DATATEC SYSTEMS INC
8-K, 1998-03-20
COMPUTER INTEGRATED SYSTEMS DESIGN
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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): March 9, 1998
                                                  -------------

                              Datatec Systems, Inc.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


     Delaware                     0-20688          94-2914253
- --------------------------------------------------------------------------------
(State or other jurisdiction   (Commission       (IRS Employer
     of incorporation)         File Number)   Identification No.)


                   20C Commerce Way, Totowa, New Jersey 07512
- --------------------------------------------------------------------------------
                    (Address of principal executive offices)


Registrant's telephone number, including area code: (973) 890-4800


                                       N/A
- --------------------------------------------------------------------------------
         (Former name or former address, if changed since last report.)



<PAGE>
         ITEM 5.           OTHER EVENTS.

         On March 9, 1998 the Registrant entered into a Stock Purchase Agreement
(the "Stock Purchase Agreement") with David H. Tobey and Computer-Aided Software
Integration,  Inc.  ("CASI").  Pursuant  to  the  terms  of the  Stock  Purchase
Agreement,  the  Registrant  purchased  the  remaining 20% interest in CASI from
David  Tobey  for an  aggregate  purchase  price  of  $2,255,247.  Prior  to the
consummation of this  transaction,  the Registrant  owned 80% of the outstanding
capital stock of CASI.

                  For  additional   information   concerning  the   transaction,
reference is made to the news release and the Stock  Purchase  Agreement,  which
are  incorporated  herein by reference and are attached  hereto as Exhibits 99.1
and 99.2, respectively.


ITEM 7.           FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
                  EXHIBITS

         (c)  Exhibits:

         99.1              News Release of Datatec Systems, Inc. dated March 10,
                           1998.

         99.2              Stock Purchase  Agreement  dated March 9, 1998 by and
                           among  David H.  Tobey,  Datatec  Systems,  Inc.  and
                           Computer-Aided  Software  Integration,   Inc.,  which
                           includes the form of Convertible  Promissory  Note as
                           Exhibit A, the form of Registration  Rights Agreement
                           as  Exhibit  B,  and  the  form  of   Non-Competition
                           Agreement as Exhibit C.


                                       -2-

<PAGE>
                                   SIGNATURES

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


                                           DATATEC SYSTEMS, INC.


                                           By: /s/ James Caci
                                               ----------------------
                                              James Caci
                                              Chief Financial Officer


DATE:  March 19, 1998


                                       -3-

<PAGE>
EXHIBIT INDEX                                                       PAGE NO.

99.1                         News Release of Datatec Systems, Inc.       5
                             dated March 10, 1998.

99.2                         Stock Purchase Agreement dated March 9,     6
                             1998 by and among David H. Tobey,
                             Datatec Systems, Inc. and Computer-
                             Aided Software Integration, Inc.





                                       -4-




                                                           FOR IMMEDIATE RELEASE

            DATATEC SYSTEMS ACQUIRES REMAINING 20% OF COMPUTER-AIDED
                           SOFTWARE INTEGRATION, INC.

            COMPANY GAINS FULL AUTONOMY IN THE DEVELOPMENT AND USE OF
                          PROPRIETARY IWPS(TM) SOFTWARE


         TOTOWA,  NJ,  March 10, 1998 - Datatec  Systems,  Inc.  (Nasdaq:  DATC;
formerly Glasgal Communications, Inc. Nasdaq: GLAS), a national rapid deployment
company,  today  announced it acquired the  remaining  shares of  Computer-Aided
Software  Integration,  Inc. (CASI) for approximately $2.4 million.  The Company
had previously acquired 80% of CASI in April 1996. Datatec now has full autonomy
over  the  development  and  use  of  CASI's   proprietary   software  tools  --
Integrator's Workbench Product Series(TM) (IWPS(TM)). The software automates the
desIGN,  implementation,   migration  and  support  of  client/server  computing
environments.

         "By acquiring the remaining 20% of CASI, we have  positioned  ourselves
to realize the full benefits of all future revenues and profits derived from the
IWPS(TM)  software," stated Isaac Gaon,  Chairman and Chief Executive Officer of
Datatec Systems, Inc. "Additionally,  we now control its technological direction
which we felt was a strategic importance given our increasing utilization of and
reliance upon IWPS(TM) to provided  customers with a virtually error free, rapid
implementation of new complex technologies."

         Datatec  Systems,  Inc.  specializes in the rapid deployment of network
and computing  technologies  for Fortune 1000 companies,  systems  manufactures,
system  integrators  and  independent   software  vendors.   Datatec's  team  of
professionals  in 18 offices and five staging and  configuration  centers across
the United  States and Canada,  utilize  proprietary  software  tools and proven
methodologies to drastically  reduce  configuration and deployment time. Through
accelerated IT  implementation,  Datatec helps their customers  improve business
performance and return and investment.


                            STOCK PURCHASE AGREEMENT



                                  By and Among




                                 David H. Tobey,



                              Datatec Systems, Inc.



                                       and



                    Computer-Aided Software Integration, Inc.










- --------------------------------------------------------------------------------

                            Dated as of March 9, 1998

- --------------------------------------------------------------------------------


<PAGE>
                            STOCK PURCHASE AGREEMENT


                  STOCK PURCHASE AGREEMENT (the "Agreement"),  dated as of March
9, 1998, by and between David H. Tobey (the "Seller"),  Datatec Systems, Inc., a
Delaware  corporation  (the "Buyer") and  Computer-Aided  Software  Integration,
Inc., a Delaware corporation ("CASI").

                              W I T N E S S E T H:

                  WHEREAS,  the Seller owns 200 shares (the  "Shares") of common
stock ("Common Stock"), par value $.01 per share, of CASI; and

                  WHEREAS, the Buyer desires to purchase, and the Seller desires
to sell the Shares; and

                  WHEREAS,  for  accounting  purposes  it is  intended  that the
transactions   contemplated   hereby  shall  be  accounted  for  as  a  purchase
transaction under United States generally accepted accounting  principles ("U.S.
GAAP");

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
representations,   warranties,   and  mutual  covenants  and  agreements  herein
contained, the parties hereby agree as follows:

                                    ARTICLE I

                                 SALE OF SHARES

                  Section 1.1  DELIVERY  OF SHARES.  On the terms and subject to
the conditions of this Agreement,  on the Closing Date (as defined  below),  the
Buyer  shall  purchase  the Shares  from the  Seller for an amount  equal to the
Purchase  Price (as defined  below) and the Seller  shall sell the Shares to the
Buyer. On the Closing Date, the Seller will transfer, assign, convey and deliver
to the Buyer a certificate or certificates  representing all of the Shares. Each
of the  certificates  shall be duly  endorsed  for  transfer or  accompanied  by
appropriate  stock powers duly  executed,  in either case in favor of the Buyer,
and each certificate  shall have any and all necessary stock transfer tax stamps
affixed thereto at the Seller's expense.

                  Section 1.2 PURCHASE  CONSIDERATION.  The  aggregate  purchase
price for the Shares (the "Purchase Price") shall be $2,255,247.  At the Closing
(as defined below),  Buyer shall deliver to Seller (i) $422,500 by wire transfer
of immediately  available funds to an account designated by the Seller; and (ii)
a convertible  promissory  note,  substantially  in the form attached  hereto as
Exhibit A (the "Note"),  in the aggregate principal amount of $1,832,747 bearing
interest at a rate of 10% per annum,


<PAGE>
interest  payable  monthly  and  maturing  on the  earlier  to  occur of (i) the
realization  by the Buyer of net proceeds of $3 million or more from the sale of
equity securities, or (ii) June 15, 1998.

                                   ARTICLE II

                                     CLOSING

                  The closing (the "Closing") of the  transactions  contemplated
by this Agreement shall take place as soon as practicable after  satisfaction or
waiver of all  conditions  set forth  herein at the  offices of Olshan  Grundman
Frome & Rosenzweig  LLP, 505 Park Avenue,  New York, New York 10022,  or at such
other time and place as the Buyer and the Seller  shall agree (the date on which
such closing occurs being herein referred to as the "Closing Date").


                                   ARTICLE III

                  REPRESENTATIONS AND WARRANTIES OF THE SELLER

                  The Seller  hereby  represents  and  warrants  to the Buyer as
follows:

                  Section 3.1  CAPITALIZATION.  The Seller owns the Shares, free
and clear of all liens,  claims or  encumbrances,  other than the  Stockholders'
Agreement (as such term is defined in Section 10.3).  The Seller has full right,
power,  legal capacity and authority to transfer and deliver the Shares pursuant
to this Agreement. The Seller has not committed CASI or attempted to commit CASI
to issue any shares of capital  stock of CASI or rights to acquire any shares of
capital  stock of CASI,  other than options to purchase  50,000 shares of Common
Stock of CASI granted to Peter Westphal.

                  Section  3.2  TRADEMARKS,  PATENTS  AND  COPYRIGHTS.  (a)  For
purposes of this  Agreement,  the term "CASI  Rights"  shall mean all  worldwide
industrial and intellectual property rights, including, without limitation, each
patent, patent right, license, patent application,  trade name, trademark, trade
name and trademark registration,  copyright,  copyright registration,  copyright
application,  service mark, brand mark and brand name, trade secrets relating to
or arising from any proprietary process,  formula,  source or object code, owned
or possessed by CASI.

                  (b)      Seller does not claim an ownership interest in any
CASI Rights.



                                       -2-

<PAGE>
                  Section 3.3 NO CONFLICTS;  ABSENCE OF DEFAULTS. The execution,
delivery and  performance  of this Agreement by the Seller does not and will not
conflict with or violate any  agreement  governing the affairs of the Seller or,
in any material respect,  any agreement or instrument to which the Seller may be
a party or by which the Seller is bound,  or any  material  law,  administrative
regulation or rule or court order,  judgment or decree applicable to the Seller;
nor will the execution and delivery of this Agreement or the consummation of the
transaction contemplated hereby constitute a material breach of, or any event of
default under, any material  contract or agreement to which the Seller is bound,
or by which the Seller may be bound or  affected,  other than the  Stockholders'
Agreement (as such term is defined in Section 10.3).

                                   ARTICLE IV

                   REPRESENTATIONS AND WARRANTIES OF THE BUYER

                  The Buyer  hereby  represents  and  warrants  to the Seller as
follows:

                  Section 4.1  CORPORATE  ORGANIZATION;  REQUISITE  AUTHORITY TO
CONDUCT  BUSINESS.  The Buyer is a corporation duly organized,  validly existing
and in good  standing  under  the  laws of the  State of  Delaware  and has full
corporate  power and  authority  to enter into this  Agreement,  to perform  its
obligations hereunder and to consummate the transactions contemplated hereby and
this Agreement has been duly  authorized and approved by all required  corporate
action of the Buyer.

                  Section 4.2 EXECUTION AND  DELIVERY.  This  Agreement has been
duly  executed and  delivered by the Buyer and  constitutes  a legal,  valid and
binding  obligation  of the Buyer,  enforceable  against the Buyer in accordance
with its terms,  except (i) as such  enforceability may be limited by or subject
to any bankruptcy, insolvency, reorganization,  moratorium or other similar laws
affecting  creditors' rights generally,  (ii) as such obligations are subject to
general  principles of equity and (iii) as rights to indemnity may be limited by
federal or state securities laws or by public policy.

                  Section 4.3 NO CONFLICTS;  ABSENCE OF DEFAULTS. The execution,
delivery and  performance  of this  Agreement by the Buyer does not and will not
conflict with or violate any agreement  governing the organization,  management,
business or affairs of the Buyer or, in any material  respect,  any agreement or
instrument to which the Buyer may be a party or by which the Buyer is bound,  or
any material law, administrative  regulation or rule or court order, judgment or
decree  applicable  to the Buyer;  nor will the  execution  and delivery of this
Agreement or the consummation of the transaction  contemplated hereby constitute
a

                                       -3-

<PAGE>
material  breach of, or any event of default  under,  any  material  contract or
agreement  to which the  Buyer is  bound,  or by which the Buyer may be bound or
affected,  other than the  Stockholders'  Agreement  (as such term is defined in
Section 10.3).

                  Section  4.4  INVESTMENT;   SECURITIES   LAWS.  The  Buyer  is
acquiring the Shares solely for its own account as an investment  and not with a
view to any  distribution  or resale  thereof  within the meanings of such terms
under the  Securities  Act of 1933,  as  amended.  The Buyer will not effect any
disposition  of the Shares in  violation of any Federal or state  securities  or
similar laws or in a manner which  subjects it or any of its  affiliates  to any
liability or sanction under any such securities or similar laws.

                  Section 4.5 RESERVATION OF SHARES.  The Buyer has reserved for
issuance  700,000  shares of its common  stock,  par value $.001 per share,  for
issuance upon  conversion of the Note.  When issued in accordance with the terms
of the Note,  such  shares  of common  stock  will be duly  authorized,  validly
issued, fully paid and non-assessable.

                                    ARTICLE V

                      COVENANTS OF THE SELLER AND THE BUYER


                  Section 5.1 BEST  EFFORTS.  Seller and Buyer each covenant and
agree to  proceed  diligently  and use its best  efforts  to take or cause to be
taken all actions and to do or cause to be done all things necessary, proper and
advisable to consummate the transactions contemplated by this Agreement.

                  Section 5.2  COMPLIANCE.  Seller and Buyer each  covenant  and
agree  to  comply  in all  material  respects  with  all  applicable  rules  and
regulations  of any  Governmental  Authority in connection  with the  execution,
delivery and  performance  of this Agreement and the  transactions  contemplated
hereby; to use all reasonable efforts to obtain in a timely manner all necessary
waivers,  consents and approvals  and to take,  or cause to be taken,  all other
actions and to do, or cause to be done,  all other things  necessary,  proper or
advisable  to  consummate  and make  effective  as promptly as  practicable  the
transactions contemplated by this Agreement.

                  Section 5.3 NOTICE.  Seller and Buyer each  covenant and agree
to give prompt  notice to the other party of (i) the  occurrence,  or failure to
occur,  of any event whose  occurrence  or failure to occur,  would be likely to
cause any representation or warranty contained in this Agreement to be untrue or
incorrect  in any  material  respect  at any time  from the date  hereof  to the
Closing Date and (ii) any material failure on its part, or on the part of any of
its officers, directors, employees or agents, to

                                       -4-

<PAGE>
comply with or satisfy any covenant,  condition or agreement to be complied with
or satisfied by it hereunder;  provided,  however, that the delivery of any such
notice shall not limit or otherwise affect the remedies  available  hereunder to
the party receiving such notice.

                  Section 5.4  CONFIDENTIALITY.  Seller and Buyer each  covenant
and agree to hold in strict  confidence all data and  information  obtained from
the other party hereto or any subsidiary,  division, associate,  representative,
agent or affiliate of any such party  (unless such  information  (i) is lawfully
obtained from a third party that is not under an obligation not to disclose such
information,  (ii) is independently developed by such party, (iii) is or becomes
publicly  available  without the fault of any  representative  of such party, or
(iv) public  disclosure of such information is required by law in the opinion of
counsel to such party) and shall not disclose such information to others without
the prior  written  consent of the other party  hereto,  and in the event of the
termination of this Agreement,  to cause its  representatives to return promptly
every document furnished by the other party hereto or any subsidiary,  division,
associate,  representative,  agent or affiliate of any such party in  connection
with the transactions  contemplated hereby and any copies thereof which may have
been made, other than documents which are publicly available.

                  Section 5.5 CONTINUING OBLIGATION. CASI and Buyer, jointly and
severally,  shall indemnify the Seller,  to the fullest extent  permitted by the
Delaware General  Corporation Law, from and against any loss,  claim,  liability
and/or  expense  incurred  for,  or by reason of, or arising out of, acts of the
Seller as an officer and/or  director of Buyer,  CASI or any affiliates of Buyer
or CASI.  Any  costs,  fees or  expenses  incurred  by Seller  relating  to such
indemnification shall be paid by CASI or Buyer in advance as soon as practicable
but not later than three  business days after receipt of the written  request of
Seller;  provided that the Seller shall (i) affirm in such written  request that
he acted in good faith and in a manner  which he  reasonably  believed to be (in
the case of conduct  in his  official  capacity)  in the best  interests  of the
company or (in all other cases) not opposed to the best interests of the company
and (ii)  undertake  to repay  such  amount  to the  extent  that is  ultimately
determined by a court of competent  jurisdiction  that Seller is not entitled to
indemnification.  The Seller's right to indemnification or advances from CASI or
Buyer shall be enforceable by Seller in any court of competent jurisdiction. The
burden of providing that  indemnification  or advances are not appropriate shall
be on CASI and Buyer.


                                       -5-

<PAGE>
                  Section 5.6 CONVEYANCE OF LAPTOP COMPUTER. Subject to Sections
3.2(b) and 5.4  hereof,  at the  Closing,  Buyer  shall  cause CASI to convey to
Seller all of CASI's  right,  title and interest in and to the laptop  computer,
all software loaded thereon,  to the extent  permitted,  and the printer used by
Seller during his employment with CASI.

                  Section 5.7  RELEASES.  Other than for  obligations  which may
exist or arise by  reason  of this  Agreement,  the  Note,  the  Non-Competition
Agreement referred to in Section 7.8 hereof, the Pledge Agreement referred to in
the Note,  or the  Registration  Rights  Agreement  referred  to in Section  6.8
hereof,   Seller,  for  himself  and  his  heirs,   executors,   administrators,
successors,   and  assigns  hereby  irrevocably  and  unconditionally  releases,
acquits, and forever discharges Buyer, CASI, and all of their present and former
stockholders, partners, officers, directors, employees, agents, representatives,
attorneys, successors and assigns ("Buyer Releasees"), from any and all charges,
complaints,    claims,   liabilities,    obligations,    promises,   agreements,
controversies,  damages,  actions,  causes of action,  suits,  rights,  demands,
costs, losses, debts and expenses (including  attorney's fees and costs actually
incurred),  of any nature whatsoever,  whether asserted,  known or unknown which
Seller may have,  own,  hold,  or claim to have, or hold, or which Seller at any
time heretofore  had, owned,  held, or claimed to have, own, or hold against any
of the Buyer Releasees.

                  Other than for obligations  which may exist or arise by reason
of this  Agreement,  the Note,  the  Non-Competition  Agreement  referred  to in
Section  7.8  hereof,  the  Pledge  Agreement  referred  to in the Note,  or the
Registration Rights Agreement referred to in Section 6.8 hereof,  Buyer and CASI
hereby irrevocably and  unconditionally  release,  acquit, and forever discharge
Seller from any and all charges, complaints,  claims, liabilities,  obligations,
promises, agreements,  controversies, damages, actions, causes of action, suits,
rights,  demands,  costs, losses, debts and expenses (including  attorney's fees
and costs actually incurred), of any nature whatsoever,  whether asserted, known
or unknown which Buyer or CASI may have,  own,  hold, or claim to have, or hold,
or which Buyer or CASI at any time  heretofore  had owned,  held,  or claimed to
have, own, or hold against Seller.

                                   ARTICLE VI


                CONDITIONS PRECEDENT TO OBLIGATIONS OF THE SELLER

                  The obligations of the Seller under this Agreement are subject
to the satisfaction,  on or prior to the Closing Date, unless waived in writing,
of each of the following conditions:


                                       -6-

<PAGE>
                  Section  6.1   REPRESENTATIONS   AND   WARRANTIES   TRUE.  The
representations and warranties of the Buyer contained in this Agreement shall be
true and correct in all material respects as of the date when made and at and as
of the Closing Date,  except as and to the extent that the facts and  conditions
upon which such  representations and warranties are based are expressly required
or permitted to be changed by the terms  hereof,  with the same force and effect
as if made on and as of the  Closing  Date,  and  CASI  shall  have  received  a
certificate  to that  effect  and as to the  matters  set forth in  Section  6.2
hereof, dated the Closing Date, from the President or Chief Executive Officer of
the Buyer.

                  Section 6.2  PERFORMANCE  OF  COVENANTS.  The Buyer shall have
performed or complied in all material  respects with all agreements,  conditions
and covenants  required by this Agreement to be performed or complied with by it
on or before the Closing Date.

                  Section  6.3  NO  PROCEEDINGS.  No  preliminary  or  permanent
injunction  or other  order  (including  a temporary  restraining  order) of any
state,  federal or local  court or other  governmental  agency or of any foreign
jurisdiction  which prohibits the consummation of the transactions which are the
subject of this Agreement or prohibits the Buyer's ownership of the Shares shall
have been issued or entered and remain in effect.

                  Section  6.4   CONSENTS   AND   APPROVALS.   All  filings  and
registrations with, and notifications to, all federal,  state, local and foreign
authorities   required  by  the  Buyer  for  consummation  of  the  transactions
contemplated  by this  Agreement  shall  have  been made by the  Buyer,  and all
consents,  approvals and authorizations of all federal, state, local and foreign
authorities  and  parties  to  material  contracts,   licenses,   agreements  or
instruments  with  the  Buyer  required  for  consummation  of the  transactions
contemplated  by this  Agreement  shall have been  received and shall be in full
force and effect  other than those  instances  in which  failure to obtain  such
consents,  approvals or authorizations  would not, either individually or in the
aggregate,  have a  material  adverse  effect  on the  business,  operations  or
condition (financial or otherwise) of the Buyer.

                  Section 6.5 NOTE AND PLEDGE AGREEMENT. The Note and the Pledge
Agreement shall have been executed and delivered.

                  Section 6.6  AGREEMENT  NOT TO COMPETE.  The Seller shall have
received  $77,500 by wire transfer of immediately  available funds to an account
designated  by the Seller as  consideration  for the  Non-Competition  Agreement
referred to in Section 7.8.


                                       -7-

<PAGE>
                  Section 6.7 FEES AND EXPENSES. The Buyer shall have reimbursed
the Seller for his fees and expenses as provided in Section 10.1.  Further,  the
Buyer shall have caused CASI to  reimburse  the Seller for all amounts due under
the Employment  Agreement (as such term is defined in Section 10.4),  including,
without  limitation,  all  accrued  and unpaid  salary and  outstanding  expense
reimbursements.

                  Section 6.8 REGISTRATION  RIGHTS  AGREEMENT.  The Registration
Rights  Agreement  between  Buyer and  Seller,  in the form of Exhibit B hereto,
shall have been executed and delivered.


                                   ARTICLE VII

                CONDITIONS PRECEDENT TO OBLIGATIONS OF THE BUYER

                  The  obligations of the Buyer under this Agreement are subject
to the satisfaction,  on or prior to the Closing Date, unless waived in writing,
of each of the following conditions:

                  Section  7.1   REPRESENTATION   AND   WARRANTIES   TRUE.   The
representations  and warranties of the Seller  contained in this Agreement shall
be true and correct in all material respects as of the date when made and at and
as of the  Closing  Date,  except  as  and to the  extent  that  the  facts  and
conditions  upon  which  such  representations  and  warranties  are  based  are
expressly  required or permitted to be changed by the terms hereof with the same
force and effect as if made on and as of the Closing  Date,  and the Buyer shall
have  received a  certificate  to that effect and as to the matters set forth in
Section 7.2 hereof, dated the Closing Date, from the Seller.

                  Section 7.2  PERFORMANCE  OF COVENANTS.  The Seller shall have
performed or complied in all material  respects with all agreements,  conditions
and covenants required by this Agreement to be performed or complied with by him
on or before the Closing Date.

                  Section  7.3  NO  PROCEEDINGS.  No  preliminary  or  permanent
injunction  or other  order  (including  a temporary  restraining  order) of any
state,  federal or local  court or other  governmental  agency or of any foreign
jurisdiction  which prohibits the consummation of the transactions which are the
subject of this  Agreement or prohibits  the Buyer's  ownership of the Shares or
operation  of CASI's  business  shall have been  issued or entered and remain in
effect.

                  Section 7.4  TERMINATION  OF WESTPHAL  OPTION.  All options to
purchase Common Stock granted by CASI to Peter Westphal and CASI shall have been
terminated.


                                       -8-

<PAGE>
                  Section 7.6 BANK WAIVER. Buyer shall have received the consent
of Finova Capital  Corporation  ("Finova") to the  transactions  contemplated by
this Agreement.

                  Section 7.8  AGREEMENT  NOT TO COMPETE.  The Non-  Competition
Agreement  between CASI and the Seller,  substantially  in the form of Exhibit C
hereto, shall have been executed and delivered.


                                  ARTICLE VIII

                                 INDEMNIFICATION

                  Section  8.1  INDEMNIFICATION  BY THE  SELLER.  Subject to the
limits set forth in this Article VIII,  the Seller  agrees to indemnify,  defend
and hold the  Buyer  harmless  from and  against  any and all  loss,  liability,
damage, costs and expenses (including  interest,  penalties and attorneys' fees)
that the Buyer or any of its  affiliates  may incur or become subject to arising
out of or due to any  inaccuracy  of any  representation  or the  breach  of any
warranty,  covenant,  undertaking or other agreement of the Seller  contained in
this Agreement.

                  Section  8.2  INDEMNIFICATION  BY THE  BUYER.  Subject  to the
limits set forth in this Article VIII, the Buyer agrees to indemnify, defend and
hold the Seller harmless from and against any and all loss,  liability,  damage,
costs and expenses  (including  interest,  penalties and  reasonable  attorneys'
fees) that the Seller or its  affiliates  may incur or become subject to arising
out of or due to any  inaccuracy  of any  representation  or the  breach  of any
warranty,  covenant,  undertaking or other  agreement of the Buyer  contained in
this Agreement.

                  Section  8.3  SURVIVAL.  The  representations  and  warranties
contained in this  Agreement  shall  survive the Closing Date and remain in full
force and effect for one year. The agreements  contained in this Agreement shall
survive the Closing Date pursuant to their terms.

                  Section  8.4  LIMITATIONS.  Except as  otherwise  specifically
provided in this  Agreement,  no party shall assert any claim  against the other
for  indemnification  hereunder with respect to any inaccuracy or breach of such
warranties, representations, covenants or agreements unless and until the amount
of all such claims shall exceed $50,000.  In no event shall Seller be liable for
claims exceeding $2,255,247 in the aggregate.

                  Section  8.5 THIRD  PARTY  CLAIMS.  In order for a party  (the
"indemnified  party") to be entitled to any  indemnification  provided for under
this Agreement in respect of, arising out of,

                                       -9-

<PAGE>
or involving a claim or demand or written notice made by any third party against
the  indemnified  party (a "Third Party  Claim")  after the Closing  Date,  such
indemnified party must notify the indemnifying party (the "indemnifying  party")
in writing of the Third Party Claim  within 30  business  days after  receipt by
such indemnified party of written notice of the Third Party Claim; provided that
the failure of any indemnified  party to give timely notice shall not affect his
right of  indemnification  hereunder except to the extent the indemnifying party
has actually been prejudiced or damaged thereby.  If a Third Party Claim is made
against an indemnified party, the indemnifying party shall be entitled, if it so
chooses, to assume the defense thereof with counsel selected by the indemnifying
party (which counsel shall be reasonably satisfactory to the indemnified party).
If the  indemnifying  party  assumes  the defense of a Third  Party  Claim,  the
indemnified   party  will  cooperate  in  all   reasonable   respects  with  the
indemnifying party in connection with such defense,  and shall have the right to
participate  in  such  defense  with  counsel  selected  by  it.  The  fees  and
disbursements  of  such  counsel,  however,  shall  be at  the  expense  of  the
indemnified party; provided, however, that, in the case of any Third Party Claim
of which the indemnifying  party has not employed counsel to assume the defense,
the fees and  disbursements  of such  counsel  shall  be at the  expense  of the
indemnifying person.

                  Section 8.6 REDUCTION FOR INSURANCE. The gross amount which an
indemnifying party is liable to, for, or on behalf of the Indemnitee pursuant to
this  Article  VIII (the  "Indemnifiable  Loss")  shall be  reduced  (including,
without limitation,  retroactively) by any insurance proceeds actually recovered
by or on behalf of such indemnified party related to the Indemnifiable  Loss. If
an indemnified party shall have received or shall have had paid on its behalf an
indemnity  payment in respect of an  Indemnifiable  Loss and shall  subsequently
receive   directly  or  indirectly   insurance   proceeds  in  respect  of  such
Indemnifiable  Loss, then such Indemnitee shall pay to such  Indemnifying  Party
the net  amount  of such  insurance  proceeds  or, if less,  the  amount of such
indemnity  payment.  Notwithstanding  the foregoing,  an indemnified party shall
have no obligation to seek insurance proceeds.

                                   ARTICLE IX

                        TERMINATION, AMENDMENT AND WAIVER

                  Section 9.1 TERMINATION.  This Agreement may be terminated and
the transactions  contemplated by this Agreement  abandoned at any time prior to
the Closing:

                  (a) By mutual written consent of the Buyer and the Seller;


                                      -10-

<PAGE>
                  (b) By  either  the Buyer or the  Seller  if the  transactions
contemplated  by this  Agreement  shall not have been  consummated  on or before
March 10, 1998;

                  (c) By the  Seller if any  condition  specified  in Article VI
hereto has not been met or waived by the  Seller at such time as such  condition
can no longer be satisfied; or

                  (d) By the Buyer if any  condition  specified  in Article  VII
hereto  has not been met or waived  by the Buyer at such time as such  condition
can no longer be satisfied; or

                  (e) By either the Buyer or the Seller if a court of  competent
jurisdiction or Governmental Authority shall have issued a final, non-appealable
order, decree or ruling or taken any other action (which order, decree or ruling
the  parties  hereto  shall  use  their  best  efforts  to  lift),  in each case
permanently  restraining,  enjoining or otherwise  prohibiting the  transactions
contemplated by this Agreement.

                  Section 9.2 EFFECT OF TERMINATION.  Except as may be expressly
provided herein, in the event of any termination of this Agreement in accordance
with Section 9.1 hereof,  this Agreement shall  forthwith  become void and there
shall be no  liability  under this  Agreement on the part of any party hereto or
their respective affiliates,  officers, directors, employees or agents by virtue
of such termination.

                  Section 9.3  AMENDMENT.  This  Agreement may be amended by the
written agreement of the Buyer and the Seller.

                                    ARTICLE X

                                  MISCELLANEOUS

                  Section 10.1  EXPENSES.  All parties  agree to save each other
harmless  against claims for brokerage fees and  commissions (of which there are
none). All costs and expenses incurred in connection with this Agreement and the
transactions contemplated hereby shall be paid by the party incurring such costs
and expenses  regardless of the  termination of this Agreement or the failure to
consummate the transactions  contemplated hereby, provided,  however, that Buyer
agrees to reimburse  Seller for up to $25,000 of Seller's  reasonable legal fees
in  connection  with the  transactions  contemplated  hereby,  regardless of the
termination of this Agreement.

                  Section 10.2 NOTICES. All notices, requests, demands and other
communications  which are required or may be given under this Agreement shall be
in writing and shall be deemed to have been duly given when delivered personally
or by facsimile transmission, in either case with receipt acknowledged, or three

                                      -11-

<PAGE>
days after being sent by registered or certified mail, return receipt requested,
postage prepaid:


                  (a) If to the Buyer to:

                           Datatec Systems, Inc.
                           20 Commerce Way
                           Totowa, NJ 07512
                           Attention: Chief Executive Officer

                           with a copy to:

                           Olshan Grundman Frome & Rosenzweig LLP
                           505 Park Avenue
                           New York, New York 10022
                           Attention:  Robert H. Friedman, Esq.

                  (b) If to the Seller to:

                           David Tobey
                           1545 Shadowtree Court
                           Colorado Springs, Colorado 80921

                           with a copy to:

                           Tucker, Flyer & Lewis
                           1615 L Street, Suite 400
                           Washington, D.C. 20036
                           Attention:  Lawrence Yanowitch, Esq.


or to such other address as any party shall have  specified by notice in writing
to the other in compliance with this Section 10.2.

                  Section  10.3  SUSPENSION  AND  TERMINATION  OF  STOCKHOLDERS'
AGREEMENT. Except with respect to Sections 2.2(a) and (b), 2.3, and 5.3 thereof,
the  obligations  of Buyer  and CASI  under  the  Stockholders'  Agreement  (the
"Stockholders'  Agreement")  dated as of April 24, 1996 by and among CASI, Buyer
and Seller shall,  pursuant to this Section 10.3, be suspended  concurrent  with
the Closing until such time as the Seller  exercises his rights in the Shares in
accordance with the Note and the Pledge Agreement.  Notwithstanding  Section 2.5
of the Stockholders'  Agreement and Seller's sale of the Shares pursuant to this
Agreement,  for  purposes of the  non-suspended  sections  of the  Stockholders'
Agreement,  Seller shall be deemed to be a Stockholder.  Notwithstanding Section
2.3 of the  Stockholders'  Agreement,  and  subject to Seller's  first  priority
security  interest in the Shares pursuant to the terms of the Pledge  Agreement,
Buyer may pledge to Finova (i) the shares of Common

                                      -12-

<PAGE>
Stock owned by Buyer and (ii) assets of CASI.  After the earlier to occur of (i)
repayment in full of the Note,  and (ii) any  conversion of the Note into shares
of  common  stock  of  Buyer  pursuant  to the  terms of the  Note,  the  entire
Stockholders'  Agreement shall immediately  terminate and shall be of no further
effect.

                  Section  10.4   SUSPENSION   AND   TERMINATION  OF  EMPLOYMENT
AGREEMENT. The obligations of Buyer and CASI under the Employment Agreement (the
"Employment  Agreement")  dated as of April 24, 1996 by and between CASI, Seller
and Buyer shall, pursuant to this Section 10.4, be suspended concurrent with the
Closing  until  such time as the  Seller  exercises  his rights in the Shares in
accordance  with the Note and the Pledge  Agreement.  Upon the resumption of the
obligations under the Employment Agreement,  (i) the base compensation set forth
in Section 4(a) of the Employment Agreement and other benefits to be provided to
Seller  thereunder  shall  be  reinstated  for the  duration  of the term of the
Employment Agreement,  and (ii) the incentive  compensation set forth in Section
4(b)  of  the  Employment  Agreement  shall  be  reinstated  as if  the  Buyer's
obligation  thereunder  was never  suspended.  After the earlier to occur of (i)
repayment in full of the Note,  and (ii) any  conversion of the Note into shares
of common  stock of Buyer  pursuant  to the terms of the  Note,  the  Employment
Agreement shall immediately terminate without any further obligation on the part
of CASI or Buyer.

                  Section 10.5 ENTIRE AGREEMENT.  This Agreement constitutes the
entire  agreement  among the parties  hereto with respect to the subject  matter
hereof and thereof and  supersedes  all prior  agreements,  representations  and
understandings among the parties hereto.

                  Section  10.6  BINDING  EFFECT,  BENEFITS,  ASSIGNMENTS.  This
Agreement  shall inure to the benefit of and be binding upon the parties  hereto
and  their  respective  successors  and  assigns;  nothing  in  this  Agreement,
expressed or implied, is intended to confer on any other 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.  This Agreement
may not be  assigned  without  the prior  written  consent of the other  parties
hereto.

                  Section 10.7  APPLICABLE  LAW.  This  Agreement  and the legal
relations  between the parties  hereto  shall be  governed by and  construed  in
accordance  with the laws of the State of New York without  regard to principles
of conflicts of law.

                  Section 10.8 JURISDICTION.  The parties hereto agree to submit
to the  jurisdiction  of any Federal or state court  located in the State of New
York for the  purpose  of  resolving  any  action  or claim  arising  out of the
performance of the provisions of this Agreement.

                                      -13-

<PAGE>
                  Section  10.9  HEADINGS.  The  headings  and  captions in this
Agreement are included for purposes of convenience only and shall not affect the
construction or interpretation of any of its provisions.

                  Section  10.10  COUNTERPARTS.  This  Agreement may be executed
simultaneously  in two or more  counterparts,  each of which  shall be deemed an
original,  but  all  of  which  together  shall  constitute  one  and  the  same
instrument.


                                      -14-

<PAGE>
                  IN WITNESS  WHEREOF,  the parties  hereto have  executed  this
Agreement as of the day and year hereinabove first set forth.


                                           DATATEC SYSTEMS, INC.


                                           By:/s/ James M. Caci
                                              ------------------------------
                                              Name: James M. Caci
                                              Title: CFO


                                             /s/ David H. Tobey
                                           ---------------------------------
                                           David H. Tobey


                                           COMPUTER-AIDED SOFTWARE
                                           INTEGRATION, INC.
                                           (as to Sections 5.5, 10.3 and 10.4
                                           only)


                                           By: /s/ James M. Caci
                                              ---------------------------------
                                              Name: James M. Caci
                                              Title:  CFO


                                      -15-

<PAGE>
                                                                       EXHIBIT A

THIS NOTE HAS NOT BEEN  REGISTERED  UNDER THE UNITED  STATES  SECURITIES  ACT OF
1933, AS AMENDED, AND MAY NOT BE SOLD OR OTHERWISE TRANSFERRED WITHIN THE UNITED
STATES OR TO U.S.  PERSONS (AS SUCH TERMS ARE DEFINED IN REGULATION S UNDER SAID
ACT) EXCEPT IN TRANSACTIONS  EXEMPT FROM THE  REGISTRATION  REQUIREMENTS OF SAID
ACT.

                           CONVERTIBLE PROMISSORY NOTE


$1,832,747                                                         March 9, 1998


                  WHEREAS,  David H. Tobey ("Seller"),  Datatec Systems, Inc., a
Delaware corporation ("Buyer") and Computer-Aided Software Integration,  Inc., a
Delaware  corporation  ("CASI") have entered into an agreement dated as of March
9, 1998 (the "Stock Purchase  Agreement")  pursuant to which Buyer has agreed to
purchase from Seller 200 shares (the "CASI  Shares") of common stock,  par value
$.01 per share, of CASI;

                  WHEREAS,  a portion of the purchase  price for the CASI Shares
is the  obligation by Buyer to pay to Seller certain  amounts  subsequent to the
closing date of the transaction.

                  NOW,  THEREFORE,  for good  and  valuable  consideration,  the
receipt of which is hereby  acknowledged,  Buyer  hereby  promises to pay to the
order of Seller the  principal  amount of  $1,832,747  dollars on the earlier to
occur of (i) June 15, 1998 or (ii) the realization by the Buyer of $3 million or
more from the sale of equity  securities,  plus accrued and unpaid  interest and
all other charges  provided for herein on such date and as specified  below. The
interest payable under this Note shall begin to accrue on the date of this Note.

                  Buyer also  promises to pay  interest on the unpaid  principal
amount of this Note beginning on April 3, 1998 and on each one month anniversary
of such date (or on the next succeeding  business day if such anniversary is not
a business day) until the Note has been paid in full, at a rate equal to 10% per
annum (on the basis of a 365-day year and actual  number of days  elapsed)  from
and including  March 1, 1998 until such principal sum shall be paid in full, and
to pay  interest  in the event of  Default  (as  defined  below),  on any unpaid
principal, interest or other charges provided for herein, at a rate equal to 15%
per annum.

                  All payments of principal and interest in respect of this Note
shall be made in lawful  money of the United  States of  America in  immediately
available funds by wire transfer to Seller, at Chase


<PAGE>
Manhattan  Bank,  New York,  New York, ABA  #021000021,  A/C National  Financial
Services Corp., A/C # 066196-221,  F/C David H. Tobey and Tammy L. Tobey JTWROS,
Brok #:  X25125202,  or at such other place as shall be designated in writing by
Seller for such purpose.

                  Buyer hereby waives diligence, presentment,  dishonor, demand,
notice and protest and, to the full extent  permitted by law, the right to plead
any statute of limitations as a defense to any demand hereunder.  Buyer promises
to pay all costs and expenses, including reasonable attorneys' fees, incurred in
the collection and enforcement of this Note.  From time to time,  without in any
way affecting the obligation of Buyer to pay the outstanding  principal  balance
of this Note and any interest  accrued  thereon and fully to observe and perform
the covenants and  obligations  of Buyer under this Note,  without giving notice
to, or obtaining the consent of, Buyer, and without any liability  whatsoever on
the part of Seller,  Seller may,  at its option,  extend the time for payment of
interest hereon and/or  principal of this Note,  reduce the payments  hereunder,
release anyone liable on this Note or accept a renewal of this Note, join in any
extension or subordination,  or exercise any right or election hereunder. No one
or more of such  actions  shall  constitute a novation or operate to release any
party liable for or under this Note,  either as Buyer or otherwise.  Neither any
course of dealing by Seller nor any failure or delay on its part to exercise any
right,  power or privilege  hereunder  shall operate as a waiver of any right or
remedy of Seller  hereunder  unless  said  waiver is in  writing  and  signed by
Seller,  and then only to the extent  specifically set forth in said writing.  A
waiver as to one event shall not be construed  as a continuing  waiver by Seller
or as a bar to or waiver  of any right or remedy by Seller as to any  subsequent
event.

                  Each of the following shall constitute a "Default"  hereunder:
(i) Buyer's  failure to make any required  payment of principal  and/or interest
under  this Note,  or any other  amount  due and  payable  under this Note on or
before the date on which such  payment  is due under  this  Note;  (ii)  Buyer's
failure to perform any other  obligation  (other than one that can be  satisfied
with the payment of money) required under this Note or the Pledge Agreement, and
the  continuation  of such  failure for a period of five days after Seller gives
Buyer written notice of such failure to perform;  and (iii) Buyer's  insolvency,
general  assignment  for the benefit of  creditors,  or the  commencement  by or
against Buyer of any case, proceeding,  or other action seeking  reorganization,
arrangement,  adjustment,  liquidation,  dissolution,  or composition of Buyer's
debts under any law relating to bankruptcy,  insolvency,  or reorganization,  or
relief of debtors, or seeking appointment of a receiver,  trustee, custodian, or
other similar  official for Buyer or for all or any substantial  part of Buyer's
assets.

                  Upon the  occurrence  and  continuance  of a  Default  and the
delivery of written  notice by either Buyer or Seller  specifying the nature and
status of the Default (the "Default  Notice"),  Seller's sole remedies  shall be
(i) to cause all of the Note Obligations to

                                       -2-

<PAGE>
be converted into Datatec Shares at the applicable  Conversion Price, or (ii) if
the Liquidity  Condition is not  satisfied  and no prior  conversion of any Note
Obligations  has  occurred,  to  exercise  its  rights  under the  Stock  Pledge
Agreement  of  even  date  herewith   between  Buyer  and  Seller  (the  "Pledge
Agreement").  Not later  than three (3)  business  days  after  delivery  of the
Conversion Notice (as defined below),  the Buyer shall irrevocably  instruct its
transfer  agent to issue and shall use its best  efforts  to cause its  transfer
agent to send as soon as reasonably  practicable by reputable  overnight courier
to Seller or to Seller's  designee,  at the address designated in the Conversion
Notice,  a certificate or certificates for the number of Datatec Shares to which
Seller  or  Seller's  designee,  as the case  may be,  shall  be  entitled  upon
conversion.  On and after the issuance  date, the Buyer shall be treated for all
purposes as the record holder of such Datatec Shares.

                  If, upon any conversion of this Note, the Liquidity  Condition
is satisfied,  the Seller shall be obligated to effectuate the conversion of all
Note  Obligations  at the applicable  Conversion  Price within ten (10) business
days  after  the  date of the  Default  Notice  (in  denominations  of at  least
$500,000,  or such lesser amount as is then  outstanding) by delivering  written
notice(s) of conversion,  substantially in the form of Exhibit I attached hereto
(the  "Conversion  Notice") to the Buyer.  In the event that the Seller fails to
convert all Note Obligations  following the expiration of such ten (10) business
day period,  all remaining Note Obligations shall  automatically be deemed to be
converted  effective  as of such date  without  any action on the part of Seller
(except that Seller shall have an  obligation to provide Buyer with a Conversion
Notice prior to receipt of the Datatec Shares).  Notwithstanding anything herein
to the contrary, if the Liquidity Condition was satisfied upon any conversion of
this Note but prior to the  conversion  of all Note  Obligations  the  Liquidity
Condition becomes unsatisfied,  the Seller shall have ninety (90) days following
the date of the Default Notice to convert all remaining Note  Obligations at the
then applicable Conversion Price.

                  If the Liquidity  Condition is not  satisfied  with respect to
the FIRST conversion of any Note  Obligations,  the Seller shall be obligated to
either (i) effectuate  the conversion of all Note  Obligations at the applicable
Conversion  Price by  delivering  one or more  Conversion  Notices in the manner
described above (in denominations of at least $500,000, or such lesser amount as
is then  outstanding),  or (ii)  exercise his rights in the CASI Shares owned by
Buyer in accordance with the terms of the Pledge Agreement (the "Pledge Rights")
by delivering the Conversion  Notice to the Buyer  indicating such election,  in
either case prior to the  expiration  of ninety (90) days  following the date of
the Default Notice.  If Seller neither  converts this Note nor exercises  Pledge
Rights prior to the expiration of such 90 day period, the Seller shall be deemed
to have elected to convert this Note and all remaining Note Obligations shall be
converted  effective  as of such date  without  any action on the part of Seller
(except that Seller

                                       -3-

<PAGE>
shall have an  obligation  to provide  Buyer with a  Conversion  Notice prior to
receipt of the Datatec Shares).

                  For  the  purposes  of the  preceding  three  paragraphs,  the
following terms shall have the meanings indicated:

                           1.  "Conversion  Price"  means  (i) if the  Liquidity
                  Condition is satisfied  with  respect to any  conversion,  the
                  Conversion  Price for such conversion  shall equal the average
                  closing bid price of the Common  Stock on the NASDAQ  SmallCap
                  Market as  reported  in the WALL  STREET  JOURNAL for the five
                  trading  days  ending one trading day prior to the date of the
                  Conversion  Notice,  multiplied by 0.75; (ii) if the Liquidity
                  Condition is not satisfied with respect to any conversion, the
                  Conversion  Price for such conversion  shall equal the average
                  closing bid price of the Common  Stock on the NASDAQ  SmallCap
                  Market as  reported  in the WALL  STREET  JOURNAL for the five
                  trading  days  ending one trading day prior to the date of the
                  Conversion Notice, multiplied by 0.50.

                           2.  "Datatec  Shares"  means the  shares  of  Datatec
                  Common Stock, par value $0.001 per share (the "Common Stock"),
                  issuable upon the conversion of this Note.

                           3.  "Liquidity  Condition"  means the condition  that
                  shall be satisfied with respect to any conversion of this Note
                  or  exercise  of the Pledge  Rights if (i) the  average  daily
                  volume of trading of the Common  Stock as reported in the WALL
                  STREET JOURNAL for the ten trading days ending one trading day
                  prior to date of the Conversion Notice is greater than 125,000
                  shares,  (ii) the closing bid price of the Common Stock on the
                  trading day prior to the date of the Conversion  Notice is not
                  less than $2.50 and (iii) in the event of any  conversion,  on
                  the date that the Datatec  Shares are issued to Seller,  there
                  is an effective  registration statement registering the resale
                  of the Datatec Shares by the Seller.

                           4.  "Note  Obligations"  means the sum of all  unpaid
                  principal,  accrued but unpaid  interest and all other charges
                  and  expenses  payable by Buyer in  connection  with this Note
                  through the date on which the  Conversion  Notice is delivered
                  or deemed to be delivered to Buyer.

                  If any  payment on this Note  becomes due and payable on a day
which is not a business day, the maturity  thereof shall be extended to the next
business day and interest  shall be payable at the  applicable  rate during such
extension period.

                  The terms of this Note are not subject to amendment  except by
written  agreement of Seller and Buyer.  Unless  agreed in writing by the Buyer,
neither this Note nor any rights  evidenced by this Note may be  transferred  or
assigned by the Seller, provided,

                                       -4-

<PAGE>
however,  that Seller may assign this Note and the rights evidenced by this Note
to any parent,  spouse,  brother or sister, natural or adopted lineal descendent
of Seller or to any trustee of a trust of which  Seller or any  parent,  spouse,
brother or sister,  natural or adopted lineal  descendent of Seller are the sole
beneficiaries.  Buyer may not assign its obligations hereunder without the prior
written consent of the Seller.

                  Payment of the indebtedness  evidenced by this Note is secured
by a  first-priority  security  interest in certain  assets of Buyer  pledged to
Seller pursuant to the Pledge Agreement.

                  This Note may be prepaid at any time by Buyer  either in whole
or in part. In addition, Buyer may pay the outstanding principal balance of this
Note, any interest  accrued thereon and all other charges provided herein at any
time prior to conversion of this Note or Buyer's  exercise of Rights pursuant to
the Pledge Agreement.

                  This Note shall be governed by and  construed  and enforced in
accordance  with the laws of State of New York,  without regard to principles of
conflicts of laws.

                  Any notice or other  communication  or  delivery  required  or
permitted  hereunder  shall be in writing and shall be delivered  personally  or
sent by certified mail, postage prepaid, or by a nationally recognized overnight
courier  service,  or by facsimile,  and shall be deemed given when so delivered
personally,  by overnight courier service, or by facsimile, or, if mailed, three
(3) days after the date of deposit in the United States mails,  to the addresses
set forth in  Section  10.2 of the Stock  Purchase  Agreement  or to such  other
address as the Buyer or Seller shall have  specified by notice in writing to the
other in the manner set forth above.

                  In the event  that any one or more of the  provisions  of this
Note shall for any reason be held to be invalid, illegal or unenforceable in any
respect,  such invalidity,  illegality or unenforceability  shall not affect any
other  provision  of this  Note,  and this Note  shall be  construed  as if such
invalid,  illegal or unenforceable provision had never been contained herein. It
is  expressly  agreed  that time is of the  essence  in the  performance  of the
obligations set forth in this Note.

              [THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]



                                       -5-

<PAGE>
                  IN WITNESS WHEREOF, Buyer has duly executed this Note, the day
and year first above written.



                                             DATATEC SYSTEMS, INC.



                                             By:________________________________
                                             Name:
                                             Title:



                                       -6-

<PAGE>
                                                                       EXHIBIT B

                          REGISTRATION RIGHTS AGREEMENT

                  REGISTRATION RIGHTS AGREEMENT (this "Agreement"),  dated as of
March 9, 1998,  between  Datatec  Systems.  Inc.,  a Delaware  corporation  (the
"Company") and David H. Tobey ("Tobey").

                  1.       Introduction.  The Company and Tobey are each a party
to the Stock Purchase Agreement (the "Stock Purchase  Agreement") dated March 9,
1998 pursuant to which Tobey agreed,  among other things,  to sell 200 shares of
the  common  stock,  par  value  $.01  per  share,  of  Computer-Aided  Software
Integration,  Inc., a Delaware  corporation,  to the Company. As partial payment
for such sale, the Company issued a Convertible  Promissory  Note dated March 9,
1998 payable to Tobey or permitted assigns  thereunder (the "Promissory  Note").
The Promissory Note contains certain conversion provisions which permit Tobey to
elect to receive  from time to time,  shares of the Common Stock of the Company.
par value $.001 per share (the  "Common  Stock"),  in lieu of all or part of the
cash payments  thereunder.  Certain capitalized terms used in this Agreement are
defined in section 3 hereof; references to sections shall be to sections of this
Agreement.

                  2.       Registration Under Securities Act, Etc.

                           2.1 Registration.  As soon as reasonably  practicable
after  the  date  hereof,  the  Company  shall  (subject  to the  terms  of this
Agreement)  effect  the  registration  of the  resale of all of the  Registrable
Securities under the Securities Act. The  registration  statement filed pursuant
to this Section 2.1 shall  register  such number of shares of Common Stock based
on a  hypothetical  conversion  of the  Promissory  Note on the  date  that  the
registration  statement  filed  pursuant  to this  Section  2.1 is filed and, as
permitted by the Commission,  shall include an indeterminate number of shares of
Common Stock issuable upon  conversion of the Promissory Note and resulting from
fluctuating  market  prices of the Common  Stock (and a  fluctuating  conversion
ratio pursuant to the  Promissory  Note).  Registrations  under this Section 2.1
shall  be on  Form  S-3 or  another  appropriate  registration  form  permitting
registration  of  Registrable  Securities  for  resale  by  Tobey  in  a  manner
designated by him,  including  public or private sales. The Company will pay all
Registration Expenses in connection with any registration  requested pursuant to
this Section 2.1.

                           2.2 Registration  Procedures.  In order to effect the
registration of any Registrable  Securities under the Securities Act as provided
in section 2.1, the Company shall:

                           (i)  prepare  and  file (in no  event  later  than 15
                           business days after the date hereof) with the



<PAGE>

                           Commission  the requisite  registration  statement to
                           effect such registration and thereafter shall use its
                           best efforts to cause such registration  statement to
                           be declared effective;  PROVIDED,  that before filing
                           such   registration   statement  or  any   amendments
                           thereto,  the  Company  will  furnish to the  counsel
                           selected  by  Tobey  copies  of  all  such  documents
                           proposed to be filed, which documents will be subject
                           to the review of such counsel;

                           (ii)  prepare  and  file  with  the  Commission  such
                           amendments  and  supplements  to  such   registration
                           statement  and  the  prospectus  used  in  connection
                           therewith   as  may  be   necessary    to  keep  such
                           registration  statement  effective and to comply with
                           the  provisions of the Securities Act with respect to
                           the  disposition  of all  securities  covered by such
                           registration  statement  until all of such securities
                           have been disposed of in accordance with the intended
                           methods  of  disposition  by the  seller  or  sellers
                           thereof set forth in such  registration  statement or
                           such earlier date as all Registrable  Securities have
                           been sold pursuant to Rule 144;

                           (iii)  furnish  to Tobey  such  number  of  conformed
                           copies  of such  registration  statement  and of each
                           such amendment and  supplement  thereto (in each case
                           including all exhibits), such number of copies of the
                           prospectus  contained in such registration  statement
                           (including  each   preliminary   prospectus  and  any
                           summary  prospectus) and a ny other  prospectus filed
                           under  Rule  424  under  the   Securities   Act,   in
                           conformity  with the  requirements  of the Securities
                           Act,   and  such  other   documents,   as  Tobey  may
                           reasonably request;

                           (iv) register or qualify all  Registrable  Securities
                           and other  securities  covered  by such  registration
                           statement  under such other  securities  laws or blue
                           sky laws of such  jurisdictions as any seller thereof
                           and any  underwriter of the securities  being sold by
                           Tobey  shall   reasonably   request,   to  keep  such
                           registrations or qualifications in effect for so long
                           as such registration statement remains in effect, and
                           take  any  other  action  which  may  be   reasonably
                           necessary  or  advisable  to enable  such  seller and
                           underwriter  to consummate  the  disposition  in such
                           jurisdictions of the securities owned by Tobey;

                                       -2-

<PAGE>

                           (v)  furnish  to  the   Company's   transfer   agent,
                           immediately    upon   the    effectiveness   of   the
                           registration statement, an opinion of counsel for the
                           Company,   dated   the   effective   date   of   such
                           registration  statement,  stating  that the resale of
                           the  Registrable  Securities by Tobey pursuant to the
                           registration   statement   will   not   violate   the
                           Securities   Act,   provided  that  the   assumptions
                           contained therein remain true, complete and accurate;

                           (vi) notify Tobey promptly and confirm such notice in
                           writing promptly thereafter:

                                (a)  when  the   registration   statement,   the
                                prospectus or any prospectus  supplement related
                                thereto  or  post-effective   amendment  to  the
                                registration statement has been filed, and, with
                                respect  to the  registration  statement  or any
                                post-effective  amendment thereto, when the same
                                has become effective;

                                (b)  of  any  request  by  the   Commission  for
                                amendments or  supplements  to the  registration
                                statement or the  prospectus  or for  additional
                                information;

                                (c) of the  issuance  by the  Commission  of any
                                stop order  suspending the  effectiveness of the
                                registration  statement  or  the  initiation  of
                                proceedings by any Person for that purpose;

                                (d)  of  the  receipt  by  the  Company  of  any
                                notification  with respect to the  suspension of
                                the qualification of any Registrable  Securities
                                for sale under the  securities  or blue sky laws
                                of any  jurisdiction or the initiation or threat
                                of any proceeding for such purpose;

                           (vii)  notify  Tobey (at any time  when a  prospectus
                           relating  thereto is required to be  delivered  under
                           the Securities  Act) upon discovery that, or upon the
                           happening  of any  event as a result  of  which,  the
                           prospectus  included in such registration  statement,
                           as then in effect,  includes an untrue statement of a
                           material  fact or omits to state  any  material  fact
                           required to be stated  therein or  necessary  to make
                           the statements therein not misleading in the light of
                           the circumstances  under which they were made, and at
                           the request of any


                                       -3-

<PAGE>
                           such  seller  promptly  prepare  and  furnish to such
                           seller and each  underwriter,  if any,  a  reasonable
                           number of copies of a  supplement  to or an amendment
                           of such  prospectus  as may be necessary so that,  as
                           thereafter   delivered  to  the  purchasers  of  such
                           securities,  such  prospectus  shall not  include  an
                           untrue  statement of a material fact or omit to state
                           a  material  fact  required  to be stated  therein or
                           necessary   to  make  the   statements   therein  not
                           misleading  in the light of the  circumstances  under
                           which they were made;

                           (viii) use its best efforts to obtain the  withdrawal
                           of any  order  suspending  the  effectiveness  of the
                           registration   statement  at  the  earliest  possible
                           moment;

                           (ix)  otherwise  use its best  efforts to comply with
                           all   applicable   rules  and   regulations   of  the
                           Commission,   and  make  available  to  its  security
                           holders,  as  soon  as  reasonably  practicable,   an
                           earnings  statement  covering  the period of at least
                           twelve  months,  but not more than  eighteen  months,
                           beginning  with the first day of the Company's  first
                           full calendar  month after the effective date of such
                           registration statement which earnings statement shall
                           satisfy  the  provisions  of  Section  11  (a) of the
                           Securities  Act and  Rule  158  thereunder,  and will
                           furnish  to each such  seller  at least two  business
                           days  prior  to the  filing  thereof  a  copy  of any
                           amendment   or   supplement   to  such   registration
                           statement  or  prospectus  and  shall  not  file  any
                           thereof   to  which  any  such   seller   shall  have
                           reasonably   objected  on  the   grounds   that  such
                           amendment  or  supplement  does  not  comply  in  all
                           material   respects  with  the  requirements  of  the
                           Securities   Act  or  of  the  rules  or  regulations
                           thereunder;

                           (x)  provide  and cause to be  maintained  a transfer
                           agent and  registrar for all  Registrable  Securities
                           covered by such registration statement from and after
                           a date  not  later  than the  effective  date of such
                           registration statement;

                           (xi) use its  best  efforts  to list all  Registrable
                           Securities covered by such registration  statement on
                           any   securities   exchange   on  which  any  of  the
                           securities  of the  same  class  as  the  Registrable
                           Securities are the listed.


                                       -4-

<PAGE>
The  Company  may  require  Tobey to furnish  to the  Company  such  information
regarding the distribution of the  Registrable  Securities as is required by law
to be disclosed in the  registration  statement.  The Company shall not file any
registration  statement or amendment thereto or any prospectus or any supplement
thereto  (including such documents  incorporated by reference and proposed to be
filed after the initial  filing of the  registration  statement)  to which Tobey
shall reasonably object on a timely basis.

Tobey  covenants  and agrees that (i) he will not offer or sell any  Registrable
Securities under the registration  statement until he has received copies of the
Prospectus as then amended or supplemented and notice from the Company that such
registration  statement and any post amendments thereto have become effective as
contemplated  by Section 2.2(vi) (a), (ii) Tobey will comply with the prospectus
delivery  requirements  of the Securities Act as applicable to him in connection
with sales of Registrable  Securities  pursuant to the  registration  statement,
(iii) upon receipt of a notice from the Company of the  occurrence  of any event
of the kind  described in Section  2.2(vi) (c) or Section  2.2(vii),  Tobey will
forthwith discontinue  disposition of such Registrable  Securities until Tobey's
receipt of the copies of the supplemented Prospectus and/or amended registration
statement,  or until he is advised in writing by the Company that the use of the
applicable  Prospectus may be resumed and in either case has received  copies of
any additional or  supplemental  filings that are  incorporated  or deemed to be
incorporated by reference in such Prospectus or registration statement.

                           2.3   Preparation;   Reasonable   Investigation.   In
connection with the preparation and filing of the  registration  statement under
the  Securities  Act pursuant to this  Agreement the Company will give Tobey his
underwriters,  if any, and his counsel and accountants the opportunity to review
such registration  statement each prospectus  included therein or filed with the
Commission, and each amendment thereof or supplement thereto. and will give each
of them such access to its books and records and such  opportunities  to discuss
the  business  of the  Company  with its  officers  and the  independent  public
accountants  who have certified its financial  statements as shall be necessary,
in the opinion of such holders' and such underwriters'  respective  counsel,  to
conduct a reasonable investigation within the meaning of the Securities Act.

                           2.4 Indemnification.

                               (a)  Indemnification By The Company. In the event
of any  registration  of any  Registrable  Securities  of the Company  under the
Securities Act, the Company,  shall and hereby does agree to, indemnify and hold
harmless.  Tobey,  each other Person who  participates  as an underwriter in the
offering or


                                       -5-

<PAGE>

sale of such securities and each other Person,  if any, who controls such holder
or any such  underwriter  within the meaning of the Securities Act,  against any
losses, claims, damages or liabilities (joint or several) to which Tobey or such
underwriter or controlling person may become subject under the Securities Act or
otherwise insofar as such losses,  claims, damages or liabilities (or actions or
proceedings whether commenced or threatened, in respect thereof) arose out of or
are based upon any untrue  statement or alleged untrue statement of any material
act contained in any  registration  statement  under which such  securities were
registered  under  the  Securities  Act,  any  preliminary   prospectus,   final
prospectus  or  summary  prospectus  contained  therein,  or  any  amendment  or
supplement  thereto,  or any  omission or alleged  omission  to state  therein a
material fact  required to be stated  therein or necessary to make the statement
therein not misleading, and the Company will reimburse such holder and each such
director, officer, underwriter and controlling person for any legal or any other
expenses  reasonably  incurred  by  them in  connection  with  investigating  or
defending any such loss, claim, liability,  action or proceeding,  PROVIDED that
the  Company  shall not be liable in any such case to the  extent  that any such
loss, claim,  damage,  liability (or action or proceeding in respect thereof) or
expense  arises out of or is based upon an untrue  statement  or alleged  untrue
statement or omission or alleged omission made in such  registration  statement,
any such preliminary prospectus, final prospectus, summary prospectus, amendment
or  supplement  in reliance  upon and in  conformity  with  written  information
furnished  to  the  Company  specifically  stating  that  it is  for  use in the
preparation  thereof and,  provided further that the Company shall not be liable
to any Person who  participates  as an  underwriter  in the  offering or sale of
Registrable  Securities  or to any  other  Person,  if any,  who  controls  such
underwriter  within the meaning of the  Securities  Act, in any such case to the
extent that any such loss, claim, damage,  liability (or action or proceeding in
respect  thereof) or expense arises out of such Person's failure to send or give
a copy of the final prospectus, as the same may be then supplemented or amended,
to the Person  asserting the existence of an untrue  statement or alleged untrue
statement  or  omission  or  alleged   omission  at  or  prior  to  the  written
confirmation  of the sale of  Registrable  Securities  to such  Person,  if such
statement or omission was  corrected in such final  prospectus.  Such  indemnity
shall remain in full force and effect regardless of any investigation made by or
on  behalf  of  such  holder  or any  such  director,  officer,  underwriter  or
controlling  person and shall  survive the transfer of such  securities  by such
holder.

                               (b)  Indemnification By The Sellers.  Tobey shall
indemnify  and hold  harmless  (in the same manner and to the same extent as set
forth in section 2.4(a)) the Company, each director of the Company, each officer
of the Company and each


                                       -6-

<PAGE>
other  person,  if any,  who  controls  the  Company  within the  meaning of the
Securities  Act,  with  respect  to any  statement  or alleged  statement  in or
omission or alleged omission from such registration  statement,  any preliminary
prospectus final, prospectus or summary  prospectus  contained  therein,  or any
amendment  or  supplement  thereto if such  statement  or alleged  statement  or
omission or alleged  omission was made in reliance upon and in  conformity  with
written information  furnished to the Company  specifically  stating that it is
for  use  in  the  preparation  of  such  registration  statement,   preliminary
prospectus, final prospectus,  summary prospectus,  amendment or supplement. Any
such  indemnity  shall  remain  in full  force  and  effect,  regardless  of any
investigation  made by or on  behalf of the  Company  or any such  director,  of
officer or controlling  person and shall survive the transfer of such securities
by such seller.

                               (c)  Notices  Of  Claims,   etc.  Promptly  after
receipt by an indemnified  party of notice of the  commencement of any action or
proceeding  involving a claim referred to in this Section 2.4, such  indemnified
party will, if a claim in respect  thereof is to be made against an indemnifying
party, give written notice to the indemnifying party of the commencement of such
action,  provided  that the failure of any  indemnified  party to give notice as
provided  herein  shall not relieve the  indemnifying  party of its  obligations
under section 2.4, except to the extent that the indemnifying  party is actually
prejudiced  by such failure to give  notice.  In case any such action is brought
against an indemnified  party,  unless in such  indemnified  party's  reasonable
judgment a conflict  of  interest  between  such  indemnified  and  indemnifying
parties  may exist in respect of such  claim,  the  indemnifying  party shall be
entitled to participate in and to assume the defense  thereof,  jointly with any
other indemnifying party similarly notified, to the extent that the indemnifying
party may wish, with counsel reasonably  satisfactory to such indemnified party,
and after notice from the indemnifying  party to such  indemnified  party of its
election so to assume the defense thereof,  the indemnifying  party shall not be
liable to such  indemnified  party for any legal or other expenses  subsequently
incurred  by the  latter in  connection  with the  defense  thereof  other  than
reasonable  costs of  investigation.  No indemnifying  party shall,  without the
consent of the indemnified party, consent to entry of any judgment or enter into
any  settlement  of any such action  which does not include as an  unconditional
term thereof the giving by the claimant or plaintiff to such  indemnified  party
of a release  from all  liability  in respect to such  claim or  litigation.  No
indemnified  party  shall  consent  to entry of any  judgment  or enter into any
settlement  of any such  action  the  defense  of which has been  assumed  by an
indemnifying party without the consent of such indemnifying party.

                                       -7-

<PAGE>
                               (d)   Other   Indemnification.    Indemnification
similar to that  specified  in the  preceding  subdivisions  of this Section 2.4
(with  appropriate  modifications)  shall be given by the Company and Tobey with
respect to any required registration or other qualification of securities trader
any Federal or state law or regulation of any governmental authority, other than
the Securities Act.

                               (c) Indemnification Payments. The indemnification
required by this  Section  2.4 shall be made by periodic  payments of the amount
thereof during the course of the investigation or defense, as and when bills are
received or expense, loss, damage or liability is incurred.

                               (f) Contribution. If the indemnification provided
for in this Section 2.4 is unavailable to an indemnified party in respect of any
expenses  loss,  claim,  damage or  liability  referred  to  therein,  then each
indemnifying  party,  in lieu of  indemnifying  such  indemnified  party,  shall
contribute to the amount paid or payable by such  indemnified  party as a result
of such expense,  loss, claim,  damage or liability (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company, on the one
hand and the  holder or  underwriter,  as the case may be, on the other from the
distribution of the Registrable Securities or (ii) if the allocation provided by
clause (i) above is not  permitted by applicable  law, in such  proportion as is
appropriate to reflect not only the relative  benefits referred to in clause (i)
above  but also the  relative  fault of the  Company  on the one hand and of the
holder or  underwriter,  as the case may be, on the other in connection with the
statements  or  omissions  which  resulted  in such  expense,  loss,  damage  or
liability, as well as any other relevant equitable considerations.  The relative
fault of the  Company on the one hand and of the holder or  underwriter,  as the
case may be, or the other shall be determined by reference to, among other thing
whether the untrue or alleged untrue statement of a material Pact or omission to
state a material  fact relates to  information  supplied by the Company,  by the
holder or by the underwriter and the parties' relative intent, knowledge, access
to information and opportunity to correct or prevent such statement or omission,
PROVIDED  that the  foregoing  contribution  agreement  shall  not  inure to the
benefit of any indemnified party if indemnification would be unavailable to such
indemnified party by reason of the provisions contained in the first sentence of
section 2.4(a) and in no event shall the obligation of any indemnifying party to
contribute  under this Section  2.4(f) exceed the amount that such  indemnifying
party  would  have  been  obligated  to pay by  way  of  indemnification  if the
indemnification  provided for under  section  2.4(a) or section  2.4(b) had been
available under the circumstances.

                                       -8-

<PAGE>
                               The  Company and Tobey agree that it would not be
just  and  equitable  if  contribution  pursuant  to this  subdivision  (f) were
determined by PRO RATA allocation (even if the holders and any underwriters were
heated as one entity for such purpose) or by any other method of allocation that
does  not  take  account  of the  equitable  considerations  referred  to in the
immediately  preceding  paragraph.  The amount paid or payable by an indemnified
party as a result of the losses, claims, dam ages and liabilities referred to in
the immediately  preceding paragraph shall be deemed to in eludes subject to the
limitations  set forth in the  preceding  sentence and  subdivision  (c) of this
Section 2.4, any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any such action or claim.

                               Notwithstanding  the  provisions  of this Section
2.4(f), no holder of Registerable Securities or underwriter shall be required to
contribute  any  amount in excess of the  amount by which (i) in the case of any
such  holder,  the  net  proceeds  received  by such  holder  From  the  sale of
Registrable  Securities or (ii) in the case of all underwriter,  the total price
at which the  Registrable  Securities  purchased  by it and  distributed  to the
public were offered to the public  exceeds,  in any such case, the amount of any
damages that such holder or  underwriter  has otherwise  been required to pay by
reason of such untrue or alleged untrue statement or omission.  No Person guilty
of  fraudulent  misrepresentation  (within  the meaning of Section 11 (f) of the
Securities Act) shall be entitled to  contribution  frown any person who was not
guilty of such fraudulent misrepresentation.

                  3.       Definitions.  As  used  herein,  unless  the  context
otherwise requires, the following terms have the following respective meanings:

                  Commission: The Securities and Exchange Commission.

                  Common Stock: As defined in section 1.

                  Company:  As defined  in the  introductory  paragraph  of this
                  Agreement.

                  Exchange  Act: The  Securities  Exchange  Act of 1934,  or any
                  similar Federal statute,  and the rules and regulations of the
                  Commissions  thereunder,  all as the saline shall be in effect
                  at  the  time.  Reference  to  a  particular  section  of  the
                  Securities  Exchange Act of 1934 shall  include a reference to
                  the comparable  section,  if any, of any such similar  Federal
                  statute.

                  Person:  A corporation,  an  association,  a  partnership,  an
                  organization, business, an individual, a


                                     -9-

<PAGE>
                  governmental   or   political   subdivision   thereof   or   a
                  governmental agency.

                  Promissory Note: As defined in section 1.

                  Registrable  Securities:  All shares of Common Stock  issuable
                  pursuant to the Promissory Note and any shares of Common Stock
                  and any  securities  issued or  issuable  with  respect to any
                  Common  Stock  referred  to above by way of stock  dividend or
                  stock split or in  connection  with a  combination  of shares,
                  recapitalization,     merger,     consolidation    or    other
                  reorganization or otherwise.  As to any particular Registrable
                  Securities,  such  securities  shall cease to be  Registerable
                  Securities  when (a) a registration  statement with respect to
                  the sale of such securities  shall have become effective under
                  the  Securities  Act  and  such  securities  shall  have  been
                  disposed of in accordance  with such  registration  statement,
                  (b) they shall have been distributed to the public pursuant to
                  Rule 144 (or any  successor  provision)  under the  Securities
                  Act, (c) they shall have been  otherwise  transferred,  or (d)
                  they shall have ceased to be outstanding.

                  Registration  Expenses: All expenses incident to the Company's
                  performance  of  or  compliance  with  section  2,  including,
                  without  limitation.  all registration,  filing and NASD fees,
                  all stock  exchange  listing  fees,  all fees and  expenses of
                  complying   with   securities  or  blue  sky  laws,  all  word
                  processing,  duplicating and printing expenses,  messenger and
                  delivery  expenses,  the fees and disbursements of counsel for
                  the  Company  and  of  its  independent  public   accountants,
                  including the expenses of any special audits or "cold comfort"
                  letters  required  by or  incident  to  such  performance  and
                  compliance,  premiums and other costs of policies of insurance
                  against liabilities of the Company, its officers and directors
                  arising  out  of  the  public   offering  of  the  Registrable
                  Securities being registered and any fees and  disbursements of
                  underwriters   customarily  paid  by  issuers  or  sellers  of
                  securities,   but   excluding   underwriting   discounts   and
                  commissions  and  transfer  taxes,  if any. In  addition,  the
                  Company shall pay up to $5,000 for the fees and  disbursements
                  of one counsel retained by Tobey in connection with the filing
                  of the registration statement hereunder.

                  Securities  Act: the  Securities  Act of 1933,  or any similar
                  Federal  statute,   and  the  rules  and  regulations  of  the
                  Commission  thereunder,  all as of the same shall be in effect
                  at  the  time.  References  to a  particular  section  of  the
                  Securities Act of 1933 shall include a


                                      -10-

<PAGE>
                  reference  to the  comparable  section,  if any,  of any  such
                  similar Federal stature.

                  Stock Purchase Agreement: As defined in section 1.

                  4. Rule 144.  If the Company  shall have filed a  registration
statement  pursuant to the  requirements  of section 12 of the Exchange Act or a
registration  statement  pursuant to the requirements of the Securities Act, the
Company shall file the reports  required to be filed by it under the  Securities
Act and the Exchange Act and the rules and regulations adopted by the Commission
thereunder (or, if the Company is not required to file such reports,  will, upon
the request of Tobey, make publicly  available other information) and shall take
such furler action as Tobey may reasonably  request,  all to the extent required
from  time to time to  enable  Tobey  to  sell  Registrable  Securities  without
registration  under the  Securities  Act within the limitation of the exemptions
provided by (a) Rule 144 under the  Securities  Act, as such Rule may be amended
from time to time,  or (b) any similar rule or regulation  hereafter  adopted by
the  Commission.  Upon the request of Tobey,  the Company  shall deliver to such
holder a written  statement as to whether it has complied with the  requirements
of this Section 4.

                  5.  Amendments And Waivers.  This Agreement may be amended and
the Company may take any action  herein  prohibited,  or omit to perform any act
herein  required to be performed  by it, only by the written  consent of each of
the Company and Tobey.

                  6. Notices.  Except as otherwise  provided in this  Agreement,
all  notices,  requests  and other  communications  to any Person  provided  for
hereunder  shall be in writing and shall be given to such Person (as in the case
of Tobey, at 1545 Shadowtree Court, Colorado Springs,  Colorado 80921 or at such
other  address that such holder shall have  furnished to the Company in writing,
or (b) in the case of the Company, at 20 C Commerce Way, Totowa, NJ 07512 to the
attention of its Chief Financial  Officer,  or at such other address.  or to the
attention of such other  officer,  as the Company shall be furnished to Tobey in
writing. Each such notice, request or other communication shall be effective (i)
if given by mail 72 hours after such  communication  is  deposited  in the mails
with first class postage prepaid, addressed as aforesaid or (ii) if given by any
other means (including,  without limitation,  by air courier), when delivered at
the address specified above.

                  7. Assignment.  This Agreement shall be binding upon and inure
to the benefit of and be enforceable by the parties hereto and their  respective
successors and assigns,  including,  in the case of Tobey, the permitted assigns
under the Promissory Note.

                                      -11-

<PAGE>
                  8.  Descriptive  Headings.  The  descriptive  headings  of the
several  sections and  paragraphs  of this  Agreement are inserted for reference
only and shall not limit or otherwise affect the meaning hereof.

                  9.  Governing  Law  THIS  AGREEMENT  SHALL  BE  CONSTRUED  AND
ENFORCED IN  ACCORDANCE  WITH AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY
THE  LAWS OF THE  STATE OF NEW  YORK  WITHOUT  REFERENCE  TO THE  PRINCIPLES  OF
CONFLICTS OF LAWS.

                  10.    Counterparts.    This   Agreement   may   be   executed
simultaneously  in any number of counterparts,  each of which shall be deemed an
original but all such  counterparts  shall together  constitute one and the same
instrument.   In  the  event  that  any  signature  is  delivered  by  facsimile
transmission,  such signature shall create a valid and binding obligation of the
party  executing  the same with the same force and  effect as if such  facsimile
signature were the original thereof.

                  11.  Entire  Agreement.  This  Agreement  embodies  the entire
agreement  and  understanding  between the  Company and each other party  hereto
relating to the subject matter hereof and  supersedes  all prior  agreements and
understandings relating to such subject matter.

                  12. Severability.  If any provision of this Agreement,  or the
application  of such  provisions  to any Person or  circumstance,  shall be held
invalid,  the remainder of this Agreement,  or the application of such provision
to Persons or circumstances other than those to which it is held invalid,  shall
not be affected thereby.


                                      -12-

<PAGE>
                  IN WITNESS.  the patties  have  caused  this  Agreement  to be
executed and delivered by their respective officers thereunto duly authorized as
of the date first above written.

                                          DATATEC SYSTEMS, INC.




                                          By:____________________________
                                          Title:





                                          _______________________________
                                          DAVID H. TOBEY


                                      -13-

<PAGE>
                            NONCOMPETITION AGREEMENT

         THIS AGREEMENT dated March 9, 1998, is by and between DATATEC  SYSTEMS,
INC., a Delaware corporation ("Purchaser") and DAVID H. TOBEY ("Seller").

                              W I T N E S S E T H:

         WHEREAS,  Purchaser,  Seller and Computer-Aided  Software  Integration,
Inc., a Delaware  corporation  ("CASI"),  have  entered into that certain  Stock
Purchase Agreement dated March 9, 1998 (the "Purchase  Agreement"),  pursuant to
which Purchaser is purchasing all of the stock of CASI owned by Seller; and

         WHEREAS, as a condition to the closing of the transactions contemplated
by the  Purchase  Agreement,  Seller has  agreed to enter into a  Noncompetition
Agreement with Purchaser;

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants and promises made herein, the parties hereto agree as follows:

         1. CONSIDERATION.  As consideration for the covenants herein, Purchaser
shall pay, simultaneously with the execution hereof, $77,500 by wire transfer of
immediately available funds to an account designated by the Seller.

         2. TERM.  This Agreement shall commence on the date hereof and continue
for a period of two (2) consecutive years (the "Term").

         3.  NONCOMPETITION  AND RELATED  MATTERS.  During the Term Seller shall
not:

<PAGE>
                  (i)  directly  or  indirectly  own,  manage,   operate,  join,
control,  participate  in,  invest  in,  lend money to,  guarantee  the debts or
obligations  of or  otherwise be connected  with,  in any manner,  whether as an
officer, director, employee, partner, investor or otherwise, any business entity
that is engaged in the business of designing,  developing and marketing software
that assists in the configuration and integration process (the "CASI Business");

                  (ii)  for   himself   or  on  behalf  of  any  other   person,
partnership,  corporation  or  entity,  call  on any  customer  of  CASI  or any
successor to the CASI  Business  for the purpose of  soliciting  CASI  Business,
diverting  CASI  Business or taking away any customer of the CASI  Business from
the CASI Business or any successor to the CASI Business;

                  (iii) induce,  influence, or seek to induce or influence, Eric
Mathiesen,   Peter  Westphal,  Matthew  Good,  Heike  Nass,  David  Check,  Paul
Caracciolo,  Darren Dyson,  Steven  Schaffert  (except for Steven Schaffert with
respect  to  Cumetrix  Data  Systems  Corporation),  or Mae Walker or any future
employee, representative, agent, consultant or independent contractor engaged in
the  CASI  Business  as a  developer,  programmer,  technical  writer,  or  in a
technical  support  position,  to terminate his or her relationship with CASI or
any successor to the CASI Business; or

                  (iv) at any time  utilize  for any  commercial  purpose a name
incorporating the words "Computer-Aided Software Integration",  or "Integrator's
Workbench" or words or expressions likely to be

                                       -2-

<PAGE>
confused  therewith,  or which  shall be  likely to lead to  confusion  with the
business conducted by CASI or any successor to the CASI Business.

                  Nothing herein  contained  shall be deemed to prohibit  Seller
from  investing his funds in  securities of an issuer if the  securities of such
issuer are listed for trading on a national securities exchange or are traded in
the over-the-counter  market and the Executive's holdings therein represent less
than 5% of the total number of shares or principal  amount of the  securities of
such issuer outstanding.  Nothing contained in Section 3(i) or 3(ii) shall apply
to  Seller   activities  in  relation  to  Cumetrix  Data  Systems   Corporation
("Cumetrix")  to the extent that  Cumetrix  does not design or develop  software
that functions substantially the same as the software developed by CASI prior to
the date  hereof,  provided,  however,  that  nothing  herein shall be deemed to
prohibit  Seller  from  engaging in any  activities  which  would  otherwise  be
permitted under the terms of the Amended and Restated License  Agreement between
CASI and Cumetrix  (formerly known as DataNet  International,  Inc.) dated as of
July 1, 1997.

         4. ENFORCEABILITY; INJUNCTION. By reason the fact that irreparable harm
would be  sustained  by  Purchaser  if  there is any  breach  by  Seller  of its
covenants and agreements  under this  Agreement,  so long as Purchaser is not in
breach of its obligations under this Agreement, it is agreed that in addition to
any other rights which  Purchaser may have under this  Agreement or at law or in
equity, Purchaser shall be entitled to apply to any court of

                                       -3-

<PAGE>
competent  jurisdiction  for, and obtain,  injunctive  relief  against Seller in
order to  prevent  any breach or  threatened  breach of the  provisions  of this
Agreement.

         5. BINDING  EFFECT;  WAIVER.  This Agreement  shall be binding upon and
shall  inure to the  benefit  of Seller and shall be binding on and inure to the
benefit of Purchaser and its successors. Neither this Agreement nor the interest
of either party herein shall be assigned by such party without the prior written
consent of the other  party being  first  obtained.  The waiver by either of the
parties of any breach of any provision  hereof shall not  constitute a waiver by
such party of any other or succeeding breach of any provision hereof.

         6. GOVERNING  LAW. This Agreement  shall be governed by the laws of the
State of New York, without regard to its principles of conflict of laws.

         7. ENTIRE  AGREEMENT.  This Agreement  constitutes the entire agreement
between the parties with respect to the subject matter hereof and supersedes any
prior or  contemporaneous  agreement or understanding  with respect thereto.  No
amendment  hereof  shall be deemed  valid  unless in  writing  and signed by the
parties hereto.

         8. REMEDIES.  No remedy conferred by any of the specific  provisions of
this  Agreement  is  intended  to be  exclusive  of any  other  remedy  which is
otherwise  available at law, in equity,  by statute or  otherwise,  and each and
every other remedy shall be  cumulative  and shall be in addition to every other
remedy given hereunder.

                                       -4-

<PAGE>





                    [SIGNATURES APPEAR ON THE FOLLOWING PAGE]

                                       -5-

<PAGE>
         IN WITNESS  WHEREOF,  Purchaser and Seller have executed this Agreement
on the date first above written.

                                       DATATEC SYSTEMS, INC.


                                       By: 
                                           ---------------------
                                           Name:  James M. Caci
                                           Title: CFO




                                       By:__________________________
                                            DAVID H. TOBEY



                                       -6-



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