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                                                                  EXHIBIT (b)(1)

                AMENDED AND RESTATED LOAN AND SECURITY Agreement

         THIS AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT  ("Agreement") is
made this 30th day of March, 2000, by and between INTERACTIVE  SYSTEMS,  INC., a
Maryland   corporation  and  NATIONAL  CONVERSION  SYSTEMS,   INC.,  a  Virginia
corporation  (collectively,  the  "Borrower")  and SANDY SPRING NATIONAL BANK OF
MARYLAND, a national banking association (the "Bank").

                                    RECITALS

         WHEREAS, Bank has previously made a loan in the principal amount of TWO
MILLION  AND  NO/100  DOLLARS  ($2,000,000.00),  to  Borrower,  evidenced  by  a
Promissory  Note (Secured  Revolving  Line of Credit)  dated July 30, 1999,  and
secured by that certain Loan and Security Agreement dated of even date therewith
by and between the Borrower and the Bank (herein the "Original Loan Documents"),
and

         WHEREAS,  Bank has agreed to make  additional  loans to Borrower to the
aggregate  principal  amount of FOUR  MILLION  SIX HUNDRED  THOUSAND  AND NO/100
DOLLARS ($4,600,000.00); AND

         WHERAS,  Bank is willing to make (and  increase) such loans by amending
and restating  the Original Loan  Documents  upon the terms and  conditions  set
forth in this Agreement.

         NOW,  THEREFORE,  in consideration  of the mutual  covenants  contained
herein, Borrower and Bank do hereby agree as follows:

1.       CONSTRUCTION AND DEFINITION OF TERMS.

         All  terms  used  herein  which are  defined  by the  Maryland  Uniform
Commercial  Code shall have the same  meanings  assigned to them by the Maryland
Uniform  Commercial Code unless and to the extent varied by this Agreement.  All
accounting  terms  not  specifically  defined  herein  shall  have the  meanings
assigned to them as determined by generally accepted accounting  principles.  In
addition to the terms elsewhere in this Agreement,  unless the context otherwise
requires,  the following terms shall have the following meanings:  1.01 "Account
Debtor"  shall  mean the  person or entity  obligated  upon a  Receivable.  1.02
"Advance"  shall mean each  disbursement  of Loan  proceeds  made by Bank.  1.03
"Banking  Day" shall mean any day that  banks in the state of  Maryland  are not
required or  permitted  to be closed.  1.04  "Borrowing  Base"  shall  mean,  as
determined  by Bank from time to time,  seventy five percent (75%) of the amount
of all billed Eligible  Receivables aged less than ninety (90) days from invoice
date. 1.05  "Certified"  shall mean that the information,  statement,  schedule,
report or other document required to be "certified" shall contain a presentation
of a duly  authorized  officer of  Borrower  that such  information,  statement,
schedule,  report or other  document  is true and  correct  and  complete.  1.06
"Closing"  shall mean the date on which  funds are first  advanced  to  Borrower
hereunder. 1.07 "Collateral" shall mean all of Borrower's Receivables, Inventory
and Equipment, all property and funds of





Borrower, both now owned and hereafter acquired,  coming into Bank's possession,
all  property  and  asserts of  Borrower  in or on which Bank has, or may in the
future  acquire or be granted,  a Lien,  whether  related or  unrelated  to this
Agreement and whether or not the obligation  secured is of the same character or
class as Borrower's obligations hereunder,  and all proceeds,  cash and noncash,
including  insurance  proceeds,  and  products of all of the  foregoing  and all
books, records and data processing materials in any form (including tapes, disks
and the like)  documenting,  describing  or in any way relating to any or all of
the foregoing,  whether in the  possession of Borrower or any other person,  and
all of Debtor's franchise rights, licenses, permits,  authorizations and general
intangibles, including, without limitation, patent rights, intellectual property
rights,  contracts  and other general  intangibles  as defined under the Uniform
Commercial Code in effect in the State of Maryland.  1.08 "Eligible Receivables"
shall  mean,  at any time,  all of the  Borrower's  unbonded  Receivables  which
contain selling terms and conditions  acceptable to Bank, except,  that, the net
amount of any  Eligible  Receivables  against  which  Borrower  may borrow shall
exclude all returns,  discounts,  credits, and offsets of any nature and, unless
otherwise agreed to by Bank in writing,  Eligible Receivables shall not include:
(a)  Receivables  with  respect to which the Account  Debtor is an  officer,  an
employee or agent of Borrower. (b) Receivables with respect to which the Account
Debtor is a  subsidiary  of, or  affiliated  with or related to  Borrower or its
shareholders,  officers,  or directors.  (c)  Receivables  with respect to which
goods are placed on  consignment,  guaranteed  sale, or other terms by reason of
which the payment by the Account Debtor may be conditional. (d) Receivables with
respect to which  Borrower  is or may become  liable to the  Account  Debtor for
goods  sold  or  services  rendered  by the  Account  Debtor  to  Borrower.  (e)
Receivables  which  are  subject  to  dispute,   counterclaim,  or  setoff.  (f)
Receivables  with respect to which the goods have not been shipped or delivered,
or the services have not been rendered,  to the Account Debtor.  (g) Receivables
with respect to which Bank, in its sole discretion,  deems the  creditworthiness
of  financial  condition  of  the  Account  Debtor  to  be  unsatisfactory.  (h)
Receivables  of any Account  Debtor who has filed or has had filed  against it a
petition in bankruptcy or an  application  for relief under any provision of any
state or federal bankruptcy,  insolvency,  or debtor-in-relief  acts; or who has
had appointed a trustee,  custodian,  or receiver for the assets of such Account
Debtor; or who has made an assignment for the benefit of creditors or has become
insolvent or fails  generally to pay its debts  (including its payrolls) as such
debts become due. (i)  Receivables  with respect to which the Account  Debtor is
the United States  government or any  department or agency of the United States.
(j)  Receivables  which have not been paid in full within  ninety (90) days from
the invoice date.  The entire  balance of the  Receivables of any single Account
Debtor will be ineligible  whenever the portion of such  Receivables  which have
not been paid





within  ninety  (90)  days from the  invoice  date is in excess of 50.00% of the
total amount  outstanding on such  Receivables.  1.09 "Equipment" shall mean all
right,  title and  interest of Borrower  in and to  equipment  of every type and
description,  now owned and hereafter acquired and wherever located,  including,
without limitation,  all machinery,  vehicles,  furniture,  furnishings,  tools,
fixtures,  and property in, on or with which any of the  foregoing may be stored
or  maintained,  materials  and  supplies,  and any  equipment  described in any
supplement  schedule  hereafter  delivered  by or on behalf of Borrower to Bank,
together with all present and future parts, additions, accessories, attachments,
accessions,  replacement  parts and  substitutions in any form whatsoever.  1.10
"Event of Default"  shall mean any of the evens  described  in Section 8 hereof.
1.11 "Indebtedness"  shall include all items which would properly be included in
the  liability  section  of a  balance  sheet or in a  footnote  to a  financial
statement,   in  accordance  with  generally  accepted  accounting   principles,
including,  without limitation,  contingent liabilities.  1.12 "Inventory" shall
mean all right, title and interest of Borrower in and to inventory of every type
and  description,  now  owned  and  hereafter  acquired  and  wherever  located,
including without limitation,  raw materials,  work in process,  finished goods,
goods  returned  or   repossessed   or  stopped  in  transit,   goods  used  for
demonstration, promotion, marketing or similar purposes, property in or on which
any of the foregoing may be stored or maintained  and all materials and supplies
usable or used or consumed in the course of Borrower's  business,  together with
all   present  and  future   substitutions,   parts,   additions,   accessories,
attachments,  accessions,  replacement  parts and additions  thereto in any form
whatsoever.  1.13 "Lien" shall mean any  statutory or common law  consensual  or
non-consensual mortgage, pledge, security interest,  encumbrance, lien, right of
setoff,  claim  or  charge  of any  kind,  including,  without  limitation,  any
conditional sole or other title retention transaction,  any lease transaction in
the nature thereof and any secured transaction under the Uniform Commercial Code
of any  jurisdiction.  1.14  "Loan",  "Loans",  "Line"  or  "Lines"  shall  mean
collectively  (a) the term loan in the amount of Six Hundred Thousand and No/100
Dollars ($600,000.00), and (b) the receivable line of credit in an amount not to
exceed Four Million and No/100 Dollars ($4,000,000.00)  (herein,  sometimes, the
"Revolving  Loan"),  each to be  established  by Bank in favor  of the  Borrower
pursuant to the terms and conditions of this  Agreement.  1.15 "Note" shall mean
collectively  (a) the  Promissory  Note  (Term)  in the  amount  of Six  Hundred
Thousand and No/100 Dollars  ($600,000.00)  (the "Equipment Term Note"), and (b)
the Amended and Restated  Promissory Note (Secured  Revolving Line of Credit) in
an amount not to exceed Four Million and No/100  Dollars  ($4,000,000.00),  (the
"Receivable Line Note"),  each dated of even date herewith,  each to be executed
and  delivered  by  Borrower  at or prior to Closing  pursuant to 5.3(a) and (b)
hereof,   and  all  renewals,   replacements   and  extensions   thereof.   1.16
"Obligations" shall include the full and punctual performance of all present and
future duties, covenants and responsibilities due to Bank by Borrower on account
of the Note,  and the Other  Agreements  and  otherwise,  all present and future
obligations  of Borrower to Bank for the payment of money under this  Agreement,
the Note, and the Other Agreements, extending to





all principal amounts, interest, late charges and all other charges and sums, as
well as all costs and expenses payable by Borrower on account of the Loans under
this  Agreement,  the  Note,  and the  Other  Agreements,  and any and all other
present and future monetary  liabilities of Borrower to Bank,  whether direct or
indirect,  contingent or  non-contingent,  matured or unmatured,  accrued or not
accrued,  related or unrelated to the Note, whether or not of the same character
or class as Borrower's Obligations on account of the Loans under this Agreement,
the Note, and the Other Agreements, including, without limitation, overdrafts in
any  checking or other  account of the  Borrower at the Bank and claims  against
Borrower acquired by assignment to Bank, whether or not security under any other
document,  instrument  or  statutory  or common  law  provision,  as well as all
renewals, refinancings, consolidations, re-castings and extensions of any of the
foregoing.  1.17 "Other  Agreements"  shall mean any and all  promissory  notes,
security   agreements,   assignments,   subordination   agreements,   pledge  or
hypothecation  agreements,   mortgages,   deeds  of  trust,  leases,  contracts,
guaranties,  instruments and documents now and hereafter  existing  between Bank
and Borrower executed and/or delivered evidencing,  guaranteeing, securing or in
any other manner  relating to any of the  Obligations.  1.18  "Permitted  Liens"
shall mean (a) Liens of the Bank,  (b) Liens for taxes and  special  assessments
not delinquent, and (c) Liens, if any, consented to by the Bank in writing. 1.19
"Person"   shall   include   natural   persons,   corporations,    associations,
partnerships,  joint ventures,  trusts, governments and agencies and departments
thereof, and every other entity of every kind. 1.20 "Receivables" shall mean all
of Borrower's present and future accounts,  contract rights, notes, instruments,
documents,  chattel paper, tax refunds, notes receivable,  drafts,  acceptances,
documents,  claims,  causes of action, all present and future rights of Borrower
to the  payment  of  money  due or to  become  due to  Borrower  for any  reason
whatsoever, whether arising out of the sale, lease or other disposition of goods
or other  property  by Borrower or under any  contract  or  agreement  to render
services of any kind or otherwise, whether or not such right to payment has been
earned by  performance,  and  howsoever  such right to payment may be evidenced,
whether by open  account,  instrument,  note draft,  chattel paper or otherwise,
together  with all other rights which  Borrower may at any time have,  by law or
agreement, against any account debtor, all rights which Borrower may at any time
have,  by law or  agreement,  against any other  obligor  obligated to make such
payment,  all goods returned,  repossessed or stopped in transit the sale, lease
or other disposition of which contributed to the creation of any Receivable, and
all rights and liens which  Borrower may at any time have,  by law or agreement,
against any property of such account  debtor or against any property of any such
other obligor,  together with all ledger sheets, files,  records,  documents and
instruments (including, without limitation, computer programs, tapes and related
electronic data processing software),  evidencing an interest in or relating to,
the  foregoing.  1.21  "Subsidiary"  shall  include any  corporation  at least a
majority  of the  outstanding  Voting  Stock of which  is  owned,  now or in the
future,  by  Borrower,  or by one of the  stockholders  of the  Borrower,  or by
Borrower,  and one or more of its  Subsidiaries.  1.22 "Voting Stock" shall mean
the shares of any class of capital stock of a corporation having ordinary voting
power to elect the directors, officers or trustees thereof, including such





shares that shall or might have voting power by reason of the  occurrence of one
or more conditions or contingencies.

2.       LOAN.

2.01 Loan Commitment.  Subject to, and in accordance with the terms,  conditions
and  provisions  of this  Agreement,  the  Bank  agrees  to make the Loan to the
Borrower. The full principal amount of the Equipment Term Note shall be advanced
by Bank to Borrower at Closing and the principal  amount of the Receivable  Line
Note shall be advanced by Bank to Borrower on a revolving  credit basis pursuant
to the terms  hereof until the earlier to occur of (a) the  respective  maturity
dates of the notes  evidencing the same, or (b) the date the Bank terminates the
Loan pursuant to the  provisions  of Section 9 hereof.  2.02 Manner of Borrowing
and  Disbursement  of Revolving  Loan.  Each Advance of account of the Revolving
Loan shall be made by the Bank to the  Borrower  no more than on the fifth (5th)
Banking Day on which Bank  actually  receives  written  notice,  if requested by
Bank,  from the Borrower  setting  forth the amount of such  Advance,  provided,
that, such written notice is actually received by Bank before 12:00 Noon Eastern
Time  (Standard or Daylight as then  applicable) on such Banking Day, or on such
later  date set  forth  in  Borrower's  notice.  Prior to  making  any  Advances
hereunder,  the Bank will  require  Borrower  to  submit  to the  Bank,  for its
approval,  a written  statement of the purpose of such Advance,  together with a
statement of contemplated  source of repayment of the same.  Notwithstanding any
other provision  contained herein or in the Note, the Bank reserves the right to
deny funding for any such request in the exercise of its sole  discretion.  Each
Advance on account of the Revolving Loan shall be credited to a banking  account
of the Borrower  with the Bank or disbursed as otherwise  instructed by Borrower
in  its  notice  requesting  such  Advance.  With  respect  to all  matters  and
transactions in connection therewith, the Borrower hereby irrevocably authorizes
the  Bank  to  accept,   rely  upon,  act  upon  and  comply  with  any  written
instructions,  requests,  confirmations,  and orders from Borrower. The Borrower
acknowledges that the transmission between the Borrower and the Bank of any such
instructions,  requests,  confirmations,  and orders from Borrower. The Borrower
acknowledges that the transmission between the Borrower and the Bank of any such
instructions,  requests,  confirmations,  and orders involves the possibility of
errors, omissions,  mistakes, and discrepancies and agree to adopt such internal
measures and operational procedures to protect its interests. By reason thereof,
the  Borrower  hereby  assumes  all risk of loss  and  responsibility  for,  and
releases and  discharges the Bank from any and all  responsibility  or liability
for and agrees to  indemnify,  reimburse on demand,  and hold the Bank  harmless
from, any and all claims, actions,  damages, losses,  liability, and expenses by
reason of,  arising  out of or in any way  connected  with or related to (a) the
Bank's accepting, relying and acting upon, complying with, or observing any such
instructions,  requests,  confirmations,  or  orders,  and (b) any such  errors,
omissions,  mistakes, and discrepancies;  provided,  that, the foregoing release
and  indemnification  shall not apply to matters  attributable  to Bank's  gross
negligence or intentional willful misconduct.  2.03 The Account.  The Bank shall
establish  and  maintain  an  account  on the books of the Bank  evidencing  the
indebtedness  of the Borrower to the Bank under the provisions of this Agreement
with  respect to the  Revolving  Loan to which (a) the amount of each  Revolving
Loan advance made by the Bank shall be debited by recording  therein on the date
of each Advance a debt entry in the amount of the  Advance,  (b) each payment on
the Revolving Loan made by the Borrower  shall be credited by recording  therein
on the date  received  a credit  entry in the  amount of such  payment,  (c) all
interest on the  Revolving  Loan not paid as and when due and  payable  shall be
debited by





                  recording therein on the date such interest becomes past due a
debit  entry  in  the  amount  of  such  interest,   (d)  all  Expense  Payments
(hereinafter  defined) not paid as and when due and payable  shall be debited by
recording  therein on the date such Expense payment becomes due a debit entry in
the amount of such  Expense  Payment,  (e) all  Liquidation  costs  (hereinafter
defined)  shall be debited by recording  therein on the date incurred the amount
of such  Liquidation  Costs, and (f) all other charges,  interest,  and expenses
chargeable by the Bank to the Borrower under this Agreement not paid as and when
due and payable shall be debited by recording  therein on the date such charges,
interest,  and  expenses  become  past due a debit  entry in the  amount of such
charges,  interest,  and  expenses.  All  credit  entries  to such  account  are
conditional  and shall be readjusted as of the date made if final payment is not
received by the Bank in cash or solvent credits. The entries made by the Bank to
such account shall  constitute prima facie evidence of the existence and amounts
of the  Borrower's  indebtedness  to the  Bank  under  the  provisions  of  this
Agreement.  3. SECURITY. 3.01 Security Interest. As security for the payment and
performance  of  all  of  the  Obligations  and  performance   under  the  Other
Agreements, Borrower hereby irrevocably and unconditionally assigns, pledges and
grants  to  Bank  a  continuing  security  interest  in the  Collateral.  Bank's
assignment,  pledge and grant is coupled with an interest and shall  continually
exist until all  Obligations  have been paid in full. If required by Bank at any
time,  Borrower  shall make  notations,  satisfactory  to Bank, on its books and
records  disclosing the existence of Bank's security interest in the Collateral.
Borrower agrees that,  with respect to the  Collateral,  Bank shall have all the
rights and  remedies  of a secured  party  under the State of  Maryland  Uniform
Commercial  Code,  Bank shall have no liability or duty,  either before or after
the  occurrence of an Event of Default  hereunder,  on account of loss or damage
to, or to collect or enforce any of its rights against,  the  Collateral,  or to
preserve  any  rights  against  account  debtors  or other  parties  with  prior
interests in the  Collateral.  3.02  Covenants  and  Representations  Concerning
Collateral. With respect to all of the Collateral,  Borrower covenants, warrants
and represents that: (a) No financing  statement  covering any of the Collateral
is on  file  in any  public  office  or land or  financing  records  except  for
financing  statements in favor of Bank and financing  statements with respect to
any Permitted  Liens.  (b) Borrower is the legal and beneficial  owner of all of
the Collateral, free and clear of all Liens, except for Permitted Liens. (c) The
security  interest granted Bank hereunder shall constitute a first Lien upon the
Collateral,  except for Permitted  Liens,  and Borrower will not,  except in the
ordinary course of business,  transfer, discount, sell or assign any interest in
the  Collateral nor permit any other Lien to be created or remain thereon except
for Permitted Liens. (d) Borrower will maintain the Collateral in good order and
condition,  ordinary wear and tear excepted,  and will use, operate and maintain
the Collateral in compliance  with all laws,  regulations  and ordinances and in
compliance with all applicable insurance requirements and regulations.  Borrower
will pay  promptly  all  taxes,  judgments  and  charges  of any kind  levied or
assessed  thereon,  unless disputed in good faith and, if requested by the Bank,
bonded off to the Banks satisfaction.





Borrower  shall  promptly  notify Bank in writing of any such  dispute,  and any
pending or  threatened  litigation  involving  the  Collateral.  Borrower  shall
promptly pay when due all  transportation,  storage,  warehousing and other such
charges and fees  affecting or arising out of or relating to the  Collateral and
shall  defend the  Collateral,  at  Borrower's  expense,  against all claims and
demands of any  persons  claiming  any  interest  in the  Collateral  adverse to
Borrower or Bank. (e) At all reasonable  times Bank and its agents and designees
may enter  Borrower's  premises  and  inspect the  Collateral  and all books and
records of Borrower  (in whatever  form)  relating to the  Collateral  or to the
finances and  operations of Borrower's  business.  (f) Borrowers  shall maintain
comprehensive  casualty  insurance  on the  Collateral,  as  may  be  reasonably
required  by the  Bank,  against  such  risks,  such  amounts,  with  such  loss
deductible  amounts with such  companies as may be required by or  acceptable to
Bank, and each such policy shall contain a clause or  endorsement,  satisfactory
to Bank, naming Bank as loss payee and a clause or endorsement,  satisfactory to
Bank,  that such  policy may not be  cancelled  or  altered  and Bank may not be
removed as loss payee without at least fifteen (15) days prior written notice to
Bank.  Borrower hereby assigns to Bank any and all proceeds of such policies and
authorizes  and  empowers  Bank to  adjust or  compromise  any loss  under  such
policies  and  to  collect  and  receive  all  such  proceeds.  Borrower  hereby
authorizes and directs each insurance  company to pay all such proceeds directly
and solely to Bank and not to Borrower and Bank jointly. Borrower authorizes and
empowers  Bank to execute  and  endorse in  Borrower's  name all proofs of loss,
drafts,  checks and any other documents  necessary to accomplish such collection
and any persons  making  payments to Bank under the terms of this  paragraph are
hereby relieved  absolutely from any obligation or  responsibility to see to the
application of any sums so paid.  After  deduction from any such proceeds of all
reasonable costs and expenses (including reasonable attorney's fees) incurred by
Bank in the collection  and handling of such  proceeds,  the net proceeds may be
applied  in whole or in part,  at Bank's  option,  either  toward  replacing  or
restoring  the  Collateral,  or as a  credit  against  such of the  Obligations,
whether matured or unmatured, as Bank shall determine in Bank's sole discretion.
(g) All information,  schedules, certificates, records and data furnished to the
Bank are true and  correct in all  material  respects  and  complete  insofar as
completeness may be necessary to give the Bank accurate knowledge of the subject
matter.  (h) All books and records of Borrower  pertaining to the Collateral are
located at 1777 N. Kent  Street,  Suite 1103,  Arlington,  Virginia  22209,  and
Borrower  will not change the  location  of such books and  records  without the
prior written consent of Bank. (i) Borrower shall do, make,  execute and deliver
all such additional,  and further acts, things, deeds,  assurances,  instruments
and documents as Bank may  reasonably  request to vest in and assure to Bank its
rights hereunder or in any of the Collateral, including, without limitation, the
execution  and delivery of financing  statements  which Bank deems  necessary or
appropriate to perfect or continue the security  interest  granted  herein,  and
Borrower agrees to pay all taxes,  fees and costs  (including  attorney's  fees)
paid or  incurred  by Bank in  connection  with the  preparation  and  filing or
recordation thereof. 4.





         REPRESENTATIONS AND WARRANTIES.

         To induce Bank to enter into this  Agreement,  Borrower  represents and
warrants  to Bank  that  as of the  Closing:  4.01  Good  Standing.  Interactive
Systems, Inc., is duly organized and existing in good standing under the laws of
the state of Maryland,  National Conversion Systems,  Inc. is duly organized and
existing in good standing under the laws of the  Commonwealth of Virginia,  each
has the  power to own its  property  and to carry  on its  business  and is duly
qualified to do business and is in good standing in each  jurisdiction  in which
the  transaction  of its  business  makes  such  qualification  necessary.  4.02
Authority.  Borrower has full power and authority to enter into this  Agreement,
to make the  borrowing  hereunder,  to execute  and deliver  all  documents  and
instruments required hereunder and to incur and perform the Obligations provided
for  herein  and in the Note,  all of which  have been  duly  authorized  by all
necessary and proper  corporate and other action,  and no consent or approval of
any person,  including,  without  limitation,  stockholders  of Borrower and any
public authority or regulatory body, which has not been obtained, is required as
a condition to the validity or  enforceability  hereof or thereof.  4.03 Binding
Agreements.  This  Agreement  has been duly and  properly  executed by Borrower,
constitutes  the valid and legally  binding  obligation of Borrower and is fully
enforceable  against Borrower in accordance with its terms.  4.04 No Conflicting
Agreements.  The execution and  performance by Borrower of this  Agreement,  the
borrowing  hereunder,  and Borrower's  execution and delivery of and performance
under the Note will not (a) violate (i) any provision of law, any order, rule or
regulation  of any court or other  agency of  government;  (ii) any award of any
arbitrator,  (iii) the charter or By-Laws of  Borrower,  or (iv) any  indenture,
contract,  agreement,  mortgage,  deed of  trust or  other  instrument  to which
Borrower is a party or by which it or any of its property is bound, or (b) be in
conflict with, result in a breach of or constitute (with due notice and/or lapse
of time) a  default  under,  any such  award,  indenture,  contract,  agreement,
mortgage,  deed of trust or other  instrument,  or  result  in the  creation  or
imposition  of any Lien upon any of the  property  or assets of  Borrower.  4.05
Litigation.  There  are no  undisclosed  judgments,  claims,  actions,  suits or
proceedings  pending or, to the  knowledge  of Borrower,  threatened  against or
affecting  Borrower or its  properties,  at law or in equity or before or by any
federal, state, municipal or other governmental department,  commission,  board,
bureau,  agency or  instrumentality,  which may result in any  material  adverse
change in the business,  operations,  prospects,  properties or assets or in the
condition,  financial or  otherwise,  of  Borrower,  and Borrower is not, to its
knowledge,  in default with respect to any judgment,  order,  writ,  injunction,
decree,  rule or regulation of any court or federal,  state,  municipal or other
governmental department,  commission,  board, bureau, agency or instrumentality,
domestic or foreign,  which would have a material  adverse  effect on  Borrower.
4.06  Financial  Condition.  The  financial  statements  of Borrower  heretofore
delivered  to Bank are  complete  and  correct,  fairly  present  the  financial
condition  of Borrower  and have been  prepared  in  accordance  with  generally
accepted  accounting  principles  applied on a  consistent  basis.  There are no
liabilities of Borrower,  direct or indirect, fixed or contingent as of the date
of such statements which are not reflected therein. 4.07





                  Taxes. Except as otherwise disclosed to the Bank, Borrower has
paid or caused to be paid all federal,  state and local taxes to the extent that
such taxes have become due. Borrower has filed or caused to be file all federal,
state and local tax returns  which are  required to be filed by  Borrower.  4.08
Titles to  properties.  Borrower  has good and  marketable  title to all or (its
properties and assets  (including the  Collateral) and all of the properties and
assets of Borrower are free and clear of Liens,  except to permitted  Liens, and
has made no assignments thereof except to Bank. 4.09 Subsidiaries.  Borrower has
no Subsidiaries other than Subsidiaries  previously  disclosed to the Bank. 4.10
Licenses and Permits.  Borrower  has duly  obtained and now holds all  licenses,
permits,  certifications,  approvals and the like required by federal, state and
local laws of the jurisdiction in which Borrower  conducts its business and each
remains  valid and in full  force and  effect  and  Borrower  has paid all fees,
taxes,  assessments  and other charges  necessary to maintain same. 4.11 Certain
Indebtedness.  There is no  Indebtedness  of  Borrower  owing  to any  employee,
officer,  stockholder  or  director  of Borrower  other than  accrued  salaries,
commissions  and the like and any  Indebtedness  subordinated to the Obligations
pursuant hereto. 4.12 Broker's or Finder's Commissions.  No broker's or finder's
fee or commission  is or will be payable in connection  with the issuance of the
Note  or  otherwise  in  connection  with  this  Agreement  or the  transactions
contemplated  hereby,  and Borrower  agrees to save harmless and indemnify  Bank
from and against any claim, demand,  action,  suit,  proceeding or liability for
any such fee or  commission.  4.13  Outstanding  Indebtedness.  Borrower  has no
outstanding Indebtedness except as permitted by Subsection 7.01 hereof and there
exists no  default  under  the  provisions  of any  instrument  evidencing  such
Indebtedness or of any agreement relating thereto. 4.14 No Adverse Change. There
has been no material  adverse  change in the  business,  properties or condition
(financial or otherwise) of the Borrower since the date of the latest  financial
statements  referred to in Section 6.01, below.  4.15 Use of Loan Proceeds.  The
proceeds  of the Loan  shall be used  solely  for  acquiring  or  carrying  on a
business  or  commercial  enterprise.  4.16 No  Default.  No  Event  of  Default
(hereinafter  defined),  and no event  which,  with notice or passage of time or
both would constitute an Event of Default, has occurred hereunder. 5. CONDITIONS
OF LENDING.

               Bank shall have no obligation to make any Advance of the proceeds
               of the Loan unless  each of the  following  conditions  precedent
               shall  be  satisfied  as  of  the  time  of  such  Advance:  5.01
               Representation and Warranties. Bank shall be

fully satisfied that all covenants,  representations and warranties set forth in
this  Agreement are true and correct on and as of such time with the same effect
as though such covenants,  representation and warranties had been made on and as
of such time. 1.01





                                                       -10-

5.02  Event of  Default.  No Event of  Default or event  which,  with  notice or
passage  of time or  both,  would  constitute  an Event of  Default  shall  have
occurred  hereunder.  5.03  Documents.  There shall have been delivered to Bank,
fully completed and duly executed (when  applicable),  the following  documents,
the terms of which are hereby  specifically  incorporated herein by reference as
though fully set forth:  (a) The  Receivable  Line Note.  (b) The Equipment Term
Note.  (c) The  Financing  Statements.  (d) The  Amended and  restated  Guaranty
Agreement.  (e)  The  Subordination  Agreement.  (f)  Certificate  of  Corporate
Resolutions of the Secretary of the Borrower. (g) Evidence fully satisfactory to
Bank and Bank's counsel that all loss payee clauses or  endorsements in favor of
Bank  required  pursuant to the Other  Agreements  are in effect,  together with
copies  of  all  insurance  policies  and  endorsements.   5.04  Borrowing  Base
Certificate;  Aged Receivable;  Aged Payables.  At Closing, at the time of every
subsequent advance hereunder, and if no advance is requested hereunder,  then on
a monthly basis, if requested by Bank, Borrower shall submit to the Bank for its
approval,  a completed "Borrowing Base Certificate" in the form attached to this
Loan Agreement.  In addition, the Borrower shall furnish the Bank within fifteen
(15)  days  after  the end of each  calendar  month,  an  aged  analysis  of all
outstanding Receivables,  aged less than ninety (90) days from invoice date, and
all  outstanding  accounts  payable,  in form and substance  satisfactory to the
Bank.  Any  provision   contained   herein  or  in  the  Note  to  the  contrary
notwithstanding,  the Bank  will not  permit  advances  under the Line to exceed
seventy-five percent (75%) of the amount of all billed Eligible Receivables aged
less than ninety (90) days from invoice date. 6. AFFIRMATIVE COVENANTS.

         Borrower  covenants  and  agrees  with  Bank  that,  until  all  of the
Obligations have been paid in full, Borrower and its Subsidiaries, if any, will:

6.01     Financial Reporting Requirements.
Furnish to Bank:
(a)      As soon as available, but in

no event more than forty-five (45) days after the end of each monthly accounting
period of Borrower, (i) a statement of consolidating and consolidated income and
retained earnings and changes in consolidated financial position of Borrower for
such  period  and for the  period  from the  beginning  of the  current  year of
Borrower to the end of such period, and a consolidating and consolidated balance
sheet of Borrower  and its  Subsidiaries,  if any, as at the end of such period,
setting  forth in each case in  comparative  form figures for the  corresponding
periods  in the  preceding  fiscal  year of  Borrower,  all in form  and  detail
satisfactory  to Bank,  which fairly  represents the financial  condition of the
Borrower,   certified  by  the  principal  financial  officer  of  Borrower  and
accompanied  by a  certificate  of that  officer  stating  whether any event has
occurred  which  constitutes  an Event of Default or which could  constitute  an
Event of Default (a)





                                                       -20-

with the giving of notice and/or the lapse of time and, if so, stating the facts
with respect thereto, and (ii) an aged analysis of all outstanding  Receivables,
in form and substance  satisfactory to the Bank. (b) As soon as available and in
any event within ninety (90) days after the end of each fiscal year of Borrower,
a statement of consolidating  and consolidated  income and retained earnings and
changes in consolidated financial position of Borrower and its Subsidiaries,  if
any,  for such year,  and a  consolidating  and  consolidated  balance  sheet of
Borrower and its Subsidiaries, if any, as at the end of such year, setting forth
in each case in comparative form corresponding  figures for the preceding fiscal
year of  Borrower,  all in form and  detail  satisfactory  to Bank,  audited  by
independent certified public accountants satisfactory to Bank in accordance with
generally accepted accounting  principles  consistently applied, and accompanied
by a Certificate of the Chief Financial  Officer of Borrower stating whether any
event  has  occurred  which  constitutes  an Event  of  Default  or which  could
constitute  an Event of Default  with the  giving of notice  and/or the lapse of
time and, if so,  stating  the facts with  respect  thereto;  and (c) Such other
information,  tax returns,  reports or  statements  concerning  the  operations,
business affairs and/or financial condition of Borrower and its Subsidiaries, if
any, as Bank may  reasonably  request  from time to time.  6.02  Taxes.  Pay and
discharge all taxes,  assessments and  governmental  charges upon Borrower,  its
income and properties prior to the date on which penalties are attached thereto.
6.03  Continuation  of Business and Compliance  with Laws.  Continue its and its
Subsidiaries',  if any,  business  operations as now being  conducted and comply
with  all  applicable  federal,   state  and  local  laws,  rules,   ordinances,
regulations and orders. 6.04 Litigation.  Promptly notify Bank in writing of any
action,  suit  or  proceeding  at law  or in  equity  by or  before  any  court,
governmental agency or instrumentality which could result in any material change
in  the  business,  operations,  prospects,  properties  or  assets  or  in  the
condition,  financial or otherwise,  of Borrower and its  Subsidiaries,  if any.
6.05  Extraordinary  Loss.  Promptly notify Bank in writing of any event causing
extraordinary  loss or  depreciation  of the value of any of  Borrower's  or its
Subsidiaries', if any, assets and the facts with respect thereto. 6.06 Books and
Records/Depository  Accounts.  Keep and  maintain  proper and current  books and
records  which fairly  represents  the  financial  condition of the Borrower and
permit  access  to Bank  to,  reproduction  by Bank of and  copying  (all at the
Borrower's  expense) by Bank from, such books and records during normal business
hours.  Borrower will maintain its primary deposit  relationship with Bank until
the obligations are repaid in full. 6.07 Maintenance of Properties. Maintain all
properties  and  improvements  necessary  to the  conduct of  Borrower's  or its
Subsidiaries',  if any,  business in good working order and condition,  ordinary
wear and tear  excepted,  and cause  replacements  and  repairs  to be made when
necessary for the proper conduct of its business. 6.08 Patents, Franchises, etc.
Maintain, preserve and protect all licenses, patents, franchises, trademarks and





trade names of Borrower and its Subsidiaries, if any, or licenses by Borrower or
any  Subsidiary,  which are necessary to the conduct of the business of Borrower
or its  Subsidiaries,  if any, as now  conducted,  free of any conflict with the
rights of any other  person.  6.09  Insurance.  Maintain  with  insurers  and in
amounts  satisfactory  to Bank such  insurance  against such risks and with such
loss  deductible  amounts  as  may  be  reasonably  required  by  or  reasonably
acceptable to Bank.  6.10  Evidence of  Insurance.  Deliver to Bank from time to
time  as  requested,  and  periodically  if  Bank  shall  so  require,  evidence
reasonably  satisfactory to Bank that all insurance and endorsements required by
the Bank are in effect.  6.11 Financial  Information.  Deliver to Bank, promptly
upon  request,  and  periodically  if Bank  shall  so  require,  any  reasonable
information,  statements or reports concerning Borrower's and its Subsidiaries',
if any,  business,  financial  affairs or any other  matter or matters as may be
requested by Bank,  including,  without limitation,  copies of federal and state
tax returns of Borrower and its Subsidiaries,  if any. 6.12 Further  Assurances.
The Borrower shall promptly, upon request, execute,  acknowledge and deliver any
financing  statement,   endorsement,   renewal,   affidavit,  deed,  assignment,
continuation statement, security agreement, certificate or other document as the
Bank may reasonably require in order to perfect,  preserve,  maintain,  protect,
continue  or  extend  the  lien or  security  interest  to the Bank  under  this
Agreement  and its  priority.  The Borrower  shall pay to the Bank on demand all
taxes, costs and expenses (including,  but not limited to, reasonable attorney's
fees)  incurred  by the  Bank in  connection  with the  preparation,  execution,
recording  and filing of any such document or  instrument  mentioned  aforesaid.
6.13 Borrowing Base Certificate.  The Borrower shall submit completed  Borrowing
Base  Certificates  to Bank each month  (together  with an aged  analysis of all
outstanding  Receivables  and accounts  payable) by the tenth (10th) day of each
calendar month.  6.14 Borrowing Base. In the event that the principal  amount of
the Receivable Line Note ever exceeds the Borrowing Base, as determined by Bank,
Borrower will  immediately  curtail the principal  amount of the Receivable Line
Note on Bank's  demand  so that it does not  exceed  the  Borrowing  Base.  6.15
Financial Covenants. (a) Borrower's cash flow shall be sufficient to service all
debt  of the  Borrower  at the end of each of  Borrower's  fiscal  quarters,  as
properly  reflected  in the  financial  statements  of Borrower  for such fiscal
quarter  approved  by  Bank,  by a ratio  of  1.20 to  1.00.  (b) The  ratio  of
Borrower's  current  assets to current  liabilities,  each as  determined by the
Bank, at the end of each of its fiscal  quarters,  as properly  reflected in the
financial  statements  of Borrower  for such fiscal  quarters  approved by Bank,
shall not be less than 1.10 to 1.00. (c) Borrower's  debt-to-worth  ratio at the
end of  each  of  Borrower's  fiscal  quarters,  as  properly  reflected  in the
financial statements of Borrower for such fiscal quarter approved by Bank, shall
not be greater than 3.00 to 1.00. The ratio, as determined by the Bank, shall be
defined as total liabilities





divided by  shareholders  equity  (which may include  subordinate  Borrower debt
payable to the shareholders of the Borrower).

7.       NEGATIVE COVENANTS.

                  Borrower covenants and agrees with Bank that, until all of the
Obligations have been paid in full,  Borrower will not,  directly or indirectly,
without Bank's prior written consent:  7.01 Indebtedness.  Create, incur, assume
or permit to exist any Indebtedness except (a) Indebtedness to Bank, (b) current
trade  Indebtedness,  and trade  Indebtedness  incurred in the normal  course of
business,  (c)  any  Indebtedness  specifically  permitted  hereunder,  and  (d)
Indebtedness  which shall be  approved in advance by Bank in writing,  in Bank's
sole discretion,  and if required by Bank,  subordinated to all Obligations by a
written agreement satisfactory in form and substance to Bank and Bank's counsel.
7.02 Liens.  Create,  incur, assume or permit to exist,  directly or indirectly,
any Lien upon any of  Borrower's  properties  or assets,  now owned or hereafter
acquired by Borrower,  other than Permitted Liens. 7.03 Merger,  Sale of Assets,
Etc.  Enter into or be a party to any  merger or  consolidation;  sell,  assign,
transfer,  convey  or lease  all or any  part of its  property  or any  interest
therein  except in the  ordinary  course  of  Borrower's  business  as now being
conducted;  purchase or otherwise acquire all or substantially all of the assets
of any other  person,  or any  shares of stock of, or similar  interest  in, any
other person.  7.04  Guarantees.  Guarantee or otherwise in any way become or be
responsible  for  Obligations or  Indebtedness  of any other person,  whether by
agreement to purchase the Indebtedness of any other person,  or by agreement for
the furnishing of funds to any other person for the purchase of goods,  supplies
or services, or by way of stock purchase, capital contribution,  advance or loan
for the purpose of paying or discharging  Indebtedness  of any other person,  or
otherwise,   except  that  Borrower  may  endorse  negotiable   instruments  for
collection  in the  ordinary  course  of  business.  7.05  Fiscal  Year.  Change
Borrower's  fiscal  year.  7.06  Loans.  Make or permit to exist any loan to any
person. 7.07 Subsidiaries.  Form or acquire any Subsidiaries,  without the prior
written consent of the Bank. 7.08 Change of Name. Change the name of Borrower or
any  Subsidiary  of Borrower.  7.09 Change of  Management.  Change the person(s)
controlling the management and/or day to day activities of Borrower.  7.10 Trade
Names.  Use any trade name other than  Borrower's true corporate name nor permit
any  Subsidiary  of Borrower to use any trade name other than such  Subsidiary's
true and corporate name. 7.11 Other Agreements. Borrower will not enter into any
agreement or  undertaking  containing  any provision  which would be violated or
breached by performance of its obligations hereunder.






7.12 Borrowing Base. At no time shall the outstanding  principal  balance of the
Receivable Line Note exceed the Borrowing Base, as determined by Bank.

8.       EVENTS OF DEFAULT.

         The  occurrence  of any  one or  more  of the  following  events  shall
constitute an "Event of Default": (a) Any representation of warranty made herein
in  any of the  Other  Agreements  or in  any  statement,  report,  certificate,
opinion,  financial  statement or other document furnished or to be furnished in
connection  with  this  Agreement  or the  Other  Agreements  shall  be false or
misleading  in any material  respect.  (b) Failure of Borrower to pay any of the
Obligations,  including,  without  limitation,  any  sum  due  Bank  under  this
Agreement,  or any of the Other  Agreements,  when and as the same shall  become
due, whether at the due date thereof,  by demand,  by acceleration or otherwise.
(c)  Default by Borrower  with  respect to any  Indebtedness  of Borrower to any
person or with  respect to any Lien or document  securing  any  Indebtedness  of
Borrower.  (d) Failure of Borrower or any other person to observe or perform any
warranty,  covenant,  condition  or  agreement  to be observed or  performed  by
Borrower  or  such  other  person  under  this  Agreement  or any  of the  Other
Agreements.  (e) If  Borrower,  any  Subsidiary  or any  guarantor of any of the
Obligations  shall (i) admit in writing its  insolvency  or its inability to pay
generally  its debts as they  mature,  (ii) make a  general  assignment  for the
benefit of  creditors,  (iii)  commence a case under or  otherwise  seek to take
advantage of any bankruptcy,  reorganization,  insolvency, readjustment of debt,
dissolution  or  liquidation  law,  statute  or  proceeding,  or (iv) by any act
indicate its consent to,  approval of or  acquiescence in any such proceeding or
the  appointment  of any receiver of or trustee for Borrower,  any Subsidiary or
any such  guarantor or a substantial  part of its  property,  or suffer any such
receivership,  trusteeship or proceeding to continue undismissed for a period of
sixty (60) days. (f) If Borrower,  any Subsidiary or any guarantor of any of the
Obligations  becomes a debtor in any case under any chapter of the United States
Bankruptcy  Code,  and if the petition in Bankruptcy  shall not be discharged or
dismissed within sixty (6) days after the date on which such petition was filed.
(g) Entry of any order, judgment or decree for the dissolution of Borrower,  any
Subsidiary  or any  guarantor  of any of the  Obligations  that is not a natural
person.  (h) Entry of any  judgment  against  Borrower,  any  Subsidiary  or any
guarantor  of any of the  Obligations,  which  judgement  shall  not  have  been
discharged  or  execution  thereof  stayed  within  thirty (30) days after entry
thereof or  discharged  within the thirty (30) days after the  expiration of any
such stay, if such judgment is not fully covered by applicable  insurance (which
shall not  include  any  bonding or other  arrangement  with which  Borrower,  a
Subsidiary or such guarantor may be liable for  indemnification  to any extent).
(i) If Borrower, any subsidiary or any guarantor of any of the Obligations shall
be enjoined or restrained in any manner from conducting its business in whole or
in part and Bank shall determine, in its reasonable discretion, that the same





materially  impairs any of the  Collateral of the prospect for full and punctual
payment of all of the obligations. (j) If any assets of Borrower, any Subsidiary
or any  guarantor  of any of the  Obligations  shall be  attached,  levied upon,
seized or  repossessed  or come into the  possession  of a trustee,  receiver or
other  custodian  which is not  discharged  within thirty (30) days. (k) If Bank
shall determine, in its reasonable discretion,  that any material adverse change
has  occurred  in  the  value  of  the  Collateral  or in  Borrower's  financial
condition;  or if Bank believes the prospect of payment of the  Indebtedness  is
impaired; or if Bank, in good faith, deems itself insecure. (l) If Borrower, any
Subsidiary  or  any  guarantor  of any of the  Obligations  shall  be or  become
insolvent or unable to pay its debts generally as they mature. (m) If there is a
change in  ownership  of thirty  percent  (30%) or more of the  common  stock of
Borrower.  9. RIGHTS AND  REMEDIES.  9.01 Rights and Remedies of Bank.  Upon the
occurrence of an Event of Default, Bank may, without notice or demand,  exercise
in any jurisdiction in which enforcement  hereof is sought, the following rights
and  remedies,  in addition to the rights and remedies of a secured  party under
the Uniform  Commercial Code and all other rights and remedies available to Bank
under  applicable  law,  all such  rights  and  remedies  being  cumulative  and
enforceable  alternatively,  successfully,  successively  or  concurrently:  (a)
Declare  the Note,  all  Interest  accrued  and  unpaid  thereon,  and all other
Obligations  to be  immediately  due and  payable  and the same shall  thereupon
become immediately due and payable without  presentment,  demand or protest, all
of  which  are  hereby  expressly  waived.   (b)  Institute  any  proceeding  or
proceedings to enforce the Obligations and any Lien of Bank. (c) Take possession
of the Collateral,  and for that purpose,  so far as Borrower may give authority
therefor,  enter upon the premises on which the  Collateral  or any part thereof
may be situated and remove the same  therefrom  without any  liability for suit,
action or other proceeding by Borrower,  BORROWER and its SUBSIDIARIES,  if any,
HEREBY  WAIVING ANY AND ALL RIGHTS TO PRIOR NOTICE AND TO JUDICIAL  HEARING WITH
RESPECT TO  REPOSSESSION  OF  COLLATERAL,  and require  Borrower,  at Borrower's
expense,  to assemble and deliver the Collateral to such place or places as Bank
may designate.  (d) Operate,  manage and control the  Collateral,  or permit the
Collateral or any portion thereof to remain idle, or store the same, and collect
all rents and revenues therefrom and sell otherwise dispose of any or all of the
Collateral  (including,  without  limitation,  toll,  transfer or  reassign  any
license) upon such terms and under such  conditions  at Bank, in its  reasonable
discretion,  may  determine,  all without any notice or demand,  and purchase or
acquire any of the Collateral at any such sales or other disposition, all to the
extent  permitted  by  applicable  law.  (e) With  respect  to any  instruments,
accounts,   contract   rights  or  other  debts   payable  to  Borrower  or  its
Subsidiaries,  if any, securing the Obligations,  notify any account debtors and
other obligors to make payments thereon





directly  to Bank,  take  control  of the cash and  non-cash  proceeds  thereof,
demand,  collect,  sue for and  receive  any money or  property at any time due,
payable or receivable on account thereof,  compromise and settle with any person
liable  thereon,  and extend the time of payment or  otherwise  change the terms
thereof,  without incurring liability or responsibility to Borrower,  any of its
Subsidiaries or any guarantor therefor.  9.02 Power of Attorney.  Effective upon
the occurrence of an Event of Default,  Borrower and its  Subsidiaries,  if any,
hereby  designate  and appoint  Bank and its  designees as  attorney-in-fact  of
Borrower  and  its  Subsidiaries,   if  any,   irrevocably  and  with  power  of
substitution,  with authority to receive, open and dispose of all mail addressed
to Borrower, to notify the postal authorities to change the address for delivery
of mail  addressed  to  Borrower  and its  Subsidiaries,  if any,  to such other
address as Bank designates; to endorse Borrower's and its Subsidiaries,  if any,
name on any notes,  acceptances,  checks,  drafts, money orders,  instruments or
other  evidences  of payment or  proceeds of the  Collateral  that may come into
Bank's possession; to sign Borrower's and its subsidiaries,  if any, name on any
invoices,  documents,  drafts  against and  notices to account  debtors or other
obligors of Borrower,  assignments and requests for verification of accounts; to
execute any  endorsements,  assignments,  or other  instruments of conveyance or
transfer;  to adjust and  compromise  any claims under  insurance  policies;  to
execute  releases;  and to perform all other acts  necessary and  advisable;  in
Bank's sole  discretion,  to carry out and enforce this  Agreement and the other
Agreements.  All acts of said  attorney or  designee  are hereby  rectified  and
approved by Borrower and its Subsidiaries, if any, any said attorney or designee
shall not be liable for any acts of  commission or omission nor for any error of
judgment  or  mistake  of fact or law,  except  for  gross  negligence,  willful
misconduct or bad faith.  This Power of Attorney is coupled with an interest and
is irrevocable so long as any of the Obligations remain unpaid or unperformed or
there  exists any  commitment  of Bank to Borrower  which could give rise to any
Obligations. 9.03 Cumulative Nature of Remedies. Each right, power and remedy of
Bank shall be cumulative and  concurrent,  and recourse to one or more rights or
remedies shall not constitute a waiver of any other right,  power or remedy.  It
is mutually agreed that commercial reasonableness and good faith require Bank to
give  Borrower no more than five (5) days prior  written  notice of the time and
place of any public disposition of the Collateral or of the time after which any
private  disposition  or any  other  intended  disposition  is to be made.  9.04
Liquidation  Costs. The Borrower shall reimburse and pay to the Bank upon demand
all costs and expenses (the "Liquidation Costs"), including, without limitation,
attorneys fees and expenses,  advanced, incurred by, or on behalf of the Bank in
collecting and enforcing the its rights and remedies hereunder.  All Liquidation
Costs shall bear  interest  payable by the Borrower to the Bank upon demand from
the date advanced or incurred until paid in full at a per annum rate of interest
equal at all times to the then highest rate of interest charged on the principal
of the note,  plus two percent  (2%) per annum.  9.05 Expense  Payments.  If the
Borrower shall fail to make any payment or otherwise  fail to perform,  observe,
or  comply  with  any of  the  conditions,  covenants,  terms,  stipulations  or
agreements  contained  herein,  or  in  any  of  the  documents  evidencing  the
obligations,  the Bank without notice to or demand upon the Borrower and without
waiving or releasing any  obligation or Event of Default may (but shall be under
no obligation to) at any time thereafter make such payment or





perform  such act for the account and at the  expense of the  Borrower,  and may
enter upon any  premises  of the  Borrower  for that  purpose  and take all such
action  thereon  as the Bank may  consider  necessary  or  appropriate  for such
purpose.  All sums so paid or  advanced  by the Bank (the  "Expense  Payments"),
together with interest thereon from the date paid,  advanced,  or incurred until
repaid in full at a per annum  rate of  interest  equal at all times to the then
highest  rate of interest  charged on the Note plus two percent  (2%) per annum,
shall  be  paid by the  Borrower  to the  Bank  upon  demand  by the  Bank.  10.
mISCELLANEOUS.  10.01  Performance  for  Borrower.  Borrower  agrees  and hereby
authorizes  that Bank may,  in Bank's  sole  discretion,  but Bank  shall not be
obligated  to,  advance  funds on behalf of  Borrower  without  prior  notice to
Borrower, in order to insure Borrower's compliance with any covenant,  warranty,
representation or agreement of Borrower made in or pursuant to this Agreement or
any of the  Other  Agreements,  to cover  overdrafts  in any  checking  or other
accounts  of Borrower at Bank or to preserve or protect any right or interest of
Bank in the  Collateral  or under or  pursuant to this  Agreement  or any of the
Other  Agreements,  including without  limitation,  the payment of any insurance
premises or taxes and the  satisfaction or discharge of any judgment or any Lien
upon the Collateral or other property or assets of Borrower;  provided, however,
that the making of any such  advance by Bank  shall not  constitute  a waiver by
Bank of any Event of Default  with  respect  to which  such  advance is made nor
relieve  Borrower of any such Event of Default.  Borrower shall pay to Bank upon
demand  all such  advances  made by Bank with  interest  thereon at the rate and
determined in the manner  provide in the Note. All such advances shall be deemed
to be included in the Obligations and secured by the security  interest  granted
Bank  hereunder.  10.02  Expenses.  Whether  or  not  any  of  the  transactions
contemplated  hereby  shall be  consummated,  Borrower  agrees to pay to Bank at
Closing  or 30 days  after the  execution  and  delivery  hereof,  whichever  is
earlier,  all expenses of Bank  (including  the  reasonable  fees and reasonable
expenses of its counsel) in connection  with the  preparation  of this Agreement
and all documents and instruments referred to herein and all expenses of Bank in
connection  with the  filing or  recordation  of all  financing  statements  and
instruments  as may be  required by Bank at the time of, or  subsequent  to, the
execution of this  Agreement,  including,  without  limitation,  all documentary
stamps,  recordation  of any  document or  instrument  in  connection  herewith.
Borrower  agrees  to save  harmless  and  indemnify  Bank from and  against  any
liability  resulting  from the failure to pay any required  documentary  stamps,
recordation and transfer taxes,  recording costs, or any other expenses incurred
by Bank in connection  with this  Agreement.  This provisions of this Subsection
10.02 shall survive the execution and delivery of this Agreement and the payment
of all other  Obligations.  10.03  Applications of Collateral.  Except as may be
otherwise,  specifically  provided in Agreement,  all Collateral and proceeds of
Collateral  coming into Bank's  possession  may be applied by Bank to any of the
Obligations,  whether matured or unmatured,  as Bank shall determine in its sole
discretion.  10.04  Indemnification  by Borrower.  The Borrower hereby agrees to
indemnify and hold harmless the Bank from and against all  liabilities,  claims,
demands, and costs,  including without limitation,  reasonable  attorney's fees,
arising out of or in connection  with the  Collateral,  except  arising from the
Banks gross negligence, willful misconduct or bad faith. 10.05





                  Receipt  Sufficient  Discharge to Purchaser.  Upon any sale or
other disposition of the Collateral or any part thereof, the receipt of the Bank
or any  other  person  making  the sale or  disposition  shall  be a  sufficient
discharge to the purchaser for the purchase money,  and such purchaser shall not
be  obligated  to see to the  application  thereof.  10.06  Waivers by Borrower.
Borrower  hereby waives,  to the extent the same may be waived under  applicable
law:  (a) All claims,  causes of action and rights of Borrower  against  Bank on
account of actions  taken or not taken by Bank in the exercise of Bank's  rights
or remedies  hereunder or under the Other  Agreements,  except  arising from the
Banks gross negligence, willful misconduct, bad faith, or in violation of any of
the provisions  hereof, or in the Other  Agreements.  (b) All claims of Borrower
for failure of Bank to comply with any  requirements  of applicable law relating
to  enforcement  of  Bank's  rights  or  remedies  hereunder  or under the Other
Agreements;  (c) All  rights of  redemption  of  Borrower  with  respect  to the
Collateral;  (d)  In  the  event  Bank  seeks  to  repossess  any  or all of the
Collateral  by judicial  proceedings,  any bond(s) or demand(s)  for  possession
which  otherwise  may be  necessary  or required;  (e)  Presentment,  demand for
payment,  protest  and all  exemptions;  (f)  Trial  by jury  in any  action  or
proceeding of any kind or nature in  connection  with any of  Obligations,  this
Agreement or any of the other Agreements; (g) Settlement,  compromise or release
of the Obligations of any person primarily or secondarily liable upon any of the
Obligations; (h) Substitution, impairment, exchange or release of any collateral
security for any of the Obligations.

         Borrower  agrees that Bank may exercise any or all of its rights and/or
remedies  hereunder  and under the Other  Agreements  without  resorting  to and
without regard to any  collateral  security or sources of liability with respect
to any of the  Obligations.  10.07 Waivers by Bank.  Neither any failure nor any
delay on the part of Bank in  exercising  right,  power or remedy  hereunder  or
under any of the Other Agreements shall operate as a waiver thereof, nor shall a
single or  partial  exercise  thereof  preclude  any other or  further  exercise
thereof or the  exercise  of any other  rights,  power or remedy.  10.08  Bank's
Records.  Every  statement  of account  or  reconciliation  rendered  by Bank to
Borrower with respect to any of the Obligations  shall be presumed  conclusively
to be correct and shall  constitute an account  stated between Bank and Borrower
unless,  within 30 Banking Days after any such statement or reconciliation shall
have been mailed,  postage  prepaid,  to Borrower,  Bank shall  receive  written
notice of specific objection thereto.  10.09  Modifications.  No modification or
waiver  of any  provisions  of this  Agreement,  the  Note  or any of the  Other
Agreements, and no consent to any departure by Borrower





therefrom,  shall in any event be effective unless the same shall be in writing,
and then such waiver or consent shall be effective only in the specific instance
and for the purpose for which given. No notice to or demand upon Borrower in any
case shall  entitle  Borrower  to any other or  further  notice or demand in the
same, similar or other  circumstances.  10.10 Bank's Setoff. Bank shall have the
right, in addition to all other rights and remedies  available to it, to set off
against  any or all of the  Obligations  and  debt  owing to  Borrower  by Bank,
including, without limitation, any funds in any checking or other account now or
hereafter  maintained by Borrower at Bank. Borrower hereby confirms Bank's right
to banker's lien and setoff,  and nothing in this  Agreement or any of the Other
Agreements  shall be deemed a waiver or prohibition of Bank's rights of banker's
lien or setoff.  10.11 Notices.  Any notice or other communication in connection
with this Agreement, if by registered or certified mail, shall be deemed to have
been given when received by the party to whom  directed,  or, if by mail but not
registered or certified,  when deposited in the mail, postage prepaid,  provided
that any such notice or  communication  shall be  addressed to a party hereto as
provided  below (or at such other address as such party shall specify in writing
to the other parties hereto): (a) If to Borrower,  at 1777 N. Kent Street, Suite
1103, Arlington, Virginia 22209. (b) If to Bank, at 17801 Georgia Avenue, Olney,
Maryland 20832.  10.12  Applicable Law. The performance and construction of this
Agreement,  the Note and the Other  Agreements shall be governed by the internal
laws of the State of Maryland.  10.13  Survival;  Successors  and  Assigns.  All
covenants,  agreements,  representations  and warranties  made herein and in the
Other Agreements shall survive Closing and the execution and delivery to Bank of
the  Note,  and  shall  continue  in full  force  and  effect  until  all of the
Obligations  have  been  paid in full.  Whenever  any of the  parties  hereto is
referred  to,  such  reference  shall be deemed to include  the  successors  and
assigns of such party. All covenants, agreements, representations and warranties
by or on behalf of Borrower  which are contained in this Agreement and the Other
Agreements shall inure to the benefit of the successors and assigns of the Bank.
This Agreement may not be assigned by Borrower without the prior written consent
of Bank.  10.14 Use of Terms.  The use of any gender or the neuter  herein shall
also refer to the other  gender or the  neuter  and the use of the plural  shall
also refer to the singular,  and vice versa.  10.15  Severability.  If any term,
provision or  condition,  or any part thereof,  of this  Agreement or any of the
Other  Agreements shall for any reason be bound or held invalid or unenforceable
by any court or governmental agency of competent  jurisdiction,  such invalidity
or  unenforceability  shall not affect the remainder of such term,  provision or
condition nor any other term,  provision or condition,  and this Agreement,  the
Note, and the Other Agreements shall survive and be construed as if such invalid
or unenforceable  term,  provision or condition had not been contained  therein.
10.16 Merger and Integration.  This Agreement and the attached Exhibits, if any,
contained the entire agreement of the parties hereto with respect to the matters
covered and the





transactions  contemplated hereby, and no other agreement,  statement or promise
made by any party hereto, or by any employee,  officer, agent or attorney of any
party hereto, which is not contained herein,  shall be valid and binding.  10.17
Counterparts.  This Agreement may be executed in any number of counterparts  and
by different  parties hereto on separate  counterparts,  each of which,  when so
executed and delivered,  shall be an original,  but all such counterparts  shall
together  constitute  the same  instrument.  10.18  Headings.  The  headings and
subheadings  contained in the titling of this  Agreement are intended to be used
for convenience only and do not constitute part of this Agreement. 10.19 Consent
to  Jurisdiction;  Service of Process.  The Borrower  hereby agrees and consents
that  any  action  or  proceeding  arising  out of or  brought  to  enforce  the
provisions  of this  Agreement  may be brought in any  appropriate  court in the
State of Maryland,  or in any other court having  jurisdiction  over the subject
matter,  all at the sole  election  of the Bank,  and by the  execution  of this
Agreement the Borrower  irrevocably  consents to the  jurisdiction  of each such
court. The Borrower hereby irrevocably  appoints Donald C. Weymer,  President of
the Borrower, at its agent to accept service of process for it and on its behalf
in any section and to receive any notices  required  pursuant to or by the terms
of this Agreement.

         IN WITNESS  WHEREOF,  the parties  hereto have executed or caused to be
executed this Agreement, under seal as of the date first above written.

                                    BORROWER:

                           INTERACTIVE SYSTEMS, INC., a Maryland corporation

                         By: /s/ Donald C. Weymer (SEAL)
                                Donald C. Weymer,
                                    President

             NATIONAL CONVERSION SYSTEMS, INC., a Virginia corporation

                         By: /s/ Donald C. Weymer (SEAL)

                                            Donald C. Weymer,
                                            President

                                    BANK:

                     SANDY SPRING NATIONAL BANK OF MARYLAND

                          By: /s/ Pamela Roberts (SEAL)

                                            Name: Pamela Roberts
                                            Title: Vice President



                                                       - 5 -

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                                                       - 5 -

                      AMENDED AND RESTATED PROMISSORY NOTE

                       (SECURED REVOLVING LINE OF CREDIT)

         FOR VALUE  RECEIVED,  the  undersigned,  INTERACTIVE  SYSTEMS,  INC., a
Maryland   corporation  and  NATIONAL  CONVERSION  SYSTEMS,   INC.,  a  Virginia
corporation  (collectively,  the  "Borrower"),  promises  to pay to the order of
SANDY SPRING NATIONAL BANK OF MARYLAND,  a national  banking  association,  with
offices at 17801 Georgia  Avenue,  Olney,  Maryland  20832,  its  successors and
assigns,  (the "Lender") at such offices or at such other place or places as the
Lender may from time to time  designate in writing,  the  principal  sum of FOUR
MILLION AND NO/100 DOLLARS  ($4,000,000.00),  together with interest at the rate
hereinafter  provided  until paid,  said principal and interest being payable as
follows: (a) Interest shall accrue hereunder at the rate of One Percent (1%) per
annum above the Lenders  "Prime Rate of Interest"  (as such term is  hereinafter
defined  below),  on so much of the  principal  as  shall  from  time to time be
advanced and/or  re-advanced  and remain unpaid,  and interest only shall be due
and  payable  monthly  commencing  on the first  (1st)  day of the  first  (1st)
calendar month  following the date hereof and continuing on the same day of each
and every calendar month thereafter; and

(b) If not sooner paid, the entire balance of principal  remaining unpaid,  plus
interest  accrued  thereon at the aforesaid rate not previously  paid,  fees and
costs, if any, shall be due and payable in full on June 30, 2001.

         For  purposes  of  computing  interest  on the debt  evidenced  hereby,
interest  shall be  calculated  on the basis of a three  hundred sixty (360) day
calendar  year.  Payments  made on account  hereof shall be applied first to the
payment of late fees,  then to the payment of accrued and unpaid  interest,  and
the remainder shall be credited to principal.

         As used in this Note the expression  "Prime Rate of Interest"  shall be
defined as the rate of interest  from time to time  established  and publicly or
privately  announced by the Lender as its then applicable prime rate of interest
to be used as an index in  determining  actual  interest  rates to be charged to
certain  borrowers  of the  Lender.  The  rate of  interest  hereunder  shall be
adjusted as and when any change in the "Prime Rate of Interest" shall occur. The
Lender may establish and  reestablish  the "Prime Rate of Interest" from time to
time in its sole  discretion,  it being understood and agreed that (1) such rate
is intended merely as an index for setting interest rates of the Lender, and (2)
the  particular  borrower  may be more than,  equal to, or less than such index;
provided, however, that at no time shall the rate of interest applicable to this
Note exceed the highest rate permissible under applicable laws.

         If default be made in the payment of any  installment  of  principal or
interest due under this Note,  and such default  shall  continue for a period of
ten (1) days after notice to the Borrower, the entire principal sum outstanding,
together with accrued  interest  thereon,  fees and costs, if any, shall at once
become due and payable at the option of the Lender without  further  notice.  If
default be made in the  performance  of any covenant of either (a) the Indemnity
Deed of Trust and  Security  Agreement  made by Donald C.  Weymer to secure  the
Lender  dated July 30, 1999,  and recorded on September  21, 1999 among the Land
Records of Montgomery County, Maryland in Liber 17507, at folio





276, or (b) the Amended and Restated Loan and Security Agreement given to secure
this  Note,  or  in  any  of  the  documents  listed  in  Section  5.03  thereof
(collectively,  the "Security Documents") (the terms and provisions of which are
incorporated  herein by this  reference  as if set  forth in full),  and if such
default shall continue for the duration of any  applicable  grace period therein
contained, the entire principal sum outstanding,  together with accrued interest
thereon,  shall at once  become  due and  payable  at the  option of the  Lender
without further  notice.  Failure to exercise such option shall not constitute a
waiver of the right to exercise the same in the event of any subsequent default.
Acceleration  of  maturity,  once  claimed by the  Lender,  may at its option be
rescinded by an  instrument in writing to that effect;  however,  the tender and
acceptance  of a partial  payment or partial  performance  shall not, by itself,
affect or rescind such acceleration of maturity.

         In the event  any  installment  due  under  this Note is paid more than
fifteen (15) days after the date when the same is due,  then the Lender shall be
entitled to collect a "late charge" in an amount equal to one-twentieth (1/20th)
of such installment.

         In the event it shall  become  necessary  to employ  counsel to collect
this  obligation or to protect the security  hereof,  the Borrower agrees to pay
reasonable  attorney's fees, whether suit be brought or not, and all other costs
and  expenses  reasonably  connected  with  collection,  the  protection  of the
security,  the defense of any counterclaim,  the enforcement  (including without
limitation,  as a part of any proceeding brought under the Bankruptcy Reform Act
of 1978, as amended) of any remedies herein provided for, or provided for in the
Security Documents given to secure this Note.

         The  privilege  is  reserved  to  prepay  the  principal   indebtedness
evidenced hereby, in whole or in part, at any time, without premium or penalty.

         The Borrower and any  endorsers,  guarantors  and sureties  jointly and
severally waive presentment,  protest and demand,  notice of protest,  notice of
dishonor,  demand and  dishonor,  and any and all lack of diligence or delays in
the collection or enforcement  hereof and expressly agree that this Note, or any
payment  hereunder,  may be  extended  from  time  to  time  without  in any way
affecting  the  liability of the Borrower or any  endorser,  guarantor or surety
hereof.  Borrower  also waives any right to trial by jury fully with  respect to
each  instance and each issue as to which the right to a jury trial shall now or
hereafter exist hereunder.

         The validity and  construction of this Note and all matters  pertaining
thereto are to be determined according to the laws of the State of Maryland.

         In the event any provision of this Note (or any part of any  provision)
is  held  by a  court  of  competent  jurisdiction  to be  invalid,  illegal  or
unenforceable in any respect,  such invalidity,  illegality or  unenforceability
shall  not  affect  any  other  provision  (or  remaining  part of the  affected
provision) of this Note;  but this Note shall be as if such invalid,  illegal or
unenforceable  provision (or part thereof) had not been  contained in this Note,
but only to the extent it is invalid, illegal or unenforceable.

         All  notices,  demands,  requests  and  other  communications  required
pursuant to the  provisions of this Note or the Security  Documents  shall be in
writing  and  shall be  deemed to have  been  properly  given or served  for all
purposes  when  presented  personally  or sent by United  States  Registered  or
Certified Mail - Return Receipt Requested,  postage prepaid, to the Borrower at:
1777 N. Kent Street, Suite 1103, Arlington, Virginia 22209; and to the Lender at
the address  stated in the first  paragraph of this Note. The Lender or Borrower
may  designate  a change of address  by notice in  writing  to the other  party.
Whenever in this Note the giving of notice by mail or otherwise is required, the
giving of such notice may be waived in writing by the person entitled to receive
such notice.

         It is the intention of the Borrower and the Lender to conform  strictly
to applicable usury laws. Accordingly,  if the transactions  contemplated hereby
would be  usurious  under  applicable  law  (including  the laws of the State of
Maryland  and the laws of the United  States of  America)  then,  in that event,
notwithstanding  anything  to the  contrary  in any  agreement  entered  into in
connection with or as security for this Note, it is agreed that the aggregate of
all  consideration  which  constitutes  interest  under  applicable  law that is
contracted  for,  charged or received  under this Note or under any of the other
aforesaid  agreements or otherwise in  connection  with this Note shall under no
circumstances  exceed the maximum amount of interest  allowed by applicable law,
and any excess shall be credited,  first, on fees and costs, if any, due on this
Note and, secondly, on the principal balance due on this Note by the Lender (or,
if this Note shall have been paid in full, refunded to the Borrower).

         As used in this Note,  the  singular  shall  include the plural and the
plural shall include the singular, where the context shall so require.

         This  Note  shall be the joint and  several  obligation  of each of the
makers  hereof  (if more than one) and shall  apply to and bind them and each of
them and  their  respective  heirs,  successors,  personal  representatives  and
assigns.

         So long as the loan indebtedness evidenced by this Note remains unpaid,
the  Borrower  agrees to provide  the Lender  with such other  information  with
respect to the financial  statements of the Borrower as the Lender may from time
to time require.

         SHOULD ANY SUMS BECOME DUE AND PAYABLE  HEREUNDER,  AND SUCH SUM IS NOT
PAID WHEN AND AS DUE,  TIME BEING OF THE ESSENCE,  THE BORROWER  AUTHORIZES  ANY
ATTORNEY ADMITTED TO PRACTICE BEFORE ANY COURT OF RECORD IN THE UNITED STATES TO
CONFESS JUDGMENT ON BORROWER'S BEHALF OF THE FULL SUM DUE HEREON PLUS REASONABLE
ATTORNEYS' FEES, AND, UPON THE ENTRY OF JUDGMENT, BORROWER WAIVES THE BENEFIT OF
ANY AND EVERY STATUTE,  ORDINACE,  OR RULE OF COURT WHICH MAY BE LAWFULLY WAIVED
CONFERRING UPON BORROWER ANY RIGHT OR PRIVILEGE OR EXEMPTION,  STAY OF EXECUTION
OR SUPPLEMENTARY PROCEEDINGS,  OR OTHER RELIEF FROM THE ENFORCEMENT OR IMMEDIATE
ENFORCEMENT  OF A  JUDGMENT  OR  RELATED  PROCEEDINGS  ON A  JUDGMENT.  BORROWER
CONSENTS  TO  VENUE  IN ANY  COUNTY  IN THE  STATE  OF  MARYLAND  OR THE CITY OF
BALTIMORE  WITH  RESPECT TO THE  INSTITUTION  OF AN ACTION  CONFESSING  JUDGMENT
HEREON,  REGARDLESS  OF WHERE  VENUE WOULD  OTHERWISE  BE PROPER.  ANY  JUDGMENT
ENTERED  AGAINST  BORROWER,  WHETHER  BY  CONFESSION  OR  OTHERWISE,  SHALL BEAR
INTEREST AT A RATE WHICH IS THE HIGHEST RATE OF INTEREST  BEING PAID BY BORROWER
ON THE DATE OF  JUDGMENT.  THE  AUTHORITY  AND  POWER TO  APPEAR  FOR AND  ENTER
JUDGMENT  AGAINST  BORROWER  SHALL  NOT BE  EXHAUSTED  BY ONE OR MORE  EXERCISES
THEREOF, OR BY ANY IMPERFECT EXERCISE THEREOF,  AND SHALL NOT BE EXTINGUISHED BY
ANY JUDGMENT ENTERED PURSUANT THERETO; SUCH AUTHORITY AND POWER MAY BE EXERCISED
ON ONE  OR  MORE  OCCASIONS,  FROM  TIME  TO  TIME,  IN THE  SAME  OR  DIFFERENT
JURISDICTIONS  AS OFTEN AS THE LENDER OR ITS  ASSIGNS  SHALL DEEM  NECESSARY  OR
ADVISABLE UNTIL ALL SUMS DUE HEREUNDER HAVE BEEN PAID IN FULL.

         It is  understood  and agreed that in the event a default  exists under
any  other  loan  held by the  Lender in which  the  Borrower  or any  guarantor
therefor is a borrower or a  guarantor  thereunder,  then the Lender may, at its
option,  declare the entire  indebtedness  evidenced hereby  immediately due and
payable.

         The Borrower  hereby warrants and represents that the loan evidenced by
this Note and was made for  acquiring  or carrying  on a business or  commercial
enterprises.

         Time is of the essence of all provisions of this Note.

         It is  contemplated  that by reason of prepayments  hereon there may be
times  when  no  indebtedness  is  owing  hereunder;  but  notwithstanding  such
occurrences,  this Note  shall be in full  force and  effect  as  advances  made
pursuant to and under the terms of this Note subsequent to each occurrence.

         In the event that the unpaid  principal  amount hereof at any time, for
any reason,  exceeds the maximum  amount  hereinabove  specified,  the  Borrower
covenants and agrees to pay the excess  principal  amount forthwith upon demand;
such  excess  principal  amount  shall in all  respects be deemed to be included
among the advances  made pursuant to the other terms of this Note and shall bear
interest at the rate or rates hereinabove stated.

         The  proceeds  of the loan  evidenced  hereby are to be  advanced  on a
revolving  credit basis pursuant to the "Borrowing Base" provisions set forth in
the aforesaid Amended and Restated Loan and Security Agreement. Any amounts from
time to time paid on account of the principal  indebtedness evidenced hereby may
be  re-advanced  to the Borrower  pursuant to (and subject to the provisions and
limitations  of) this  Note and the  aforesaid  Amended  and  Restated  Loan and
Security Agreement.  The aggregate principal  indebtedness  evidenced hereby may
increase or decrease from time to time;  provided,  however,  that the aggregate
principal indebtedness evidenced hereby at any one time shall not exceed the sum
of FOUR MILLION AND NO/100 DOLLARS ($4,000,000.00).

         This Note is a restatement  and  modification  of a certain  Promissory
Note (Secured  Revolving  Line of Credit),  dated July 30, 1999, to the order of
Lender,  evidencing a loan in the original  principal  amount of Two Million and
No/100 Dollars  ($2,000,000.00)  (the "Original Note"),  secured by the Security
Documents.   Nothing   herein-contained   shall  be  deemed  a  novation  as  to
indebtedness evidenced by the Original Note, as restated and modified.





         MADE this 30th day of March , 2000.

                          INTERACTIVE SYSTEMS, INC., a

                         Maryland corporation

                         By:      /s/ Donald C. Weymer              [Seal]

                              Donald C. Weymer,

                                    President

                                            NATIONAL CONVERSION SYSTEMS, INC.,

                             a Virginia corporation

                      By:      /s/ Donald C. Weymer                     [Seal]

                                 Donald C. Weymer,

                                    President