THE CHASE MANHATTAN BANK

                               SECURITY AGREEMENT

                                (General Purpose)

This  Agreement,  made this day of, 31,  day of March,  1999  between  THE CHASE
MANHATTAN BANK (herein called the "Bank ") and P.C.  Workstation  Rentals,  Inc.
(herein called the "Borrower "), (the "Agreement ").

     1.  DEFINITIONS  OF  TERMS  USED  HEREIN.   (a)  "Borrower"   includes  all
individuals  executing  this  agreement  as parties  hereto and all members of a
partnership  when the Borrower is a  partnership,  each of whom shall be jointly
and severally liable individually and as partners hereunder.  (b) "Liability" or
"Liabilities" includes all liabilities (primary,  secondary, direct, contingent,
sole,  joint  or  several)  due or to  become  due,  or  that  may be  hereafter
contracted or acquired,  of the Borrower  (including  the Borrower and any other
person) to the Bank,  including without limitation all liabilities arising under
or from any note, loan or credit agreement,  letter of credit, guaranty,  draft,
acceptance,  interest rate or foreign exchange agreement or any other instrument
or agreement of (or the  responsibility of) the Borrower or any loan, advance or
other  extension  of credit or  financial  accommodation  to the Borrower by the
Bank.  (c)  "Proceeds"  means  whatever is  received  when  Collateral  is sold,
exchanged,  leased,  collected or otherwise disposed of and includes the account
arising  when the right to payment is earned  under a  contract.  (d)  "Security
Interest" means a lien or other interest in Collateral  which secures payment of
a liability or performance of an obligation. (e) "Collateral" means the property
described  in  Section 2 hereof  and the  following  described  property  of the
Borrower:

     All personal  property,  whether now or hereafter existing or now ownded or
hereafter  acquired and wherever located,  including but not limited to: (i) all
goods,  inventory,   equipment,  accounts,  furniture,  fixtures,   instruments,
documents,   chattel  paper  and  general  intangibles  and  all  additions  and
accessions thereto; (ii) all products and proceeds of the foregoing, in any form
(including,  without  limitation,  all claims  against third parties for loss or
damage to or destruction on any or all of the  foregoing);  and (iii) all books,
records and other property relating to any of the foregoing.

     All terms used herein  which are also  defined in the New York or any other
applicable  Uniform Commercial Code shall also have at least the meanings herein
as therein defined.

     2.  SECURITY  INTEREST.  As security for the payment of all loans and other
extensions of credit or other financial accommodations now or in the future made
by the Bank to the  Borrower  and all other  liabilities  of the Borrower to the
Bank,  the  Borrower  hereby  grants  to the  Bank a  Security  Interest  in the
above-described  Collateral and all and any Proceeds  arising  therefrom and all
and any products of the Collateral.

<PAGE>

                    [The  Proceeds of the loan hereby  obtained by the Borrower
[DELETE IF          will be used to purchase the Collateral.

NOT

APPLICABLE]

     The Borrower  represents  and warrants  that it is the sole lawful owner of
the Collateral, free and clear of any liens and encumbrances,  and has the right
and power to pledge,  sell,  assign and transfer  absolute  title thereto to the
Bank and that no financing  statement  covering the  Collateral,  other than the
Bank's, is on file in any public office.

     To further secure the Liabilities,  the Borrower hereby grants, pledges and
assigns to the Bank a continuing lien, Security Interest and right of set-off in
and to all money,  securities  and all other  property of the Borrower,  and the
Proceeds thereof,  now or hereafter actually or constructively  held or received
by or for the Bank, Chase Securities Inc. or any other affiliate of the Bank for
any  purpose,   including  safekeeping,   custody,   pledge,   transmission  and
collection,  and in and to all of the Borrower's  deposits (general and special)
and credits with the Bank,  Chase  Securities Inc. or any other affiliate of the
Bank.  The  Borrower  authorizes  the Bank to  deliver  to others a copy of this
Agreement  as written  notification  of the  Borrower's  transfer  of a Security
Interest in the foregoing  property.  The Bank is hereby  authorized at any time
and from  time to time,  without  notice,  to apply  all or part of such  money,
securities, property, proceeds, deposits or credits to any of the Liabilities in
such amounts as the Bank may elect in its sole and absolute discretion, although
the  Liabilities  may then be  contingent  or  unmatured  and whether or not the
Collateral security may be deemed adequate.

     3. USE OF COLLATERAL. Until default, the Borrower may use the Collateral in
any lawful manner. If the Collateral is or is about to become affixed to realty,
the Borrower will, at the Bank's request, furnish the Bank a writing executed by
the mortgagee of the realty  whereby the mortgagee  subordinates  its rights and
priorities to the Bank's Security Interest in the Collateral.  If the Collateral
is or may become  subject to a landlord's  lien,  the Borrower  will at the Bank
request,  furnish the Bank with a landlord's waiver  satisfactory in form to the
Bank.

     4.  INSURANCE.  The  Borrower  will  have  and  maintain  insurance  on the
Collateral  until this  Agreement is  terminated  against all expected  risks to
which it is exposed,  including fire,  theft and collision,  and those which the
Bank may designate, such insurance to be payable to the Bank and the Borrower as
their  interest  may appear;  all policies  shall  provide for thirty (30) days'
written  minimum  cancellation  notice to the Bank. The Bank may act as attorney
for  the  Borrower  in  obtaining,   adjusting,  settling  and  cancelling  such
insurance.

     5. DEFAULT.  Default shall exist hereunder:  (1) if the Borrower shall fail
to pay any amount of the  Liabilities  when due or if the Borrower shall fail to
keep,  observe or perform any  provision of this  Agreement  or of any note,  or
other instrument or agreement  between the Borrower and the Bank relating to any
Liabilities  or if any default or Event of Default  specified  or defined in any
such note,  instrument or agreement shall occur; or (2) if the Borrower shall or
shall attempt to: (a) remove or allow removal of the Collateral  from the county
where the  Borrower  now resides or change the  location of its chief  executive
office or principal place of business;  (b) sell,  encumber or otherwise dispose
of the  Collateral  or any  interest  therein  or  permit  any lien or  Security
Interest (other than the Bank's) to exist thereon or therein, (c) conceal,  hire
out or let the  Collateral,  (d) misuse or abuse the  Collateral,  or (e) use or
allow the use of the Collateral in connection with any undertaking prohibited by
law; or (3) if bankruptcy or  insolvency  proceedings  shall be instituted by or
against the Borrower;  or (4) if the Collateral shall be attached,  levied upon,
seized in any legal proceedings,  or held by virtue of any lien or distress;  or
(5) if the Borrower shall make any  assignment for the benefit of creditors;  or
(6) if the Borrower  shall fail to pay promptly all taxes and  assessments  upon
the  Collateral or the use thereof;  or (7) if the Borrower shall die; or (8) if
the Bank with reasonable cause determines that its interest in the Collateral is
in jeopardy;  or (9) if the Borrower should fail to keep the Collateral suitably
insured  . In the  Event of  Default  or the  breach  of any  undertaking  of or
conditions to be performed by the  Borrower:  (1) all  Liabilities  shall become
immediately due and payable;  and (2) the Borrower agrees upon demand to deliver
the Collateral to the Bank, or the Bank may, with or without legal process,  and
with or without  previous notice or demand for  performance,  enter any premises
wherein the  Collateral may be, and take  possession of the same,  together with
anything therein, and the Bank may make disposition of the Collateral subject to
any and all  applicable  provisions  of the law.  If the  Collateral  is sold at
public  sale,  the Bank may  purchase  the  Collateral  at such sale.  The Bank,
provided  it has sent the  statutory  notice of  default,  may  retain  from the
proceeds of such sale all reasonable  costs incurred in the said taking and sale
and also, all sums then owing by the Borrower,  and any surplus of any such sale
shall be paid to the Borrower.

<PAGE>

     6. GENERAL  AGREEMENTS.  (a) The Borrower agrees to pay the costs of filing
financing  statements  and  of  conducting  searches  in  connection  with  this
Agreement. (b) The Borrower agrees to allow the Bank through any of its officers
or agents,  at all reasonable times, to examine or inspect any of the Collateral
and to examine,  inspect and make extracts from the Borrower's books and records
relating to the  Collateral.  (c) The  Borrower  will  promptly pay when due all
taxes and  assessments  upon the  Collateral or for its use of operation or upon
the proceeds thereof or upon this Agreement or upon any note or other instrument
or agreement evidencing any of the Liabilities.  (d) At its option, the Bank may
discharge taxes,  liens or Security  Interests or other encumbrances at any time
levied  or  placed  on the  Collateral,  and may pay  for  the  maintenance  and
preservation of the Collateral, and the Borrower agrees to reimburse the Bank on
demand for any payment made or any expense  incurred by the Bank pursuant to the
foregoing  authorization,   including  outside  or  in-house  counsel  fees  and
disbursements  incurred  or  expended  by  the  Bank  in  connection  with  this
Agreement.  (e) The  Borrower  hereby  authorizes  the  Bank  to file  financing
statements  and any  amendments  thereto  without the signature of the Borrower.
Such  authorization  is  limited  to  the  Security  Interest  granted  by  this
Agreement.  (f) The  Borrower  agrees  that the Bank has the right to notify (on
invoices  or  otherwise)  account  debtors  and other  obligors or payors on any
Collateral of its assignment to the Bank,  and that all payments  thereon should
be made directly to the Bank,  and that the Bank has full power and authority to
collect, compromise,  endorse, sell or otherwise deal with the Collateral on its
own name or that of the Borrower at any time. (g) The Borrower  agrees to pay or
reimburse  the Bank on  demand  for all  costs and  expenses  incurred  by it in
connection  with the  administration  and  enforcement of this Agreement and the
administration,  preservation,  protection,  collection  or  realization  of any
Collateral (including outside or in-house attorneys' fees and expenses). (h) The
Bank shall not be deemed to have waived any of its rights hereunder or under any
other  agreement,  instrument or paper signed by the Borrower unless such waiver
is in writing  and signed by the Bank.  No delay or  omission on the part of the
Bank in exercising  any right shall operate as a waiver  thereof or of any other
right.  A waiver  upon any one  occasion  shall not be  construed  as a bar or a
waiver of any right or remedy on any  future  occasion.  All of the  rights  and
remedies  of the Bank,  whether  evidenced  hereby  or by any  other  Agreement,
instrument  or  paper,  shall  be  cumulative  and may be  exercised  singly  or
concurrently.  (i)  This  Agreement  shall  be  governed  by  and  construed  in
accordance with the laws of the State of New York. (j) This  Agreement,  and the
Security Interests, obligations, rights and remedies created hereby, shall inure
to the benefit of the Bank and its  successors  and assigns and be binding  upon
the Borrower and its heirs,  executors,  administrators,  legal representatives,
successors and assigns.

<PAGE>

     7. EXECUTION BY THE BANK. This Agreement shall take effect immediately upon
execution by the  Borrower,  and the  execution  hereof by the Bank shall not be
required as a condition to the  effectiveness  of this Agreement.  The provision
for execution of this  Agreement by the Bank is only for purposes of filing this
Agreement  as a  security  agreement  under  the  Uniform  Commercial  Code,  if
execution hereof by the Bank is required for purposes of such filing.

                       P.C. Workstation Rentals, Inc.

                                 (Borrower)

By:                             /s/ David N. Salav
                               -----------------------

                       3512 Veterans Memorial Highway
                             (Number and Street)

                      Bohemia, Suffolk, New York 11716
                            (City, County, State)

Places of business in counties other than above:

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THE CHASE MANHATTAN BANK

By:                  Scott M. Creaven, Vice President
                              (Name and Title)

Address:             395 N. Service Rd, Melville, NY
                           (Number, Street, City)