accepted accounting  principles (GOB) applied on a consistent
basis.

         4.8   ABSENCE  OF  CERTAIN   CHANGES.   Except  for  the   transactions
contemplated  hereby and  except as set forth in the  Exceptions  Letter,  since
August 31, 1995 (except where a later date is indicated below), T5 has conducted
its business only in the ordinary and usual course and there has not been:

                  (a) any change in the financial condition, properties, assets,
liabilities  or operations of T5 which change by itself or in  conjunction  with
all other  such  changes,  whether  or not  arising  in the  ordinary  course of
business,  has had or can  reasonably  be  expected  to have a Material  Adverse
Effect on T5;

                  (b) any  development,  event or  condition or  combination  of
developments,   events  or  conditions  relating  to  T5  of  which  T5  or  the
Shareholders have knowledge which may result in a Material Adverse Effect;

                  (c) any  damage,  destruction  or  loss,  whether  covered  by
insurance or not,  materially and adversely affecting the properties or business
of T5 taken as a whole;

                  (d) any declaration,  setting aside or payment of any dividend
in respect of the share interests of T5 or any redemption or acquisition of such
share interests by T5 or other distribution of the assets of T5;

                  (e)  any  labor  organization  activity,  termination  of  key
employees or other material disputes involving employees of T5;

                  (f) any change of accounting principles,  practices or methods
of T5;

                  (g) other than  sales or other  dispositions  in the  ordinary
course of business,  any sale,  mortgage,  pledge,  subjection  to Lien or other
disposition  of assets of T5 which,  individually  or in any  series of  related
transactions, have a value in excess of fifty thousand dollars ($50,000);

                  (h) any  amendment or  termination  of a material  contract or
agreement to which T5 is a party, the effect of which is adverse to T5, taken as
a whole;

                  (i)      any issuance of securities of T5;

                  (j) any increase in the compensation or severance arrangements
payable or to become  payable by T5 to any of their  directors,  officers or key
employees  other than  increases in the ordinary  course of business  consistent
with prior practice;

                                      -11-

<PAGE>



                  (k) any  adoption  of, or  increase  in, any bonus,  incentive
compensation, share option plan and any adoption of, or increase in any pension,
profit  sharing,  or  retirement,  insurance,  medical  reimbursement  or  other
employee benefit plan, any employment agreement or severance  arrangement or any
payment or arrangement made to, for or with any officers or key employees of T5,
other than increases  made in the ordinary  course of business  consistent  with
prior practice; or

                  (l) except as specifically contemplated by this Agreement, any
agreement by T5 to take any action described in this Section 4.8.

         4.9  NO  SUBSIDIARIES.  Except  as  set  forth  in  Section  4.9 of the
Exceptions  Letter,  T5 does not have any  Subsidiaries or any equity  interest,
direct or indirect,  in any  corporation,  partnership,  joint  venture or other
business entity.

         4.10 LEGAL  PROCEEDINGS.  T5 warrants that: (a) there is no pending or,
to the best of T5's and the Shareholders'  knowledge,  threatened claim, action,
lawsuit,  administrative proceeding,  arbitration, labor dispute or governmental
investigation  ("LITIGATION")  to which  T5 is a party  or by which  any of T5's
material  assets may be bound,  which,  if  adversely  determined,  could have a
Material Adverse Effect,  and (b) to T5's and the  Shareholders'  knowledge,  no
facts  exist  that  give  rise to a valid  claim  against  T5 for  breach  of an
obligation,  or for violation of applicable law, rule or regulation,  where such
claim could have a Material  Adverse Effect.  T5 is not subject to any judgment,
order,  writ,  injunction or decree of any court,  arbitrator or other competent
governmental or regulatory authority. T5 has not been permanently or temporarily
enjoined  by any  order,  judgment  or decree  of any  court or other  competent
governmental or regulatory  authority from engaging in or continuing any conduct
or practice in connection with its business, nor requiring T5 to take any action
of any kind with respect to its business.

         4.11 CONDUCT OF BUSINESS IN COMPLIANCE WITH REGULATORY REQUIREMENTS. T5
has, to T5's and the Shareholders' knowledge,  complied with each Requirement of
Law  promulgated  by any  Governmental  Authority  applicable to the  operation,
conduct or  ownership  of the  property or business  of T5  (including,  without
limitation, those relating to the offering and sale of securities,  occupational
safety and health, equal employment  practices,  antitrust,  consumer protection
and employee  benefits and  pensions),  except where such failure to comply with
any such  Requirement  of Law would not  reasonably  be expected to have, in the
aggregate with all such failures, a Material Adverse Effect.

         4.12  PROPERTIES;  LIENS AND  ENCUMBRANCES.  T5 has no real  properties
(except for leasehold interests, in which event the entity directly holding such
interest has a valid leasehold  interest) and has marketable  title to its other
properties and assets  material to the business of T5 taken as a whole,  subject
only to (a)  statutory  Liens  arising or  incurred  in the  ordinary  course of
business with respect to which the underlying  obligations are not delinquent or
the  validity  of  which  is  being  contested  in  good  faith  by  appropriate
proceedings,  (b) Liens for Taxes not yet delinquent or the validity of which is
being  contested in good faith by appropriate  proceedings,  (c) Liens to secure
any  indebtedness  reflected on the  Company's  August 31, 1995 audited  balance
sheet,  (d) property or assets acquired  subject to Liens since August 31, 1995,
(e) Liens and  defects in title that are not in the  aggregate  material  to the
business,  operations  or condition  (financial or other) of T5 taken as a whole
and (f) Liens reflected in the Exceptions Letter. The tangible personal property
owned,  leased or rented by T5 and the  intangible  personal  property  owned or
licensed by T5 constitute all of the property now used in, and necessary for the
conduct  of,  the  business  of T5 in the  manner  and to the  extent  presently
conducted.  All of the fixed assets and properties  listed on the Latest Balance
Sheet,  or thereafter  acquired or currently  used by T5, are in good  operating
condition in all material respects and are free from any material defect.

                                      -12-

<PAGE>

         4.13  INSURANCE.  T5 has maintained in full force and effect,  with all
premiums due thereon paid,  such policies of insurance and bonds in such amounts
and against  such risks and losses  which are  disclosed  in Section 4.13 of the
Exception  Letter,  as are  generally  maintained  with  respect  to  comparable
businesses and properties. Except as set forth in Section 4.13 of the Exceptions
Letter,  T5 does not pay for or own any "key man"  insurance  on the life of any
employee.  Set  forth in  Section  4.13 of the  Exceptions  Letter is a true and
complete  list of all  insurance  policies  carried by T5 at any time during the
past twelve (12) months with respect to the business,  assets and  operations of
T5,  together  with,  in respect of each policy,  the name of the  insurer,  the
number of the policy, the annual policy premium payable therefor,  the limits of
coverage,  the deductible amounts, if any, the expiration date, and each pending
claim  thereunder,  if any.  Complete and correct  copies of each current policy
have been  delivered  to ISI,  and each  policy  shown as current is on the date
hereof in full force and effect.

         4.14     U.S. GOVERNMENT CONTRACTS; EXPORT REGULATION.

                  (a) T5 does not have  access  to any  classified  information,
data or  technology  under any  contract  with the U.S.  government,  including,
without limitation, the military services; and,

                  (b) To the  knowledge of T5 and the  Shareholders,  T5 has not
conducted its business in violation of either the Export  Administration  Act of
1979,  as  amended,  or the  Export  Administration  Amendment  Act of 1981,  as
amended.

         4.15     INTELLECTUAL PROPERTY.

                  (a) Set forth in Section  4.15 of the  Exceptions  Letter is a
true and correct list of the following  properties  (hereinafter  referred to as
"INTELLECTUAL  PROPERTY  RIGHTS"):  (i) all United  States and  foreign  patents
including any extensions, registrations, confirmations, reexaminations, reissues
or renewals thereof, and patent applications, and any divisions,  continuations,
in whole or in part, therefor, of T5 ("Patents"); (ii) all registered trademarks
and service marks, and all pending applications therefore, of T5 ("TRADEMARKS");
(iii) all United  States and foreign  copyrights  (the  "COPYRIGHTS");  (iv) all
confidential information related to T5's business or its products or embodied in
any of its products ("TRADE SECRETS");  and (v) all permits,  grants,  licenses,
sublicenses, options, rights of first and subsequent refusal, outstanding offers
which, if accepted, would create a legal binding obligation of T5, and any other
rights, all relating to Patents,  Trademarks,  Copyrights,  or Trade Secrets and
running from T5 to a Person, or from a third party to T5 ("LICENSE RIGHTS").

                  (b) Section  4.15 of the  Exceptions  Letter sets forth all of
the  Intellectual  Property Rights material to the conduct of the business of T5
as now  conducted or proposed to be  conducted.  Section 4.15 of the  Exceptions
Letter  lists for each  identified  Intellectual  Property  Right the  following
information:  (i) the  nature of such  Intellectual  Property  Right;  (ii) T5's
ownership interest in such Intellectual  Property Rights; (iii) the jurisdiction
wherein  each  Intellectual  Property  Right is  effective,  and for  each  such
jurisdiction the applicable  serial numbers and  corresponding  filing dates for
each such Intellectual Property Right, and, if applicable, the numbers and dates
corresponding to each approval,  registration or grant,  respectively;  and (iv)
the identities of all licensees or licensors of any License Rights. Section 4.15
of the  Exceptions  Letter sets forth a list of all  documents  to which T5 is a
party,  including  all  amendments  thereto,  representing  the License  Rights,
complete and correct copies of which have been  delivered to ISI.  Except as set
forth in Section 4.15 of the Exceptions  Letter,  T5 owns,  whether  pursuant to
assignment  or  otherwise,  the entire  right,  title and interest in and to the
Patents,  Trademarks,  Copyrights  and  Trade  Secrets,  and,  to  T5's  and the
Shareholders' knowledge, no such Patent,

                                      -13-
<PAGE>

Trademark,  Copyright or Trade Secret has been declared invalid,  in whole or in
part, or abandoned, dedicated, disclaimed or allowed to lapse for non-payment of
fees or taxes or for any other  reason.  Except as set forth in Section  4.15 of
the  Exceptions  Letter or in agreements  or other  documents  representing  the
License Rights that are identified in Section 4.15 of the Exceptions  Letter, to
T5's and the Shareholders'  knowledge,  (i) the License Rights are in full force
and effect and (ii) no such License  Rights have been declared  invalid in whole
or in part,  or  abandoned,  dedicated,  disclaimed  or  allowed  to  lapse  for
non-payment  of fees or taxes or for any  other  reason.  Except as set forth in
Section 4.15 of the Exceptions  Letter, T5 and the Shareholders are not aware of
any patents,  trademarks,  copyrights, or trade secrets held by any Person under
which a license is  reasonably  likely to be  required  in  connection  with the
conduct  of  the  business  of T5 or any  Subsidiary,  as  now  conducted  or as
currently  proposed to be conducted.  Except as set forth in Section 4.15 of the
Exceptions Letter, T5 and the Shareholders do not have any notice of any adverse
claim of any Person with respect to any Intellectual  Property Right or asserted
against or threatened to be asserted against T5 with respect to any Intellectual
Property Right.

         4.16 MATERIAL  CONTRACTS.  Except for the  documents  listed on Section
4.16 of the Exceptions  Letter,  there is no written contract,  debt instrument,
lease,  employment agreement or collective bargaining agreement now in effect to
which T5 is a party  which  involves  a  commitment  or  liability  in excess of
seventy-five  thousand dollars  ($75,000) or extending for a period of more than
six (6) months (each such contract, a "MATERIAL Contract"). (For the purposes of
this Agreement the term "BANK DOCUMENTS"  refers to the bank agreements,  credit
agreements,  loan  documents,  guarantees,  subordination  agreements  or  other
contracts or documents, or Contractual Obligations,  to which T5 is a party that
relate to indebtedness of seventy-five  thousand  dollars  ($75,000) or more.) A
copy of each  Material  Contract  has  been  delivered  to ISI.  To T5's and the
Shareholders'  knowledge,  to the  extent  T5 is a  party  thereto,  each of the
Material Contracts is valid,  binding,  in full force and effect and enforceable
by T5 in  accordance  with  its  terms,  subject  to the  effect  of  applicable
bankruptcy,  insolvency,  reorganization,  moratorium  or other  laws of general
application relating to or affecting  enforcement of creditors' rights and rules
of laws  concerning  equitable  remedies.  Except as otherwise  described in the
Exceptions  Letter,  T5 is  not in  default  in  the  performance  of any of its
obligations  under any  Material  Contract,  except for defaults  which,  in the
aggregate with all such defaults,  would not have a Material Adverse Effect.  To
T5's and the  Shareholders'  knowledge,  except as  otherwise  described  in the
Exceptions  Letter, no event has occurred which (whether with or without notice,
lapse  of  time  or the  happening  or  occurrence  of any  other  event)  would
constitute  a  default  by T5  under  any  Material  Contract  or to T5's or the
Shareholders' knowledge by any other party thereto, except for defaults which in
the aggregate with all such defaults would not have a Material Adverse Effect.

         4.17 CERTAIN  AGREEMENTS.  T5 is not a party to any (a) agreement  with
any of its  executive  officers,  other  employees  or any other  Person (i) the
benefits of which are contingent,  or the terms of which are materially altered,
upon the occurrence of transactions of the nature contemplated by this Agreement
or any Related Agreement, or (ii) providing severance benefits or other benefits
after the  termination  of employment of such employee  regardless of the reason
for such  termination  of  employment  which  are  conditioned  upon a change of
control  or (b)  agreement,  instrument,  option,  warrant  or plan,  including,
without limitation, any share option plan, share appreciation rights plan, share
purchase plan or any other  employee  plan, any of the benefits of which will be
increased,  or the  vesting of  benefits  of which will be  accelerated,  by the
occurrence  of any of the  transactions  contemplated  by this  Agreement or any
Related  Agreement,  or the  value  of any of the  benefits  of  which  will  be
calculated  on  the  basis  of  any of the  transactions  contemplated  by  this
Agreement or any Related  Agreement.  T5 and the Shareholders are not aware that
any  officer or key  employee  (including  those  persons  with the title  "Vice
President"),  or  any  group  of  key  employees,  intends  to  terminate  their
employment  with T5, and T5 does not have a present  intention to terminate  the
employment of any of the foregoing.  The employment of each officer and employee
of T5,  subject  to  general  principles  related  to  wrongful  termination  of
employees, is terminable,  to the best of T5's and the Shareholders'  knowledge,
at the will of T5.

                                      -14-

<PAGE>

         4.18  EMPLOYEE  MATTERS.  Except  as set forth in  Section  4.18 of the
Exceptions  Letter,  T5  has  no  employment  contract  or  material  consulting
agreement  currently in effect that is not terminable on minimum notice provided
for by Austrian law or whose lawful  termination  would result in any payment to
the terminated  employee  greater than the minimum amounts  required by Austrian
law upon termination of an employee (other than agreements with the sole purpose
of providing for the confidentiality of proprietary information or assignment of
inventions). To the best knowledge of the Shareholders and T5, no employee of T5
is  in  violation  of  (a)  any  material  term  of  any  employment   contract,
Intellectual  Property  Rights   non-disclosure   agreement  or  non-competition
agreement or (b) any material term of any other  contract or  agreement,  or any
restrictive covenant,  relating to the right of any such employee to be employed
by T5 or to use trade secrets or proprietary  information of others. To the best
of the  Shareholders'  and T5's  knowledge  the mere fact of  employment  of any
employee of T5 does not subject T5 to any  liability to any third party.  A list
of all ongoing  employees,  officers and  development  consultants of the T5 and
their current  compensation (salary and bonuses) is set forth in Section 4.18 of
the Exceptions Letter.  Section 4.18 of the Exceptions Letter contains a list of
all pension, retirement, disability, medical, dental or other health plans, life
insurance or other death benefit plans,  profit sharing,  deferred  compensation
agreements,  stock,  option,  bonus or other incentive  plans,  vacation,  sick,
holiday or other paid leave  plans,  severance  pans or other  similar  employee
benefit plans  maintained  by T5 (the  "EMPLOYEE  PLANS").  Each of the Employee
Plans, and their  administration,  is, in all material  respects,  in compliance
with all applicable national,  municipal,  local and other governmental laws and
ordinances,  orders, rules and regulations and T5 is in full compliance with the
terms of all of the  Employee  Plans.  All  contributions  due have been made or
accrued  on the  Financial  Statements  with  respect  to any  pension or profit
sharing plan  maintained  by T5 except those  contributions  accruing  after the
latest Balance Sheet in the ordinary course.

         4.19  LABOR  MATTERS.  There  is no  works  counsel  at T5  or,  to the
knowledge of T5 and the  Shareholders,  any ongoing efforts to establish a works
counsel at T5.

         4.20  TAXES.  T5 has  filed all  Austrian  and  other  foreign  tax and
information returns required to be filed, has paid all taxes required to be paid
in respect of all periods for which returns have been filed,  has established an
adequate  accrual or reserve for the payment of all taxes  payable in respect of
all  periods  ending  on or  prior to the  Latest  Balance  Sheet,  has made all
necessary  estimated  tax  payments  to the  extent  payment  is due  and has no
liability  for taxes in excess of the amount so paid or  accruals or reserves so
established  in the Financial  Statements,  except with respect to  transactions
occurring  after the Latest Balance Sheet.  True and complete copies of all such
tax and information returns requested by ISI have been provided by T5 to ISI. T5
is not delinquent in the payment of any tax or in the filing of any tax returns,
and no  deficiencies  for any tax have been  threatened,  claimed,  proposed  or
assessed  which have not been  settled or paid.  No tax  returns of T5 have ever
been  audited by the Austrian  Revenue  Service  (equivalent  to the IRS) or any
provincial  taxing  agency or authority.  For the purposes of this Section,  the
terms "TAX" and "TAXES"  include  without  limitation  all  Austrian and foreign
corporation  tax, income tax,  capital gains,  inheritance tax, value added tax,
customs duty, excise duty, national insurance,  social security, pay as you earn
and stamp  duty,  franchise,  property,  sales,  use,  consumption,  employment,
license, payroll, occupation,  recording, or any other tax, duty, levy or impost
imposed  by  any  statutory,  governmental  or  municipal  authority  whatsoever
anywhere in the world (whether payable  directly or by  withholding),  and, with
respect to such taxes, any estimated tax, interest and penalties or additions to
tax and interest on such  penalties  and additions to tax. T5 will not incur any
stamp duty tax or other  similar tax or charge  imposed by the  Austrian  taxing
authorities as a result of the Transaction.

                                      -15-

<PAGE>

         4.21 OTHER TRANSACTIONS.  Except for the transactions contemplated with
ISI, or the ISI Austrian Subsidiary,  pursuant to this Agreement, T5 (i) has not
reached  agreement  for the  acquisition  of all or any portion of the assets or
share interests (currently  outstanding or to be issued) of any other entity and
(ii)  has  not  reached  agreement  for  the  sale  or  acquisition  of all or a
substantial  portion of T5's assets or any portion of share  interests  (whether
currently outstanding or to be issued) by any other entity.

         4.22 BROKERS,  FINDERS, ETC. Except as set forth in Section 4.22 of the
Exceptions Letter, T5 and the Shareholders have not employed, nor are subject to
the valid  claim of, any  broker,  finder or other  financial  intermediary,  in
connection  with the  transactions  contemplated  by this Agreement who might be
entitled to a fee or commission.

         4.23 FULL DISCLOSURE.  T5 and the Shareholders have heretofore made all
of the corporate books, corporate records,  agreements and other documents of T5
or portions thereof relating to the transactions  contemplated by this Agreement
and the Related Agreements available to ISI for inspection and due diligence. To
the knowledge of T5 and the  Shareholders,  such  corporate  books and corporate
records,  agreements and documents and all other documents and papers  delivered
to ISI by or on behalf of T5 in connection  with this  Agreement and the Related
Agreements and the transactions contemplated hereby and thereby, a list of which
is set forth in Exhibit E, are accurate, complete and authentic. Furthermore, to
the knowledge of T5 and the Shareholders,  the representations and warranties of
T5 and the  Shareholders  in this  Agreement and the Related  Agreements and the
information  contained in the foregoing materials and furnished to ISI by T5 and
the  Shareholders in connection  with this Agreement and the Related  Agreements
and the transactions  contemplated  hereby and thereby do not contain any untrue
statement of a material fact and do not omit to state any fact necessary to make
the  statements  made,  in the  context  in which  they are  made,  not false or
misleading.

         4.24  INDEBTEDNESS.  Except  as  set  forth  in  Section  4.24  of  the
Exceptions Letter, T5 is not indebted to any Person in an amount exceeding fifty
thousand  dollars  ($50,000).  Section 4.24 of the Exceptions  Letter lists each
bank  agreement,  credit  agreement,  loan  document,  guarantee,  subordination
agreement or other contract or document,  or Contractual  Obligation to which T5
is a party that related to indebtedness of fifty thousand  dollars  ($50,000) or
more.

         4.25  ACCOUNTING   MATTERS.  To  the  best  knowledge  of  T5  and  the
Shareholders, neither T5 nor any of its Shareholders has taken or agreed to take
any action that without  giving effect to any action taken or agreed to be taken
by ISI or any of its  affiliates,  would  prevent ISI from  accounting  for this
business  combination  to  be  affected  by  the  Transaction  as a  pooling  of
interests.

         4.26  ENVIRONMENTAL  MATTERS.  To the Shareholders' and T5's knowledge,
during  the  period  that T5 has  leased  its  properties,  there  have  been no
disposals,  releases  or  threatened  releases  of  hazardous,  toxic  or  other
dangerous materials ("HAZARDOUS MATERIALS") from or any presence thereof on such
properties  which  would have a Material  Adverse  Effect  upon the  business or
Financial  Statements  of T5.  During  the time that T5 has owned or leased  its
properties,  there has been no litigation,  proceeding or administrative  action
brought or threatened  in writing  against T5, or any  settlement  reached by T5
with,  any  party  or  parties  alleging  the  presence,  disposal,  release  or
threatened  release of any  Hazardous  Materials  on,  from or under any of such
properties.

         4.27  INFORMATION  REVIEWED.  T5 and the  Shareholders  have  read  all
documents that ISI has filed with the SEC and all press  releases  issued by ISI
in the last two (2) years.

                                      -16-

<PAGE>



         4.28  DUE  DILIGENCE.  T5 and the  Shareholders  have  completed  a due
diligence investigation of ISI to their satisfaction.


                                    ARTICLE V
                      REPRESENTATIONS AND WARRANTIES OF ISI

         Subject to the exceptions  set forth in the letter  delivered by ISI to
T5 and the  Shareholders  concurrently  herewith (the "ISI EXCEPTIONS  LETTER"),
attached  hereto as Exhibit F, ISI hereby  represents and warrants to T5 and the
Shareholders, as of the date hereof and as of the Closing Date, that:

         5.1 DUE ORGANIZATION.  ISI (i) is duly organized,  validly existing and
in good standing under the laws of its  jurisdiction of  incorporation  and (ii)
the  corporate  power and  authority  and the legal right to own and operate its
property,  to lease the  property  it  operates  as lessee  and to  conduct  its
business as now being  conducted and as proposed to be conducted,  except to the
extent the  failure to have such power,  authority  or legal right would not, in
the aggregate with all such other failures, have a Material Adverse Effect.

         5.2  CORPORATE  POWER.  ISI  has  all  requisite  corporate  power  and
authority to enter into and deliver this  Agreement  and each Related  Agreement
and to perform its obligations  hereunder and thereunder.  ISI is not in default
in the  performance,  observance or  fulfillment of any provision of its charter
documents.  Complete  and correct  copies of the Articles of  Incorporation  and
Bylaws (or similar  charter  documents)  of ISI,  as amended to date,  have been
delivered  to T5.  ISI  is not in  default  in the  performance,  observance  or
fulfillment  of any  provision  of its Articles of  Incorporation  or Bylaws (or
similar charter documents).

         5.3 CAPITALIZATION. The authorized capital of ISI as of August 31, 1995
is as set forth in the most  recently  filed  10Q (the  "10Q")  for the  quarter
ending August 31, 1995.  All ISI Common Stock is duly  authorized and fully paid
and the  terms of such  Common  Stock  are as set  forth in  ISI's  Articles  of
Incorporation, a copy of which has been delivered to T5.

         5.4  AUTHORIZATION AND VALIDITY OF AGREEMENT.  The execution,  delivery
and  performance  by ISI of this  Agreement  and each Related  Agreement and the
consummation by it of the transactions contemplated hereby and thereby have been
duly  authorized  by  all  requisite  corporate  action.   Except  as  otherwise
contemplated by this Agreement,  no other corporate action on the part of ISI is
necessary for the execution,  delivery and performance by ISI, as applicable, of
this  Agreement  and each  Related  Agreement  and the  consummation  by ISI, as
applicable,  of the transactions contemplated hereby and thereby. This Agreement
and each Related Agreement has been duly executed and delivered by ISI, and this
Agreement and the Related  Agreements  constitute  the legally valid and binding
obligations of ISI,  enforceable  against it in accordance with their respective
terms,  except as  enforceability  may be  limited  by  bankruptcy,  insolvency,
reorganization,  moratorium  and other  similar  laws  relating to or  affecting
creditors'  rights generally or by general equitable  principles  (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

         5.5 INVESTMENT INTENT. The share interests to be acquired by ISI (or if
applicable  the ISI  Austrian  Subsidiary),  pursuant  to  Article  II are being
acquired by ISI (or if applicable the ISI Austrian  Subsidiary),  solely for its
own account,  for investment  purposes  only,  and with no present  intention of
distributing, selling or otherwise disposing of such share interests, other than
in accordance with applicable securities laws.

                                      -17-

<PAGE>

         5.6 SOPHISTICATION. ISI (or if applicable, the ISI Austrian Subsidiary)
is able to bear the economic risk of an investment in the securities acquired by
it pursuant to this Agreement and has such knowledge and experience in financial
and business  matters that it is capable of  evaluating  the merits and risks of
the  proposed  investment  and  therefore  has the  capacity  to protect its own
interests  in  connection  with  the  purchase  of the  securities.  ISI  (or if
applicable,  the ISI Austrian Subsidiary) has had access to and has reviewed and
understood all material information,  including financial statements, concerning
T5 that it deems  necessary  or  advisable  in order to  evaluate  the risks and
merits of entering into this  transaction  and  acquiring  the  securities to be
issued hereunder.  ISI (or if applicable,  the ISI Austrian Subsidiary) has been
given  the  opportunity  to ask  questions  and  receive  answers  from T5,  the
Shareholders,  the  officers  and any  Persons  acting  on  behalf of T5 and the
Shareholders and has made such further  investigation  as it deemed  appropriate
with respect to the transactions contemplated hereby.

         5.7 BROKERS,  FINDERS, ETC. ISI has not employed,  nor is it subject to
the  valid  claim of any  broker,  finder  or other  financial  intermediary  in
connection  with the  transactions  contemplated  by this Agreement who might be
entitled to a fee or commission.

         5.8 LEGAL  PROCEEDINGS.  ISI warrants that: (a) there is no pending or,
to  the  best  of  ISI's   knowledge,   threatened   claim,   action,   lawsuit,
administrative   proceeding,   arbitration,   labor   dispute  or   governmental
investigation  ("LITIGATION")  to which  ISI is a party or by which any of ISI's
material  assets may be bound,  which,  if  adversely  determined,  could have a
Material Adverse Effect,  and (b) to ISI's  knowledge,  no facts exist that give
rise to a valid claim against ISI for breach of an obligation,  or for violation
of applicable  law, rule or  regulation,  where such claim could have a Material
Adverse Effect. ISI is not subject to any judgment,  order, writ,  injunction or
decree of any court,  arbitrator or other  competent  governmental or regulatory
authority.  ISI has not been  permanently or temporarily  enjoined by any order,
judgment or decree of any court or other  competent  governmental  or regulatory
authority  from engaging in or continuing  any conduct or practice in connection
with its business, nor requiring ISI to take any action of any kind with respect
to its business.

         5.9  GOVERNMENTAL  CONSENTS.  Except as specifically  set forth in this
Agreement,  no consent,  approval,  order or authorization  of, or registration,
declaration  or filing  with,  any  Governmental  Authority  is  required  to be
obtained  or made by ISI (or if  applicable,  the ISI  Austrian  Subsidiary)  in
connection  with the  execution  and delivery of the  Agreement  and the Related
Agreements or the  consummation of the transactions  contemplated  hereby by ISI
(or if applicable,  the ISI Austrian Subsidiary),  except for (a) such consents,
approvals, orders,  authorizations,  registrations,  declarations and filings as
may be required under  applicable  securities  laws and (b) such other consents,
orders,  authorizations,  filings,  approvals  and  registrations  which  if not
obtained or made would not in the aggregate have a Material Adverse Effect.

         5.10 FINANCIAL STATEMENTS. ISI has delivered to T5 and the Shareholders
true and complete copies of (i) the audited  consolidated  balance sheets of ISI
for FYE February 28, 1995, and related consolidated  statements of operation and
cash flows of ISI for the twelve (12) months  then ended,  accompanied  by notes
and  the  certificate  of  Coopers  &  Lybrand,   independent  certified  public
accountants,  and (ii) the  unaudited  consolidated  balance  sheets  of ISI for
August 31, 1995 (the  "LATEST  BALANCE  SHEET"),  and the  related  consolidated
statement  of  operations  and cash flows of ISI for the  six-month  period then
ended and 10Q's filed since the FYE February 28, 1995.  The foregoing  financial
statements and notes are  collectively  referred to herein as the "ISI FINANCIAL
STATEMENTS".  The ISI Financial  Statements  are accurate and fairly present the
financial  condition of ISI at the respective dates therein indicated and in the
case of the  audited  ISI  Financial  Statements  only,  have been  prepared  in
accordance with GAAP applied on a consistent basis.

                                      -18-

<PAGE>

         5.11  ABSENCE  OF  CERTAIN   CHANGES.   Except  for  the   transactions
contemplated hereby and except as set forth in the ISI Exceptions Letter,  since
August  31,  1995  (except  where a  later  date is  indicated  below),  ISI has
conducted  its business  only in the ordinary and usual course and there has not
been:

                  (a) any change in the financial condition, properties, assets,
liabilities or operations of ISI which change by itself or in  conjunction  with
all other  such  changes,  whether  or not  arising  in the  ordinary  course of
business,  has had or can  reasonably  be  expected  to have a Material  Adverse
Effect on ISI;

                  (b) any  development,  event or  condition or  combination  of
developments,  events or  conditions  relating to ISI of which ISI has knowledge
which may result in a Material Adverse Effect;

                  (c) any  damage,  destruction  or  loss,  whether  covered  by
insurance or not,  materially and adversely affecting the properties or business
of ISI taken as a whole; or

                  (d) except as specifically contemplated by this Agreement, any
agreement by ISI to take any action described in this Section 5.11.

         5.12 REGISTRATION ON FORM S-3. ISI currently qualifies for registration
of its Common Stock on SEC Form S-3.

         5.13 DUE DILIGENCE.  ISI has completed a due diligence investigation of
T5 to its satisfaction.


                                   ARTICLE VI
                                    COVENANTS

         6.1 ADVICE OF CHANGES.  From and after the date of this  Agreement  and
until the  Closing or the earlier  termination  of this  Agreement,  each of the
parties  will  promptly  advise the other  parties  in writing  (a) of any event
occurring  subsequent  to the  date of this  Agreement  that  would  render  any
representation  or warranty of that party  contained  in this  Agreement  or the
Related  Agreements,  as if made on or as of the date of such  event,  untrue or
incomplete in any material  respect,  (b) of any event having a Material Adverse
Effect with respect to the party and taken as a whole,  and (c) of any breach by
the party of any  covenant  or  agreement  contained  in this  Agreement  or the
Related Agreements.

         6.2  CONDUCT OF  BUSINESS.  Except as  permitted  or  required  by this
Agreement,  or otherwise  consented to or approved in writing by ISI, during the
period  commencing on the date hereof and until the Closing the Shareholders and
T5 covenant and agree to endeavor to preserve and conduct the  operations  of T5
and maintain the assets of T5 in a manner consistent with the ordinary course of
its business, and further covenant and agree not to take any action or to permit
any of T5's  Shareholders,  officers or  directors to take any action that would
have a Material  Adverse  Effect with  respect to T5. T5 will not enter into any
transaction  or  agreement  or take any  action  out of the  ordinary  course of
business  or enter into any  transaction  or make any  commitment  involving  an
expense  or  capital  expenditure  by T5 in  excess  of fifty  thousand  dollars
($50,000)  in the  aggregate  without  ISI's  prior  consent.  T5 will not sell,
license or encumber any of its tangible or  intangible  assets  (except  product
sales/licenses in the ordinary cause of business),  declare any dividends, grant
share options, or rights to acquire any such options,  shares or securities,  or
make any commitments with respect to any of the foregoing,  from the date hereof
until the Closing, except as the Shareholders, T5 and ISI shall mutually agree.

                                      -19-
<PAGE>

         6.3 CERTAIN  DEFAULTS.  From and after the date of this  Agreement  and
until the Closing, the Shareholders and T5 will give prompt notice to ISI of (a)
any notice of default  received  by T5 or the  Shareholders  under any  material
instrument or agreement to which T5 is a party or by which T5 is bound,  and (b)
any suit, action or proceeding instituted or threatened against or affecting T5.

         6.4 SATISFACTION OF CONDITIONS PRECEDENT.  Each of the parties will use
their  best  efforts  to satisfy  or cause to be  satisfied  all the  conditions
precedent to the obligations of such other party, and the parties will use their
best  efforts to cause the  transactions  contemplated  by this  Agreement to be
consummated.

         6.5 FURTHER ACTIONS.  Subject to the terms and conditions  hereof,  T5,
the Shareholders and ISI agree to use commercially  reasonable efforts to obtain
all written consents, take, or cause to be taken, all action and to do, or cause
to be done, all things reasonably  necessary,  proper or advisable to consummate
and make  effective  the  transactions  contemplated  by this  Agreement and the
Related Agreements and to satisfy the conditions hereto and thereto.

         6.6  BOARD  OF  DIRECTORS.  (a) Upon the  Closing,  if duly  appointed,
Christian Kleinferchner will continue as a director of T5. Concurrently with the
execution  and  delivery of this  Agreement,  each of the other  directors  will
deliver to T5 their executed written  resignations as directors of T5, effective
as of the Closing.  Subsequent to the Closing,  the sole  shareholder of T5 will
appoint Naren Gupta and David St. Charles as T5 directors.

         6.7  CONSENTS.  The parties will  diligently  use their best efforts to
obtain as promptly as  possible  all  consents,  approvals,  orders,  waivers or
authorizations of, or registrations,  qualifications, designations, declarations
or filings  with,  any court or any federal or state  governmental  authority or
third  party  required  on the  part  of  such  party  in  connection  with  the
consummation of the transactions contemplated by this Agreement.

         6.8 NO INTERIM ISSUANCE OF SECURITIES OR OTHER COMMITMENTS.  During the
period commencing with the date of this Agreement and ending at the Closing,  T5
will  not,  and the  Shareholders  will not  cause  T5,  to (i)  issue any share
interests  or  other  securities  or  rights  or  commitments  with  respect  to
securities  of T5, (ii) make any changes in T5's salary and bonus  plans,  (iii)
enter into any  "golden  parachute"  arrangements,  (iv)  approve  increases  in
salaries or make payments of bonuses, (v) approve any amendments to its Articles
of  Association  or Bylaws,  and (vi) make any  commitment by T5 with respect to
such foregoing  actions,  without first obtaining the written consent of ISI for
such actions or issuances, including the specific terms thereof.

         6.9  SHAREHOLDER  APPROVAL.  The  Shareholders  shall agree to exchange
their  respective  T5 Shares  for ISI Common  Stock and  execute  the  necessary
agreements to do so.

         6.10 BINDING  AGREEMENT.  T5, the  Shareholders and ISI agree that this
Agreement shall be binding on all parties,  subject to satisfaction or waiver of
the  conditions  precedent  to  Closing,  as  specified  in Article  VII of this
Agreement.  Each of the parties  acknowledge  that each party to this  Agreement
would  suffer  irreparable  damages in the event that any party fails to perform
its  obligations  under this  Agreement or otherwise  breaches the terms of this
Agreement. Therefore, each party shall have all remedies available at law and in
equity,  including,  but not limited to,  injunctive  relief and money  damages,
notwithstanding Section 10.15 of this Agreement.

         6.11 AFFILIATES.  If not previously executed,  the affiliate agreements
(the "AFFILIATE  AGREEMENTS") in the form attached as Exhibit G will be executed
by the T5  Affiliates  and ISI  affiliates.  ISI  shall  be  entitled  to  place
appropriate legends on the certificate evidencing any shares

                                      -20-
<PAGE>

of ISI Common  Stock to be  received by T5  Affiliates  pursuant to the terms of
this  Agreement  and to issue  appropriate  stop  transfer  instructions  to the
transfer agent for shares of ISI Common Stock  consistent  with the terms of the
Affiliate Agreements.

         6.12 POOLING.  Each party will not, nor will they cause any other party
to, take any action, whether before or after the Closing, which would disqualify
this Transaction as a pooling of interests for accounting purposes.

         6.13  NONCOMPETITION AND NONSOLICITATION  AGREEMENT.  Subsequent to the
issuance of the Permit, each of the Shareholders and Christian Kleinferchner, as
a former T5 shareholder, shall enter into a mutually acceptable agreement to not
compete,  directly or indirectly,  with ISI and the ISI Austrian Subsidiary,  if
applicable,  or  its  Subsidiaries  (including  T5)  or  solicit  any  of  their
respective  employees  or  customers  for a term  of  thirty  (30)  months  (the
"NONCOMPETITION  AND NONSOLICITATION  AGREEMENT"),  in a form attached hereto as
Exhibit H.

         6.14 EMPLOYMENT  AGREEMENTS.  Subsequent to the issuance of the Permit,
employment  agreements  between  T5, ISI and  certain of the  Shareholders  (the
"EMPLOYMENT  AGREEMENTS")  attached  hereto  as  Exhibit  I, in a form  mutually
agreeable  to ISI, T5 and  certain of the  Shareholders,  shall be executed  and
delivered at Closing. The Employment Agreements shall provide for a two (2) year
term.

         6.15 FORMAL NOTARIZATION. Subsequent to the issuance of the Permit, the
parties, including the ISI Austrian Subsidiary, if applicable, shall execute the
sale of T5  Shares in  notarial  form in  accordance  with the  requirements  of
applicable law.

         6.16 TRUST  BENEFICIARIES.  To the  extent  that any  Shareholders'  T5
Shares are held in a trust,  any individuals who are named  beneficiaries of the
trust (the "TRUST  BENEFICIARIES") shall also be obligated under this Agreement,
as a party hereto.


                                   ARTICLE VII
                         CONDITIONS PRECEDENT TO CLOSING

         7.1 CONDITIONS PRECEDENT TO OBLIGATIONS OF PARTIES. None of the parties
hereto will be obligated to  consummate  at the Closing any of the  transactions
provided for herein if any  preliminary  or permanent  injunction or other order
issued by any federal or state  court of  competent  jurisdiction  in the United
States  or by any  United  States  or  other  Governmental  Authority  or of any
statute,  rule,  regulation  or executive  order  promulgated  or enacted by any
United States or other Governmental  Authority which is in effect at the Closing
restrains,  enjoins or otherwise  prohibits the consummation of such transaction
at the Closing.

         7.2  CONDITIONS  PRECEDENT TO OBLIGATIONS OF ISI. The obligation of ISI
to  consummate  at the Closing any of the  transactions  provided  for herein is
subject  to the  satisfaction,  at or  prior  to the  Closing,  of  each  of the
following additional conditions:

                  (a) Accuracy of Representations and Warranties.  ISI will have
received  a  certificate  of the  Shareholders  and T5,  dated  the  date of the
Closing,  that the  representations  and  warranties of T5 and the  Shareholders
contained  herein  are true and  complete  in all  material  respects  as of the
Closing.

                                      -21-

<PAGE>



                  (b) Managing  Director's  Certificate.  ISI will have received
from the Shareholders and T5 a copy of the Articles of Association and Bylaws of
T5, certified by the Managing  Director of T5, on behalf of the Shareholders and
T5, as in effect at all relevant times.

                  (c) Additional  Documents and Matters.  ISI will have received
each  additional  document,  instrument,  legal  opinion or item of  information
reasonably requested by ISI, including,  without limitation,  a copy of any debt
instrument,  security  agreement or other material contract to which T5 may be a
party  and that is  reasonably  available  to T5 as is  necessary  to close  the
Transaction,  complete  the  Fairness  Hearing  process,  and to comply with any
obligations under this Agreement.

                  (d)  Material  Adverse  Change  in T5.  There  will  not  have
occurred after the date hereof any event resulting in a Material  Adverse Effect
as to the business, operations, or financial condition of T5.

                  (e) Other Actions. The following actions will have been taken:
the  consents,  approvals,  orders,  waivers or  authorizations,  registrations,
qualifications,  designations,  declarations and filings will have been obtained
as provided in Section 6.7.

                  (f) Legal  Opinion.  ISI shall  have  received  an  opinion of
Wilson Sonsini  Goodrich & Rosati,  counsel of the  Shareholders  and T5, in the
form and substance reasonably  satisfactory to ISI, which may be based, in part,
on the legal opinion of T5's Austrian counsel.

                  (g) No Interim  Issuance of Securities  or Other  Commitments.
During the period  commencing  with the date of this Agreement and ending at the
Closing,  T5 will not, and the Shareholders  will not cause T5, to (i) issue any
share  interests,  or other  securities or rights or commitments with respect to
securities  of T5, (ii) make any changes in T5's salary and bonus  plans,  (iii)
enter into any  "golden  parachute"  arrangements,  (iv)  approve  increases  in
salaries or payments of bonuses,  (v) approve any  amendments to its Articles or
Bylaws,  and (vi)  make any  commitment  by T5 with  respect  to such  foregoing
actions,  without first obtaining the written consent of ISI for such actions or
issuances, including the specific terms thereof.

                  (h)  Pooling  of  Interests,   Representation   Letters.   The
Shareholders  and T5 shall not have breached  their  representations  in Section
4.25 or their covenant in Section 6.12 with the result that the Transaction will
not qualify for pooling of interest accounting treatment.

                  (i) Notarization. Subsequent to the issuance of the Permit, or
alternative  qualification  pursuant to Section 2.7(b),  the Shareholders  shall
have  executed  the sale of T5 Shares in notarial  form in  accordance  with the
requirements of applicable law.

                  (j)  Assignment of Inventions  Agreements.  All  Shareholders,
officers,  and all present and former development employees and consultants that
have been  involved  in the  development  of software  at T5 have  executed  and
delivered  to T5 an  agreement  regarding  the  protection  of such  proprietary
information  and  the  assignment  of  inventions  to T5 in form  and  substance
reasonably satisfactory to ISI.

                  (k) Share  Interests.  ISI shall be  satisfied  that the share
interests  reflected in Exhibit A to this  Agreement are true and  accurate,  in
accordance  with Austrian law, and T5 and the  Shareholders  shall have provided
satisfactory  proof of the title-chain  and documentary  evidence of all present
and previous  shareholder  consents to prior share  transfers in accordance with
Austrian law.

                                      -22-

<PAGE>



                  (l) Execution of the Agreement. Each of the Shareholders shall
have executed this Agreement.

         7.3 CONDITIONS PRECEDENT TO OBLIGATIONS OF T5 AND THE SHAREHOLDERS. The
obligation  of the  Shareholders  and T5 to consummate at the Closing any of the
transactions provided for herein is subject to the satisfaction,  at or prior to
the Closing, of each of the following additional conditions:

                  (a)   Accuracy  of   Representations   and   Warranties.   The
Shareholders and T5 will have received a certificate of ISI,  executed on behalf
of ISI by an executive officer thereof,  dated the date of the Closing, that the
representations  and warranties of ISI contained herein are true and complete in
all material respects at and as of the Closing.

                  (b) Legal Opinion. The Shareholders and T5 shall have received
an  opinion  of  Fenwick  & West,  counsel  to ISI,  in the form  and  substance
reasonably satisfactory to the Shareholders.

                  (c) Tradeable Securities. The ISI Common Stock received by the
Shareholders  in exchange for the T5 Shares shall be tradeable under Rule 145 of
the Securities Act in accordance with the provisions of Rule 145.

                  (d)  Notarization.  Subsequent  to the issuance of the Permit,
ISI, and if  applicable,  the ISI Austrian  Subsidiary,  shall have executed the
sale of T5  Shares in  notarial  form in  accordance  with the  requirements  of
applicable law.

                  (e) Fairness Hearing. ISI shall have received the issuance the
Permit by the California Department of Corporations following a Fairness Hearing
for this Transaction and the issuance of the ISI Common Stock shall be an exempt
transaction under Section 3(a)(10) of the Securities Act, or in the alternative,
pursuant  to Section  2.7(b) of this  Agreement,  ISI shall have  qualified  the
Transaction  under an  alternative  exemption,  provided the  Shareholders  have
substantially  the same  liquidity  as the  liquidity  obtained  from a Fairness
Hearing.

                  (f)  Material  Adverse  Change  in ISI.  There  will  not have
occurred after the date hereof any event resulting in a Material  Adverse Effect
as to the business, operations, or financial condition of ISI.


                                  ARTICLE VIII
                       TERMINATION, AMENDMENT AND WAIVERS

         8.1 TERMINATION.  This Agreement may be terminated and the transactions
contemplated hereby may be abandoned prior to the Closing:

                  (a)      by mutual consent of ISI, the Shareholders and T5;

                  (b) by  either  ISI or the  Shareholders  and T5  prior to the
Closing,  if all the conditions to that party's  performance at the Closing will
not have been  satisfied  or waived by the close of business on October 31, 1995
other than as a result of a breach of this Agreement by the terminating party;

                                      -23-

<PAGE>



                  (c) by either ISI or the  Shareholders  and T5, 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  provided
for in this  Agreement  will have been  issued  and will have  become  final and
nonappealable;

                  (d) by the Shareholders and T5, if any  representations of ISI
in this Agreement (with such changes as may been made therein in compliance with
this  Agreement)  will be  materially  false or if ISI  will  have  committed  a
material breach of its obligations  under this Agreement and will have failed to
cure such breach after  reasonable  notice  thereof (but in any event within ten
(10) days after such notice).

                  (e) by ISI, if any  representations  of the Shareholders or T5
in this Agreement (with such changes as may been made therein in compliance with
this Agreement) will be materially  false or if the Shareholders or T5 will have
committed a material  breach of its  obligations  under this  Agreement and will
have failed to cure such breach  after  reasonable  notice  thereof  (but in any
event within ten (10) days after such notice).

         8.2 PROCEDURE UPON TERMINATION. In the event of the termination of this
Agreement by any party in accordance with Section 8.1, such party shall promptly
give written  notice thereof to the other parties hereto and this Agreement will
terminate and the  transactions  contemplated  hereby will be abandoned  without
further action by any of the parties hereto,  except that Articles IV, V, IX and
X will survive any such termination.

         8.3 AMENDMENT AND MODIFICATION; WAIVER. Subject to applicable law, this
Agreement  may be amended,  modified and  supplemented  by a written  instrument
authorized and executed on behalf of ISI, the  Shareholders and T5. No waiver by
either party of any of the provisions hereof will be effective unless explicitly
set forth in writing and executed by the party so waiving. Except as provided in
the preceding sentence,  no action taken pursuant to this Agreement,  including,
without  limitation,  any  investigation  by or on behalf of any party,  will be
deemed to constitute a waiver by the party taking such action of compliance with
any representations, warranties, covenants or agreements contained herein and in
any  documents  delivered or to be delivered  pursuant to this  Agreement and in
connection  with the  Closing  hereunder.  The  waiver by any party  hereto of a
breach of any provision of this  Agreement will not operate or be construed as a
waiver of any other or subsequent breach.


                                   ARTICLE IX
                                 INDEMNIFICATION

         9.1  INDEMNIFICATION.  During the  Indemnification  Period (as  defined
below),  the  Shareholders  shall  indemnify  and  hold  harmless  ISI  and  its
respective shareholders,  Subsidiaries,  officers, directors, agents, employees,
representatives,  attorneys,  successors  and assigns  (hereinafter  referred to
individually  as  an  "INDEMNIFIED  PERSON"  and  collectively  as  "INDEMNIFIED
PERSONS")  from and  against any and all losses,  costs,  damages,  liabilities,
expenses,  claims,  demands,  actions and causes of action,  including,  without
limitation,  reasonable  attorneys'  fees and expenses and any diminution in the
value of securities owned by an Indemnified Person  (hereinafter  referred to as
"DAMAGES"),  arising out of any inaccuracy or breach of or default in connection
with any of the  representations  or warranties at the time made or deemed to be
made, or any of the covenants or agreements  made, by the Shareholders and T5 in
this Agreement or any Related Agreement. The Shareholders shall not be obligated
to provide indemnification under this Section 9.1 unless and until the aggregate
Damages for which one or

                                      -24-
<PAGE>

more Indemnified Persons seeks such indemnification  exceeds $200,000,  in which
event the Shareholders  shall be obligated to provide such  indemnification  for
those  Damages and for all other  Damages.  The total  liability  hereunder  for
Damages shall not exceed $3,000,000,  which is twenty percent (20%) of the total
consideration  of  $15,000,000,  as set forth in Section 2.1.  Each  Shareholder
shall be equally liable for the Damages except that no one Shareholder  shall be
liable for any amount of Damages  that exceeds the value of the ISI Common Stock
received by the Shareholder in exchange for the  Shareholder's  T5 Shares at the
time of  Closing  net of any  tax and  other  payments  made by the  Shareholder
directly  related to the  Transaction.  The amount of any Damages owed hereunder
shall be reduced by any ISI tax benefit that arises as a result of the Claim for
Indemnification (as defined below) and by any insurance proceeds received by the
Indemnified Person. The indemnification  provided under this Section 9.1 will be
the sole  remedy  available  to any  Indemnified  Person  for any  breach of the
representations   and  warranties  made  in  this  Agreement,   other  than  for
intentional or fraudulent omissions or misstatements or willful misconduct.  The
obligation  of T5 to repay the subsidies  received from the Austrian  Government
shall give rise to a Claim for Indemnification as defined in Section 9.3 below.

         9.2  INDEMNIFICATION  PERIOD. The  "INDEMNIFICATION  PERIOD" shall mean
that  period  commencing  on the date  hereof  and  terminating:  (i)  after the
delivery to ISI of the first independent audit of T5 for the year ended February
29, 1996 following  consummation  of the  combination,  for items expected to be
encountered  in the audit  process (but such period to end no later than one (1)
year from the Closing Date) provided that ISI shall have a reasonable  period of
time,  not to exceed  ninety (90) days, to review the audit results to determine
if any Claim for  Indemnification  exists or (ii) one (1) year from the  Closing
Date for all other items.  Provided however, in all cases as to matters which an
Indemnified  Party has given written notice of a Claim for  Indemnification  (as
defined  below)  during  the   Indemnification   Period  of  (i)  or  (ii),  the
Indemnification  Period with respect thereto shall continue until such Claim for
Indemnification  is  finally  resolved  and  the  Shareholders'  indemnification
obligations under Section 9.1 hereof with respect thereto are fully satisfied.

         9.3  PROSECUTION  OR  DEFENSE  OF A  CLAIM.  After  the  receipt  by an
Indemnified  Person of notice or discovery of any claim,  damage or legal action
or proceeding giving rise to indemnification  rights under Section 9.1 hereof (a
"CLAIM FOR INDEMNIFICATION"), such Indemnified Person will give the Shareholders
written notice of the Claim for  Indemnification  in accordance with Section 9.4
hereof.  Within the earlier of thirty (30) days after such written notice or ten
(10) days  before any answer must be filed with the court  respecting  the Claim
for Indemnification,  the Shareholders may, at their sole expense, elect to take
all necessary  steps  properly to contest and prosecute to conclusion  the Claim
for Indemnification to the extent it involves third parties; provided,  however,
that  the   Shareholders   may  only   compromise   or  settle   the  Claim  for
Indemnification  if the  Indemnified  Person has granted prior  written  consent
thereto,  which consent (a) shall not be unreasonably  withheld and (b) shall be
deemed given by the  Indemnified  Person if such person does not respond  within
thirty  (30)  days  after  receipt  of  written  notice  of such  compromise  or
settlement   (or  such   shorter   notice  as  may  be   reasonable   under  the
circumstances),  but in no  event  (even in  extreme  circumstances)  less  than
forty-eight  (48)  hours  after  such  receipt.  If the  Shareholders  make  the
foregoing  election,  then the Indemnified Person will have the right at its own
expense to participate in (but not to control or direct) all proceedings. If the
Shareholders  do not make such election,  then the  Indemnified  Person shall be
free to handle the prosecution or defense of such Claim for Indemnification.  In
any case, the party not in control of a Claim for Indemnification will cooperate
with the other party in the conduct of the  prosecution or defense of such Claim
for Indemnification.

         9.4  NOTICE OF CLAIM FOR  INDEMNIFICATION.  Each  notice of a Claim for
Indemnification   by  an   Indemnified   Person   (the   "NOTICE  OF  CLAIM  FOR
INDEMNIFICATION")  will be in writing and will contain, to the extent reasonably
available to such Indemnified Person, (i) an

                                      -25-
<PAGE>



estimate of the maximum  amount of the Damages  (which  amount may be revised by
such Indemnified  Person at any time) and (ii) a brief description of the facts,
circumstances  or  events  giving  rise  to  the  Damages,  including,   without
limitation,  the identity and address of any third-party  claimant and copies of
any formal demand or complaint.

         9.5   RESOLUTION   OF  NOTICE  OF  CLAIM.   Any  Notice  of  Claim  for
Indemnification  delivered by an Indemnified Person to the Shareholders pursuant
to Section 9.4 hereof will be resolved as follows:

                  (a) In the  event  that the  Shareholders  do not  contest  in
writing to the Indemnified  Person the underlying  liability upon which a Notice
of Claim  for  Indemnification  is  based,  the  Shareholders  shall pay to such
Indemnified  Person  within thirty (30) calendar days after that Notice of Claim
for  Indemnification  is  delivered  to the  Shareholders  the  amount  demanded
therein.

                  (b) In the event that the  Shareholders  give  written  notice
contesting  all or a portion  of a Notice of Claim for  Indemnification  to such
Indemnified Person (a "CONTESTED CLAIM FOR  INDEMNIFICATION")  within the thirty
(30) day period provided above, the Shareholders' liability under that Contested
Claim for Indemnification will be settled by binding arbitration as set forth in
Section 10.15 of this  Agreement.  The final decision of the arbitrator  will be
furnished to the  Shareholders,  ISI and such Indemnified  Person in writing and
will  constitute a conclusive  determination  of the issue in question,  binding
upon such parties.

                  (c) Any amount owed by the  Shareholders  to such  Indemnified
Person  hereunder shall be paid first by the return of a number of shares of the
ISI Common Stock  determined.  The total number of shares of ISI Common Stock to
be  returned  to ISI in  payment  of the amount  owed by the  Shareholders  (the
"INDEMNITY  SHARES") shall be determined by dividing the amount owed by the fair
market value of the ISI Common Stock on the Closing Date.  Provided however,  if
the ISI Common Stock is no longer held by the  Shareholders  or an  insufficient
number of shares is held,  the amount  owed shall first be paid by the return of
ISI Common Stock held by the  Shareholders  (the "RETURNED  SHARES") and then in
cash in U.S. dollars.  The cash settlement to be paid to the Indemnified  Person
is based  upon the sum of the  number of  Indemnity  Shares  minus the number of
Returned Shares,  multiplied by the fair market value of the ISI Common Stock on
the Closing Date.

                  (d) An  Indemnified  Party need not exhaust any other remedies
that may be available to it before it proceeds  directly in accordance  with the
provisions   of  this  Article  IX.  The  assertion  of  any  single  Claim  for
Indemnification  hereunder  will not bar any  Indemnified  Person from asserting
other Claims for Indemnification hereunder.


                                    ARTICLE X
                               GENERAL PROVISIONS

         10.1  SURVIVAL OF  REPRESENTATIONS  AND  WARRANTIES.  Regardless of any
investigation  made  by or on  behalf  of  any  party  to  this  Agreement,  all
representations  and  warranties  contained  in or made in  writing  by T5,  the
Shareholders or ISI pursuant to this Agreement will survive the Closing.

         10.2 EXPENSES;  CERTAIN FEES;  TAXES.  ISI will pay the reasonable fees
and  expenses  (not to exceed  an  aggregate  of One  Hundred  Thousand  Dollars
($100,000)) of T5's and the  Shareholders'  accountants,  attorneys,  investment
advisors and other  professionals  incurred in connection with the  negotiation,
preparation, execution and performance of this Agreement and the

                                      -26-
<PAGE>

Transaction  contemplated  thereby. Each of the parties shall be responsible for
its own income,  sales and use taxes. ISI shall pay the  Shareholders'  Expenses
which reduce the purchase price in the calculation of the Total Number of Shares
of ISI Common  Stock  pursuant to Section 2.1 of this  Agreement.  In  addition,
without  reducing the purchase  price,  ISI shall be responsible  for paying the
entire 2.5% of the GmbH stock transfer tax as well as fifty percent (50%) of the
notarial fees.

         10.3  NOTICES.  All  notices,  requests,  demands,  waivers  and  other
communications required or permitted to be given under this Agreement will be in
writing and will be deemed to have been duly given if  delivered  personally  or
mailed,  either by  certified  or  registered  mail with  postage  prepaid or by
national or international overnight courier, or sent by facsimile, as follows:

                  (a)      if to the Shareholders, to:

                           To  the  address  and  fax  number  specified  on the
signature page.

                  with a copy to:  Shareholders' Attorneys

                           Wilson, Sonsini, Goodrich & Rosati
                           650 Page Mill Road
                           Palo Alto, CA 94304
                           Facsimile:  (415) 496-4082
                           Attn:  Jeffrey Herbst, Esq.

                  (b)      if to T5, to:

                           TakeFive Software Gesellschaft m.b.H.
                           Jakob-Haringer-Strasse 8
                           5020 Salzburg, Austria
                           Facsimile: 43-662-4579156
                           Attn:  Christian Kleinferchner

         (a)      if to ISI, to:

                           Integrated Systems, Inc.
                           3260 Jay Street
                           Santa Clara, CA 95054
                           Facsimile:  (408) 986-9946
                           Attn:  Steven Sipowicz, Vice President of Finance and
                                  CFO

                  with a copy to:

                           Fenwick & West
                           Two Palo Alto Square
                           Palo Alto, CA  94306
                           Facsimile:  (415) 494-0674
                           Attention:  Fred Greguras, Esq.

or to such other  Person or address  as either  party will  specify by notice in
writing to the other party.  All such notices,  requests,  demands,  waivers and
communications will be deemed to have

                                      -27-
<PAGE>



been received (i) if given by personal delivery or by facsimile,  on the date of
personal  delivery or by facsimile , (ii) if by  nationally  or  internationally
recognized overnight courier, on the fourth business day following dispatch.

         10.4  ENTIRE  AGREEMENT.  This  Agreement  and the  Related  Agreements
(including  the Exhibits  hereto and thereto)  constitute  the entire  agreement
among the parties  hereto with respect to the subject  matter hereof and thereof
and supersede all prior agreements and understandings, oral and written, between
the parties hereto with respect to the subject matter hereof and thereof.

         10.5 BINDING EFFECT,  BENEFIT. This Agreement will inure to the benefit
of and be  binding  upon the  parties  hereto and their  respective  successors,
assigns,  executors  and  legal  representatives.  Nothing  in  this  Agreement,
expressed or implied, is intended to confer on any Person other than the parties
hereto  or their  respective  successors  and  assigns,  any  rights,  remedies,
obligations or liabilities under or by reason of this Agreement.

         10.6 ASSIGNABILITY. This Agreement will not be assigned by either party
hereto without the prior written consent of the other parties and any attempt to
do so will be void.

         10.7 SECTION HEADINGS. The Section headings contained in this Agreement
are  inserted  for  reference  purposes  only and will not affect the meaning or
interpretation of this Agreement.

         10.8   COUNTERPARTS.   This  Agreement  may  be  executed  in  multiple
counterparts,  each of which will be deemed to be an original,  and all of which
together will be deemed to be one and the same instrument.

         10.9 APPLICABLE LAW. This Agreement and the legal relations between the
parties hereto will be governed by and construed in accordance  with the laws of
the State of California  without regard to conflicts of laws principles  thereof
to the extent that such principles would apply the law of another jurisdiction.

         10.10  SEVERABILITY.  In case any provision of this  Agreement  will be
invalid,  illegal  or  unenforceable  in  any  jurisdiction,  then  as  to  such
jurisdiction  only,  such  provision  will to the extent of such  prohibition or
unenforceability  be deemed severed from the remainder of this Agreement and the
validity,  legality and  enforceability of the remaining  provisions will not in
any way be affected or impaired thereby.

         10.11 NO WAIVER.  No waiver of any breach or default  hereunder  of any
party  hereto  will be deemed a waiver  of any  default  or breach  subsequently
occurring.

         10.12  REMEDIES NOT  EXCLUSIVE.  Except as  otherwise  provided in this
Agreement,  no  remedy  conferred  by any of the  specific  provisions  of  this
Agreement  is intended to be  exclusive of any other remedy and each remedy will
be cumulative  and will be in addition to every other remedy given  hereunder or
now or  hereafter  existing at law or in equity or by statute or  otherwise.  No
remedy  will be deemed to be a  limitation  on the  amount or measure of damages
resulting  from any breach of this  Agreement.  The  election of any one or more
remedies  will not  constitute a waiver of the right to pursue  other  available
remedies.

         10.13 INTERPRETATION.  The words "include",  "includes" and "including"
when  used  herein  shall be deemed  in each  case to be  followed  by the words
"without limitation."

                                      -28-

<PAGE>



         10.14 RULES OF  CONSTRUCTION.  The parties  hereto agree that they have
been  represented  by  counsel  during the  negotiation  and  execution  of this
Agreement and, therefore, waive the application of any law, regulation,  holding
or rule of  construction  providing  that  ambiguities  in an agreement or other
document  will be  construed  against  the  party  drafting  such  agreement  or
document.

         10.15 ARBITRATION.  Except as specifically  provided in Section 6.11 of
this  Agreement  or  elsewhere  in  this  Agreement,  any  Contested  Claim  for
Indemnification   and  any  other  dispute  under  this   Agreement  or  Related
Agreements,  except for the Employment Agreements, shall be settled by mandatory
and binding arbitration pursuant to the arbitration provisions set forth below:

                  (a) Any  dispute  between  the  parties  shall be  settled  by
arbitration (i) in Santa Clara County, California if arbitration is requested by
T5 or the Shareholders,  and (ii) in Frankfurt,  Germany, if requested by ISI or
the ISI Austrian Subsidiary,  if applicable,  and, except as herein specifically
stated, in accordance with the commercial arbitration rules of the International
Chamber of Commerce ("ICC RULES") then in effect.  However,  in all events,  the
provisions of this Agreement shall govern over any  conflicting  rules which may
now or  hereafter be  contained  in the ICC Rules.  Any judgment  upon the award
rendered by the arbitrator may be entered in any court having  jurisdiction over
the subject matter thereof. The arbitrator shall have the authority to grant any
equitable and legal remedies that would be available in any judicial  proceeding
instituted to resolve a dispute between the parties.

                  (b) Any such  arbitration  will be  conducted  before a single
arbitrator  who  will be  compensated  for his or her  services  at a rate to be
determined  by the parties or by the ICC,  but based upon  reasonable  hourly or
daily  consulting rates for the arbitrator in the event the parties are not able
to agree upon his or her rate of compensation.

                  (c) The ICC will have the  authority  to select an  arbitrator
from a list of arbitrators  who are partners in a nationally  recognized firm of
independent  certified public accountants from the management  advisory services
department (or comparable department or group) of such firm or are partners in a
major law firm acceptable to all of the parties;  provided,  however,  that such
firm cannot be the firm of certified public  accountants then auditing the books
and records of either party or  providing  management  or advisory  services for
either party.

                  (d) The party initiating the arbitration  proceedings will pay
one  hundred  percent  (100%)  of the  initial  compensation  to be  paid to the
arbitrator  in any such  arbitration  and  fifty  percent  (50%) of the costs of
transcripts   and  other  normal  and  regular   expenses  of  the   arbitration
proceedings;  provided,  however,  that the prevailing  party in any arbitration
will be  entitled  to an award of  attorneys'  fees and costs,  and all costs of
arbitration,  including  those  provided  for above,  will be paid by the losing
party, and the arbitrator will be authorized to make such determinations.

                  (e)  Upon  the  conclusion  of  any  arbitration   proceedings
hereunder,  the arbitrator  will render  findings of fact and conclusions of law
and a written  opinion  setting  forth the basis and  reasons  for any  decision
reached and will  deliver such  documents  to the parties to the dispute,  along
with a signed copy of the award. The arbitrator  chosen in accordance with these
provisions will not have the power to alter, amend or otherwise affect the terms
of the  arbitration  provisions set forth herein or any other  provision of this
Agreement or any Related Agreement. Except as specifically otherwise provided in
this Agreement, arbitration will be the sole and exclusive remedy of the parties
for any  Contested  Claim for  Indemnification  arising out of Article IX or any
other

                                      -29-
<PAGE>



dispute  concerning  the  provisions or  performance of the Agreement or Related
Agreements.  The final  decision  of the  arbitrator  will be  furnished  to the
parties in writing and will constitute a conclusive  determination  of the issue
in question, binding upon such parties.

         10.16 ISI STOCK  OPTION PLAN.  The T5  employees  shall be eligible for
stock  options  under any ISI  stock  option  plans to the same  extent as other
similarly  situated  employees  of ISI and  subject to the same  conditions  and
requirements as are other employees of ISI.

         10.17  DISCLOSURE.  ISI, T5 and the Shareholders  agree not to make any
public announcement of this transaction without the approval of both ISI and T5,
such  approval  not to be  unreasonably  withheld.  Each  party  agrees  to take
reasonable  actions  to avoid any  trading  in ISI  securities  by such  party's
respective officers,  directors,  employees and agents until October 31, 1995 or
that  would be based on  material  nonpublic  information  that  relates  to the
proposed Transaction or that was learned in the due diligence process.

                                      -30-

<PAGE>



         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first above written.

TAKEFIVE SOFTWARE GESELLSCHAFT M.B.H.,    THE SHAREHOLDERS
AN AUSTRIAN CORPORATION
                                          Lavinia BV

By:___________________________________    By: __________________________________
   ___________________________________
Name:_________________________________    Name:_________________________________

Title:________________________________    Title:________________________________

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________


                                          Christian Kleinferchner

                                          ______________________________________
                                          as an individual and Trust Beneficiary

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________


                                          Christian Kleinferchner Privatstiftung

                                          By:___________________________________

                                          Its:__________________________________

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________


                                      -31-

<PAGE>


                                          ______________________________________
                                          Margarethe Kleinferchner

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________

                                          ______________________________________
                                          Peter Bucsi

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________

                                          ______________________________________
                                          Peterne Bucsi

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________

                                          ______________________________________
                                          Sandor Korosi

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________

                                          ______________________________________
                                          Baross Erika Korosine

                                          Address:______________________________

                                          ______________________________________

                                          Facsimile:____________________________

                  [SIGNATURE PAGE TO STOCK EXCHANGE AGREEMENT]

                                      -32-

<PAGE>




INTEGRATED SYSTEMS, INC.,
  A CALIFORNIA CORPORATION



By:___________________________________

Name:_________________________________

Title:________________________________







                  [SIGNATURE PAGE TO STOCK EXCHANGE AGREEMENT]


                                      -33-
<PAGE>


Exhibits

     A.   T5 Shareholders

     B.   Exceptions Letter

     C.   Austrian Registry Excerpt, Articles of Association and Bylaws of T5

     D.   Notarial Deed

     E.   List of All Agreements and Documents Provided in Due Diligence.

     F.   ISI Exceptions Letter

     G.   Affiliate Agreements

     H.   Noncompetition and Nonsolicitation Agreement

     I.   Employment Agreements

                                      -34-


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