MEDICAL DYNAMICS INC
8-K, 1998-11-05
PHOTOGRAPHIC EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C.

                                    FORM 8-K

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

                         Date of Report: October 9, 1998


                             MEDICAL DYNAMICS, INC.
                             ----------------------
             (Exact name of Registrant as specified in its charter)

                         Commission file number: 0-8632

          Colorado                                              84-0631765
          --------                                              ----------
(State or other jurisdiction of                               (IRS Employer
incorporation or organization)                            Identification Number)


                             99 Inverness Drive East
                            Englewood, Colorado 80112
                            -------------------------
               (Address of principal executive offices) (Zip Code)


               Registrant's telephone number, including area code:
                                 (303) 790-2990

                                 not applicable
                                 --------------
                  former name or former address, if applicable

<PAGE>


Item 5: Other Events

     On  October  9,  1998,  Medical  Dynamics,   Inc.  ("MEDY")  executed  loan
agreements  and other  related  documents  with Norwest  Business  Credit,  Inc.
("Norwest") of Denver, Colorado, to provide MEDY with a loan of up to $1,000,000
based primarily on MEDY's  receivables  and the receivables of its  wholly-owned
subsidiary, Computer Age Dentist, Inc. ("CADI"). Interest on the amount borrowed
will initially be 3% over Norwest's announced "base rate," although the rate may
be  reduced to 1% over  Norwest's  announced  "base  rate"  depending  on MEDY's
consolidated  net income as reported  in MEDY's  audited  financial  statements.
Initially  MEDY's  accounts  receivable  permitted  MEDY to  draw  approximately
$200,000 on this loan.  Loan  availability  will  increase to the extent  MEDY's
revenues and accounts  receivables (not including past-due accounts  receivable)
increase.  The  agreement  contains a provision,  requiring  MEDY to pay Norwest
$2,750 per month as minimum  interest,  as well as standard default and remedies
provisions.  Unless  terminated  earlier,  the loan is repayable in full and the
agreement will be terminated on October 9, 2001.


Item 7. Financial Statements and Exhibits

     (a) Financial Statements of Business Acquired

         Not required.

     (b) Pro Forma Financial Information

         Not required.

     (c) Exhibits

         1.   Loan Agreement

<PAGE>


                                   SIGNATURES

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

                                               MEDICAL DYNAMICS, INC.



October 30, 1998                               By: /s/ Van A. Horsley
                                                 -------------------------------
                                                 Van A. Horsley, President







                 ==============================================
                          CREDIT AND SECURITY AGREEMENT
                                  BY AND AMONG
                           MEDICAL DYNAMICS, INC. AND
                           COMPUTER AGE DENTIST, INC.
                                       AND
                          NORWEST BUSINESS CREDIT, INC.
                          Dated as of: October 9, 1998

                 ==============================================


<PAGE>



                          CREDIT AND SECURITY AGREEMENT

                           Dated as of October 9, 1998


     MEDICAL DYNAMICS,  INC., a Colorado corporation,  and COMPUTER AGE DENTIST,
INC.,  a  California   corporation   (each  a  "Borrower";   collectively,   the
"Borrowers"),  and NORWEST BUSINESS CREDIT,  INC., a Minnesota  corporation (the
"Lender"), hereby agree as follows:


                                    ARTICLE I

                                   Definitions
                                   -----------

     Section 1.1  Definitions.  For all  purposes of this  Agreement,  except as
otherwise  expressly provided or unless the context otherwise requires the terms
defined in this Article have the meanings assigned to them in this article,  and
include  the  plural  as well as the  singular;  and all  accounting  terms  not
otherwise  defined herein have the meanings  assigned to them in accordance with
GAAP.

          "Accounts" means all of the accounts of each Borrower, as such term is
     defined in the UCC,  including  without  limitation  the  aggregate  unpaid
     obligations  of  customers  and other  account  debtors to either  Borrower
     arising out of the sale or lease of goods or  rendition of services by such
     Borrower on an open account or deferred payment basis.

          "Advance"  means an advance to a Borrower  by the Lender  pursuant  to
     Section 2.1.

          "Affiliate"   or   "Affiliates"   means  any  Person   controlled  by,
     controlling  or under common  control with a Borrower,  including  (without
     limitation) any Subsidiary of a Borrower.  For purposes of this definition,
     "control," when used with respect to any specified Person,  means the power
     to  direct  the  management  and  policies  of  such  Person,  directly  or
     indirectly, whether through the ownership of voting securities, by contract
     or otherwise.

          "Agreement"  means this  Credit and  Security  Agreement,  as amended,
     supplemented or restated from time to time.

          "Availability"  means with respect to MDI, the  difference  of (i) the
     MDI Borrowing Base and (ii) the  outstanding  principal  balance of the MDI
     Note and, with respect to CAD, the difference of (i) the CAD Borrowing Base
     and (ii) the outstanding principal balance of the CAD Note.


<PAGE>


          "Banking  Day" means a day other than a Saturday,  Sunday or other day
     on which banks are generally not open for business in Denver, Colorado.

          "Base Rate" means the rate of interest publicly announced from time to
     time by Norwest  Bank  Minnesota as its "base rate" or, if such bank ceases
     to announce a rate so designated,  any similar successor rate designated by
     the Lender.

          "Book Net Worth"  means the  aggregate  of the  common  and  preferred
     stockholders' equity in a Borrower, determined in accordance with GAAP.

          "CAD" means Computer Age Dentist, Inc.

          "CAD Borrowing Base" means, at any time the lesser of:

          (a) the Maximum Line; or

          (b)  subject  to  change  from  time  to  time  in the  Lender's  sole
     discretion, 80% of Eligible Accounts of CAD.

          "CAD Note"  means the  promissory  note of CAD payable to the order of
     the Lender in  substantially  the form of Exhibit A-2 and any note or notes
     issued in  substitution  therefor,  as the same may  hereafter  be amended,
     supplemented or restated from time to time.

          "Capital Expenditures" for a period means any expenditure of money for
     the purchase or  construction of assets,  or for  improvements or additions
     thereto, which are capitalized on a Borrower's balance sheet.

          "Collateral"  means each Borrower's  Equipment,  General  Intangibles,
     Inventory,  Receivables,  Investment  Property,  all sums on deposit in any
     Collateral  Account,  and any items in any Lockbox;  together  with (i) all
     substitutions  and  replacements  for and products of any of the foregoing;
     (ii)  proceeds  of any and all of the  foregoing;  (iii) in the case of all
     tangible goods, all accessions; (iv) all accessories,  attachments,  parts,
     equipment  and repairs now or  hereafter  attached or affixed to or used in
     connection with any tangible goods; and (v) all warehouse  receipts,  bills
     of lading  and other  documents  of title now or  hereafter  covering  such
     goods.

          "Collateral Account" has the meaning given in Section 4.1(f).

          "Collateral  Account Agreement" means the Collateral Account Agreement
     of even date herewith by and among each Borrower, Norwest Bank Colorado and
     the Lender.

          "Commitment" means the Lender's  commitment to make Advances to or for
     the account of either Borrower pursuant to Article II.

                                       2
<PAGE>


          "Credit  Facilities"  means the credit facilities being made available
     to the Borrowers by the Lender pursuant to Article II.

          "Debt" of any  Person  means all items of  indebtedness  or  liability
     which in  accordance  with GAAP  would be  included  in  determining  total
     liabilities  as shown on the  liabilities  side of a balance  sheet of that
     Person as at the date as of which Debt is to be determined. For purposes of
     determining  a  Person's  aggregate  Debt at any time,  "Debt"  shall  also
     include the  aggregate  payments  required to be made by such Person at any
     time under any lease that is considered a capitalized lease under GAAP.

          "Default"  means an event  that,  with  giving of notice or passage of
     time or both, would constitute an Event of Default.

          "Default  Period" means any period of time  beginning on the first day
     of any month  during  which a Default or Event of Default has  occurred and
     ending on the date the Lender  notifies  the  Borrower in writing that such
     Default or Event of Default has been cured or waived.

          "Default  Rate" means,  with respect to the  Advances,  an annual rate
     equal to three percent (3%) over the Floating Rate, which rate shall change
     when and as the Floating Rate changes.

          "EBITDA"  for  a  period  means,   pretax   earnings  from  continuing
     operations before (i) Interest Expense, (ii) depreciation,  depletion,  and
     amortization of tangible and intangible assets, (iii) special extraordinary
     gains, (iv) minority interests,  and (v) miscellaneous gains and losses, in
     each case for such period, computed and calculated in accordance with GAAP.

          "ERISA" means the Employee  Retirement Income Security Act of 1974, as
     amended.

          "Eligible  Accounts"  means all unpaid  Accounts,  net of any credits,
     except the following shall not in any event be deemed Eligible Accounts:

               (i) That  portion  of  Accounts  unpaid 90 days or more after the
          invoice date;

               (ii) That  portion of  Accounts  that is disputed or subject to a
          claim of offset or a contra account;

               (iii)  That  portion  of  Accounts  not yet  earned  by the final
          delivery of goods or rendition of services,  as applicable,  including
          advance billings under software maintenance agreements,  by a Borrower
          to the customer;

               (iv) Accounts owed by any unit of government,  whether foreign or
          domestic (provided,  however, that there shall be included in Eligible
          Accounts that portion of Accounts owed by such units of government for

                                       3
<PAGE>


          which a Borrower has provided evidence satisfactory to the Lender that
          (A) the Lender has a first priority  perfected  security  interest and
          (B) such Accounts may be enforced by the Lender directly  against such
          unit of government under all applicable laws);

               (v) Accounts owed by an account debtor located outside the United
          States or Canada  which are not (A) backed by a bank  letter of credit
          naming the Lender as  beneficiary  or assigned  to the Lender,  in the
          Lender's  possession and acceptable to the Lender in all respects,  in
          its sole discretion, or (B) covered by a foreign receivables insurance
          policy acceptable to the Lender in its sole discretion;

               (vi)  Accounts owed by an account  debtor that is insolvent,  the
          subject of bankruptcy proceedings or has gone out of business;

               (vii)  Accounts  owed by a  shareholder,  Subsidiary,  Affiliate,
          officer or employee of either Borrower;

               (viii) Accounts not subject to a duly perfected security interest
          in the  Lender's  favor or which are  subject  to any  lien,  security
          interest  or  claim  in  favor of any  Person  other  than the  Lender
          including without limitation any payment or performance bond;

               (ix)  That  portion  of  Accounts  that  has  been  restructured,
          extended, amended or modified;

               (x)  That  portion  of  Accounts  that  constitutes  advertising,
          finance charges, service charges or sales or excise taxes;

               (xi) That portion of the aggregate  accounts of a single customer
          that exceeds 15% of all aggregate Accounts;

               (xii) Accounts owed by an account  debtor,  regardless of whether
          otherwise  eligible,  if 10% or more of the  total  amount  due  under
          Accounts  from such debtor is  ineligible  under  clauses (i), (ii) or
          (ix) above; and

               (xiii) Accounts, or portions thereof, otherwise deemed ineligible
          by the Lender in its sole discretion.

          "Environmental Law" has the meaning specified in Section 5.12.

          "Equipment" means all of the equipment of each Borrower,  as such term
     is defined in the UCC, whether now owned or hereafter  acquired,  including
     but not limited to all present and future machinery,  vehicles,  furniture,
     fixtures, manufacturing equipment, shop equipment, office and recordkeeping

                                       4
<PAGE>


     equipment,  parts, tools,  supplies,  and including  specifically  (without
     limitation) the goods described in any equipment  schedule or list herewith
     or hereafter furnished to the Lender by either Borrower.

          "Event of Default" has the meaning specified in Section 8.1.

          "Floating Rate" means an annual rate equal to the sum of the Base Rate
     plus three  percent  (3%),  which  annual rate shall change when and as the
     Base Rate changes, provided,  however, that if (i) no Event of Default then
     exists, and (ii) the Borrowers'  consolidated  audited financial statements
     as  of  September  30th  of  any  year   demonstrate  that  the  Borrowers'
     consolidated Net Income,  excluding  extraordinary gains, equals or exceeds
     the  amounts  set forth  below,  the  Floating  Rate shall be reduced as of
     February  1st of the  following  year to the rate set forth  opposite  such
     amount:

     ---------------------------------------------- ------------------
               Consolidated Net Income                      Rate
     ---------------------------------------------- ------------------
           Greater than zero but less than or               2.0%
                   equal to $250,000
     ---------------------------------------------- ------------------
            More than $250,000 or more but less             1.5%
                 than or equal to $500,000
     ---------------------------------------------- ------------------
                  More than $500,000                        1.0%
     ---------------------------------------------- ------------------

          "Funding Date" has the meaning given in Section 2.1.

          "GAAP" means generally accepted  accounting  principles,  applied on a
     basis  consistent  with the accounting  practices  applied in the financial
     statements described in Section 5.5.

          "General  Intangibles"  means all of the general  intangibles  of each
     Borrower,  as such  term is  defined  in the  UCC,  whether  now  owned  or
     hereafter acquired,  including (without  limitation) all present and future
     patents, patent applications,  copyrights,  trademarks,  trade names, trade
     secrets,  customer  or supplier  lists and  contracts,  manuals,  operating
     instructions,  permits,  franchises, the right to use each Borrower's name,
     and the goodwill of each Borrower's business.

          "Hazardous Substances" has the meaning given in Section 5.12.

          "Interest  Expense"  means,  for a  fiscal  year-to-date  period,  the
     Borrower's  total gross  interest  expense  during  such period  (excluding
     interest income), and shall in any event include,  without limitation,  (i)
     interest  expensed (whether or not paid) on all Debt, (ii) the amortization
     of debt discounts, (iii) the amortization of all fees payable in connection
     with the incurrence of Debt to the extent included in interest expense, and
     (iv) the portion of any capitalized lease obligation  allocable to interest
     expense.

                                       5
<PAGE>


          "Inventory" means all of the inventory of each Borrower,  as such term
     is defined in the UCC,  whether now owned or  hereafter  acquired,  whether
     consisting  of  whole  goods,  spare  parts  or  components,   supplies  or
     materials, whether acquired, held or furnished for sale, for lease or under
     service contracts or for manufacture or processing, and wherever located.

          "Investment  Property"  means all of the  investment  property of each
     Borrower,  as such  term is  defined  in the  UCC,  whether  now  owned  or
     hereafter acquired,  including but not limited to all securities,  security
     entitlements, securities accounts, commodity contracts, commodity accounts,
     stocks,  bonds, mutual fund shares, money market shares and U.S. Government
     securities.

          "Loan  Documents"  means this  Agreement,  the Notes and the  Security
     Documents.

          "Lockbox" has the meaning given in the Lockbox Agreement.

          "Lockbox  Agreement"  means the  Lockbox  Agreement  by and among each
     Borrower, Norwest Bank Colorado and, the Lender, of even date herewith.

          "MDI" means Medical Dynamics, Inc.

          "MDI Note"  means the  promissory  note of CAD payable to the order of
     the Lender in  substantially  the form of Exhibit A-1 and any note or notes
     issued in  substitution  therefor,  as the same may  hereafter  be amended,
     supplemented or restated from time to time.

          "MDI Borrowing Base" means, at any time the lesser of:

          (c) the Maximum Line; or

          (d)  subject  to  change  from  time  to  time  in the  Lender's  sole
     discretion, 80% of Eligible Accounts of MDI.

          "Maturity Date" means October 9, 2001

          "Maximum Line" means $1,000,000 unless said amount is reduced pursuant
     to Section  2.8, in which event it means the amount to which said amount is
     reduced.

          "Minimum Interest Charge" has the meaning given in Section 2.2(b).

          "Net Income" means pre-tax net income from continuing  operations,  as
     determined in accordance with GAAP.

          "Norwest  Bank  Colorado"   means  Norwest  Bank  Colorado,   National
     Association.

          "Norwest  Bank  Minnesota"  means  Norwest  Bank  Minnesota,  National
     Association.

                                       6
<PAGE>


          "Note" means the CAD Note or the MDI Note,  and "Notes"  means the CAD
     Note and the MDI Note.

          "Obligations"  of each Borrower  means each and every debt,  liability
     and obligation of every type and description which such Borrower may now or
     at any time  hereafter owe to the Lender,  whether such debt,  liability or
     obligation  now  exists or is  hereafter  created or  incurred,  whether it
     arises in a  transaction  involving  the Lender  alone or in a  transaction
     involving  other  creditors of such  Borrower,  and whether it is direct or
     indirect,  due  or to  become  due,  absolute  or  contingent,  primary  or
     secondary, liquidated or unliquidated, or sole, joint, several or joint and
     several, and including  specifically,  but not limited to, all indebtedness
     of such Borrower arising under this Agreement, any Note of such Borrower or
     any other loan or credit  agreement or guaranty  between such  Borrower and
     the Lender, whether now in effect or hereafter entered into.

          "Patent  and  Trademark  Security  Agreement"  means  the  Patent  and
     Trademark  Security  Agreement by either Borrower in favor of the Lender of
     even date herewith.

          "Permitted Lien" has the meaning given in Section 7.1.

          "Person"  means  any  individual,   corporation,   partnership,  joint
     venture,  limited  liability  company,  association,  joint-stock  company,
     trust, unincorporated organization or government or any agency or political
     subdivision thereof.

          "Plan"  means an employee  benefit  plan or other plan  maintained  by
     either  Borrower for such  Borrower's  employees and covered by Title IV of
     ERISA.

          "Premises"  means all  premises  where  either  Borrower  conducts its
     business and has any rights of possession,  including (without  limitation)
     the premises legally described in Exhibit C attached hereto.

          "Receivables"  means  each and  every  right of the  Borrower  of each
     Borrower to the payment of money,  whether such right to payment now exists
     or hereafter  arises,  whether such right to payment  arises out of a sale,
     lease or other  disposition of goods or other property,  out of a rendering
     of  services,  out of a loan,  out of the  overpayment  of  taxes  or other
     liabilities,  or otherwise arises under any contract or agreement,  whether
     such right to payment is created,  generated or earned by such  Borrower or
     by some other person who subsequently  transfers such person's  interest to
     such Borrower, whether such right to payment is or is not already earned by
     performance, and howsoever such right to payment may be evidenced, together
     with all other  rights  and  interests  (including  all liens and  security
     interests)  which such  Borrower  may at any time have by law or  agreement
     against  any account  debtor or other  obligor  obligated  to make any such
     payment or against any  property of such account  debtor or other  obligor;
     all including but not limited to all present and future accounts,  contract
     rights, loans and obligations receivable,  chattel papers, bonds, notes and
     other debt instruments,  tax refunds and rights to payment in the nature of
     General Intangibles.

                                       7
<PAGE>


          "Reportable  Event"  shall have the  meaning  assigned to that term in
     Title IV of ERISA.

          "Security  Documents"  means this  Agreement,  any Collateral  Account
     Agreement,  any  Lockbox  Agreement,  the  Patent  and  Trademark  Security
     Agreement and any other document  delivered to the Lender from time to time
     to  secure  the  Obligations,   as  the  same  may  hereafter  be  amended,
     supplemented or restated from time to time.

          "Security Interest" has the meaning given in Section 3.1.

          "Subsidiary"  means  any  corporation  of which  more  than 50% of the
     outstanding  shares of capital  stock  having  general  voting  power under
     ordinary  circumstances  to elect a majority of the board of  directors  of
     such  corporation,  irrespective of whether or not at the time stock of any
     other class or classes  shall have or might have voting  power by reason of
     the  happening of any  contingency,  is at the time  directly or indirectly
     owned  by  either  Borrower,  by  either  Borrower  and one or  more  other
     Subsidiaries, or by one or more other Subsidiaries.

          "Termination  Date" means the earliest of (i) the Maturity Date,  (ii)
     the date that either Borrower  terminates the Credit  Facilities,  or (iii)
     the date the Lender demands  payment of the  Obligations  after an Event of
     Default pursuant to Section 8.2.

          "UCC" means the Uniform Commercial Code as in effect from time to time
     in the state  designated  in  Section  9.13 as the state  whose  laws shall
     govern this Agreement,  or in any other state whose laws are held to govern
     this Agreement or any portion hereof.

     Section 1.2 Cross References. All references in this Agreement to Articles,
Sections and subsections, shall be to Articles, Sections and subsections of this
Agreement unless otherwise explicitly specified.

                                   ARTICLE II

                    Amount and Terms of the Credit Facilities
                    -----------------------------------------

     Section 2.1 Advances.  The Lender  agrees,  on the terms and subject to the
conditions  herein set forth, to make advances to the Borrower from time to time
from the date all of the  conditions set forth in Section 4.1 are satisfied (the
"Funding Date") to the  Termination  Date, to make Advances (i) to the Borrowers
in a total  aggregate  amount at any time  outstanding not to exceed the Maximum
Line and (ii) to each  Borrower in an aggregate  amount at any time  outstanding
not to exceed such Borrower's  Borrowing Base.  MDI's obligation to pay Advances
shall be evidenced by the MDI Note and CAD's obligation to pay Advances shall be
evidenced  by the CAD Note,  and each such  obligation  shall be  secured by the

                                       8
<PAGE>


Collateral  as  provided  in  Article  III.  Within the limits set forth in this
Section  2.1,  each  Borrower  may  borrow,  prepay  pursuant to Section 2.6 and
reborrow.  The  Borrowers  agree to  comply  with the  following  procedures  in
requesting Advances under this Section 2.1:

          (a) A Borrower  shall make each  request  for an Advance to the Lender
     before  11:00  a.m.  (Denver  time)  of the day of the  requested  Advance.
     Requests may be made in writing or by telephone, specifying the date of the
     requested Advance and the amount thereof.  Each request shall be by (i) any
     officer of such Borrower;  or (ii) any person designated as such Borrower's
     agent by any officer of such Borrower in a writing delivered to the Lender;
     or (iii) any person whom the Lender reasonably believes to be an officer of
     such Borrower or such a designated agent.

          (b) Upon fulfillment of the applicable conditions set forth in Article
     IV, the Lender  shall  disburse the  proceeds of the  requested  Advance by
     crediting the same to such  Borrower's  demand deposit  account  maintained
     with Norwest Bank Colorado  unless the Lender and such Borrower shall agree
     in writing to another manner of  disbursement.  Upon the Lender's  request,
     the Borrower  requesting the Advance shall promptly confirm each telephonic
     request  for  an  Advance  by  executing  and   delivering  an  appropriate
     confirmation  certificate  to the  Lender.  Each  Borrower  shall repay all
     Advances  made to such  Borrower  even if the Lender does not receive  such
     confirmation  and even if the person  requesting an Advance was not in fact
     authorized  to do so.  Any  request  for an  Advance,  whether  written  or
     telephonic,  shall  be  deemed  to  be a  representation  by  the  Borrower
     requesting  the Advance that the  conditions  set forth in Section 4.2 have
     been satisfied as of the time of the request.

     Section  2.2  Interest;   Minimum   Interest  Charge;   Default   Interest;
Participations; Usury.

          (a) Notes.  Except as set forth in  Sections  2.2(b) and  2.2(c),  the
     outstanding  principal  balances  of each Note shall bear  interest  at the
     Floating Rate.  Interest  accruing on the Notes shall be due and payable in
     arrears on the first day of each month.

          (b) Minimum  Interest  Charge.  Notwithstanding  the interest  payable
     pursuant to Section  2.2(a),  the Borrowers  jointly and severally agree to
     pay to the Lender  interest of not less than $2,750 per calendar month (the
     "Minimum  Interest  Charge")  during  the term of this  Agreement,  and the
     Borrowers shall pay any deficiency  between the Minimum Interest Charge and
     the amount of  interest  otherwise  calculated  under  Sections  2.2(a) and
     2.2(c) on the date and in the manner provided in Section 2.4.

          (c) Default  Interest Rate. At any time during any Default Period,  in
     the Lender's sole  discretion  and without  waiving any of its other rights
     and remedies,  the principal of the Advances  outstanding from time to time
     shall  bear  interest  at the  Default  Rate,  effective  for  any  periods
     designated by the Lender from time to time during that Default Period.

                                       9
<PAGE>


          (d) Participations. If any Person shall acquire a participation in the
     Advances  under this  Agreement,  the  Borrower  shall be  obligated to the
     Lender to pay the full amount of all interest calculated under , along with
     all other  fees,  charges  and other  amounts  due  under  this  Agreement,
     regardless  if such Person  elects to accept  interest  with respect to its
     participation  at a lower rate than the Floating Rate, or otherwise  elects
     to accept  less than its pro rata  share of such  fees,  charges  and other
     amounts due under this Agreement.

          (e) Usury.  In any event no rate change shall be put into effect which
     would  result in a rate  greater  than the highest  rate  permitted by law.
     Notwithstanding  anything to the contrary  contained in any Loan  Document,
     all  agreements  which  either  now are or which  shall  become  agreements
     between  either  Borrower  and the Lender are hereby  limited so that in no
     contingency or event  whatsoever  shall the total liability for payments in
     the nature of interest,  additional  interest and other charges  exceed the
     applicable  limits imposed by any applicable usury laws. If any payments in
     the nature of interest,  additional  interest and other  charges made under
     any Loan  Document  are held to be in excess of the  limits  imposed by any
     applicable  usury  laws,  it is agreed  that any such  amount held to be in
     excess  shall  be  considered  payment  of  principal  hereunder,  and  the
     indebtedness  evidenced  hereby shall be reduced by such amount so that the
     total liability for payments in the nature of interest, additional interest
     and other charges  shall not exceed the  applicable  limits  imposed by any
     applicable  usury laws, in compliance with the desires of the Borrowers and
     the Lender.  This  provision  shall never be superseded or waived and shall
     control  every other  provision of the Loan  Documents  and all  agreements
     between either Borrower and the Lender, or their successors and assigns.

     Section 2.3 Fees

          (a) Origination  Fee. The Borrowers hereby jointly and severally agree
     to pay the Lender a fully  earned  and  non-refundable  origination  fee of
     $15,000,  of which  $10,000  shall be due and payable upon the execution of
     this Agreement and the remaining $5,000 shall be due and payable on October
     9, 1999.

          (b) Audit Fees. The Borrowers  hereby  jointly and severally  agree to
     pay the  Lender,  on demand,  audit fees in  connection  with any audits or
     inspections  conducted by the Lender of any Collateral or the operations or
     business of either Borrower at the rates  established  from time to time by
     the Lender as its audit fees  (which  fees are  currently  $60 per hour per
     auditor),  together  with  all  actual  out-of-pocket  costs  and  expenses
     incurred in conducting any such audit or inspection.

     Section  2.4  Computation  of  Interest  and Fees;  When  Interest  Due and
Payable.  Interest accruing on the outstanding principal balance of the Advances
and fees hereunder  outstanding from time to time shall be computed on the basis
of  actual  number of days  elapsed  in a year of 360  days.  Interest  shall be
payable in arrears on the first day of each month and on the Termination Date.

                                       10
<PAGE>


     Section 2.5 Capital Adequacy.  If any Related Lender determines at any time
that its Return has been reduced as a result of any Rule Change,  the  Borrowers
jointly and severally  agree to pay such Related Lender the amount  necessary to
restore its Return to what it would have been had there been no Rule Change. For
purposes of this Section 2.5:

          (a)  "Capital   Adequacy  Rule"  means  any  law,  rule,   regulation,
     guideline, directive, requirement or request regarding capital adequacy, or
     the  interpretation  or  administration  thereof  by  any  governmental  or
     regulatory  authority,  central bank or comparable  agency,  whether or not
     having the force of law,  that  applies to any Related  Lender.  Such rules
     include rules requiring financial institutions to maintain total capital in
     amounts  based  upon  percentages  of  outstanding   loans,   binding  loan
     commitments and letters of credit.

          (b) "Return",  for any period,  means the return as determined by such
     Related  Lender on the Advances  based upon its total capital  requirements
     and a  reasonable  attribution  formula  that takes  account of the Capital
     Adequacy  Rules then in effect.  Return may be calculated for each calendar
     quarter and for the shorter  period  between the end of a calendar  quarter
     and the date of termination in whole of this Agreement.

          (c) "Rule  Change"  means  any  change in any  Capital  Adequacy  Rule
     occurring after the date of this  Agreement,  but the term does not include
     any  changes  in  applicable  requirements  that at the  Closing  Date  are
     scheduled to take place under the existing  Capital  Adequacy  Rules or any
     increases in the capital that any Related Lender is required to maintain to
     the extent that the increases are required due to a regulatory  authority's
     assessment of the financial condition of such Related Lender.

          (d) "Related Lender" includes (but is not limited to) the Lender,  any
     parent  corporation  of the Lender and any  assignee of any interest of the
     Lender hereunder and any participant in the loans made hereunder.

Certificates  of any Related  Lender sent to either  Borrower  from time to time
claiming  compensation  under this Section 2.5,  stating the reason therefor and
setting forth in reasonable  detail the calculation of the additional  amount or
amounts to be paid to the Related  Lender  hereunder to restore its Return shall
be conclusive  absent manifest error. In determining  such amounts,  the Related
Lender may use any reasonable averaging and attribution methods.

     Section  2.6   Voluntary   Prepayment;   Reduction  of  the  Maximum  Line;
Termination of the Credit Facility by the Borrower. Except as otherwise provided
herein,  each Borrower may prepay the Advances in whole at any time or from time
to time in part.  The  Borrowers  may  terminate  this  Agreement  or reduce the
Maximum  Line at any time if they (i) give the  Lender  at least 30 days'  prior
written  notice  and (ii) pay the  Lender the  prepayment,  termination  or line
reduction  fees in  accordance  with  Section 2.7. If the  Borrowers  reduce the
Maximum Line to zero, all Obligations shall be immediately due and payable. Upon
termination  of  the  Credit   Facility  and  payment  and  performance  of  all
Obligations, the Lender shall release or terminate the Security Interest and the
Security Documents to which the Borrowers are entitled by law.

                                       11
<PAGE>


     Section 2.7  Termination,  Line  Reduction and Prepayment  Fees;  Waiver of
Termination, Prepayment and Line Reduction Fees.

          (a) Termination and Line Reduction Fees. If the Credit  Facilities are
     terminated for any reason as of a date other than the Maturity Date, or the
     Borrowers  reduce  the  Maximum  Line,  the  Borrowers  agree  jointly  and
     severally to pay to the Lender a fee in an amount equal to a percentage  of
     the Maximum Line (or the reduction,  as the case may be) as follows:  (i) 3
     percent (3%) if the termination or reduction  occurs on or before the first
     anniversary of the Funding Date;  (ii) two percent (2%) if the  termination
     or reduction occurs after the first  anniversary of the Funding Date but on
     or before the second anniversary of the Funding Date; and (iii) one percent
     (1%) if the termination or reduction occurs after the second anniversary of
     the Funding Date.

          (b) Waiver of  Termination,  Line Reduction and  Prepayment  Fees. The
     Borrowers will not be required to pay the  termination,  line reduction and
     prepayment  fees otherwise due under this Section 2.7 if such  termination,
     line  reduction  or  prepayment  is made  because  of  increased  cash flow
     generated from the Borrower's  operations or refinancing by an affiliate of
     the Lender.

     Section  2.8  Mandatory  Prepayment.  Without  notice  or  demand,  if  the
outstanding  principal  balance of the  Advances  shall at any time  exceed such
Borrower's  Borrowing Base, such Borrower shall immediately  prepay the Advances
to the extent  necessary to eliminate such excess.  Any payment  received by the
Lender  under  this  Section  2.8 or under  Section  2.6 may be  applied  to the
Obligations, in such order and in such amounts as the Lender, in its discretion,
may from time to time determine.

     Section  2.9  Payment.  All  payments  to  the  Lender  shall  be  made  in
immediately  available  funds and shall be  applied to the  Obligations  two (2)
Banking Days after  receipt by the Lender.  The Lender may hold all payments not
constituting  immediately  available  funds for two (2)  additional  days before
applying them to the Obligations.  Notwithstanding  anything in Section 2.1, the
Borrowers  hereby  authorize the Lender,  in its  discretion at any time or from
time to time without the Borrowers' request and even if the conditions set forth
in Section 4.2 would not be satisfied,  to make an Advance in an amount equal to
the portion of the Obligations from time to time due and payable.

     Section 2.10 Payment on Non-Banking  Days.  Whenever any payment to be made
hereunder  shall be stated to be due on a day which is not a Banking  Day,  such
payment may be made on the next  succeeding  Banking Day, and such  extension of
time  shall in such case be  included  in the  computation  of  interest  on the
Advances or the fees hereunder, as the case may be.

                                       12
<PAGE>


     Section  2.11 Use of  Proceeds.  The  Borrowers  shall use the  proceeds of
Advances for ordinary working capital purposes.

     Section 2.12 Liability Records.  The Lender may maintain from time to time,
at its  discretion,  liability  records as to each Borrower's  Obligations.  All
entries made on any such record shall be presumed  correct  until such  Borrower
establishes the contrary. Upon the Lender's demand, each Borrower will admit and
certify in writing the exact principal  balance of such  Borrower's  Obligations
that such  Borrower  then asserts to be  outstanding.  Any billing  statement or
accounting  rendered by the Lender shall be conclusive  and fully binding on the
applicable  Borrower  unless such  Borrower  gives the Lender  specific  written
notice of exception within 30 days after receipt.


                                  ARTICLE III

                      Security Interest; Occupancy; Setoff
                      ------------------------------------

     Section 3.1 Grant of  Security  Interest.  Each  Borrower  hereby  pledges,
assigns and grants to the Lender a security interest  (collectively  referred to
as the "Security  Interest") in the Collateral,  as security for the payment and
performance of such Borrower's Obligations.

     Section 3.2 Notification of Account Debtors and Other Obligors.  The Lender
may at any time (whether or not a Default Period then exists) notify any account
debtor or other  person  obligated  to pay the  amount  due that  such  right to
payment has been assigned or transferred to the Lender for security and shall be
paid directly to the Lender.  The  Borrowers  will join in giving such notice if
the Lender so requests.  At any time after  either  Borrower or the Lender gives
such notice to an account debtor or other obligor, the Lender may, but need not,
in the Lender's name or in such Borrower's name, (a) demand, sue for, collect or
receive any money or property at any time payable or  receivable  on account of,
or  securing,  any such right to payment,  or grant any  extension  to, make any
compromise  or settlement  with or otherwise  agree to waive,  modify,  amend or
change the obligations  (including  collateral  obligations) of any such account
debtor or other obligor; and (b) as such Borrower's agent and  attorney-in-fact,
notify the United  States  Postal  Service to change the address for delivery of
such  Borrower's  mail  to  any  address  designated  by the  Lender,  otherwise
intercept such Borrower's mail, and receive, open and dispose of such Borrower's
mail,  applying all Collateral as permitted under this Agreement and holding all
other mail for such Borrower's account or forwarding such mail to the Borrower's
last known address.

     Section 3.3 Assignment of Insurance. As additional security for the payment
and performance of the  Obligations,  each Borrower hereby assigns to the Lender
any and all monies  (including,  without  limitation,  proceeds of insurance and
refunds of unearned  premiums) due or to become due under,  and all other rights
of such  Borrower  with respect to, any and all policies of insurance  now or at
any time  hereafter  covering  the  Collateral  or any  evidence  thereof or any
business records or valuable papers pertaining thereto, and such Borrower hereby
directs  the issuer of any such  policy to pay all such  monies  directly to the
Lender. At any time, whether or not a Default Period then exists, the Lender may
(but need not), in the Lender's  name or in such  Borrower's  name,  execute and
deliver  proof of claim,  receive  all such  monies,  endorse  checks  and other
instruments   representing  payment  of  such  monies,  and  adjust,   litigate,
compromise or release any claim against the issuer of any such policy.

                                       13
<PAGE>


     Section 3.4 Occupancy.

          (a) Each Borrower hereby irrevocably grants to the Lender the right to
     take  possession  of the  Premises  of such  Borrower  at any time during a
     Default Period.

          (b)  The  Lender  may  use  the  Premises   only  to  hold,   process,
     manufacture, sell, use, store, liquidate, realize upon or otherwise dispose
     of goods that are  Collateral and for other purposes that the Lender may in
     good faith deem to be related or incidental purposes.

          (c) The Lender's  right to hold the Premises shall cease and terminate
     upon the earlier of (i) payment in full and  discharge  of all  Obligations
     and  termination of the  Commitment,  and (ii) final sale or disposition of
     all  goods  constituting  Collateral  and  delivery  of all  such  goods to
     purchasers.

          (d) The Lender  shall not be  obligated to pay or account for any rent
     or other  compensation  for the possession,  occupancy or use of any of the
     Premises; provided, however, that if the Lender does pay or account for any
     rent or other  compensation for the possession,  occupancy or use of any of
     the  Premises,  of a Borrower,  such  Borrower  shall  reimburse the Lender
     promptly for the full amount thereof. In addition,  such Borrower will pay,
     or reimburse the Lender for, all taxes, fees, duties, imposts,  charges and
     expenses at any time  incurred  by or imposed  upon the Lender by reason of
     the execution, delivery, existence, recordation, performance or enforcement
     of this Agreement or the provisions of this Section 3.4.

     Section 3.5  License.  Without  limiting the  generality  of the Patent and
Trademark  Security  Agreement,  each  Borrower  hereby  grants to the  Lender a
non-exclusive,  worldwide and royalty-free  license to use or otherwise  exploit
all trademarks, franchises, trade names, copyrights and patents of such Borrower
for the  purpose  of  selling,  leasing  or  otherwise  disposing  of any or all
Collateral during any Default Period.

     Section  3.6  Financing   Statement.   A  carbon,   photographic  or  other
reproduction  of this  Agreement or of any financing  statements  signed by each
Borrower is sufficient as a financing  statement and may be filed as a financing
statement in any state to perfect the security  interests  granted  hereby.  For
this purpose, the following information is set forth:

     Name and address of Debtors:

     Medical Dynamics, Inc.
     99 Inverness Drive East
     Englewood, CO  80111

                                       14
<PAGE>


     Federal Tax Identification No. 84-0631765

     Computer Age Dentist, Inc.
     99 Inverness Drive East
     Englewood, CO  80111

     Federal Tax Identification No. 95-4445531

     Name and address of Secured Party:
     Norwest Business Credit, Inc.
     1740 Broadway
     Denver, CO  80274-8625

     Section 3.7 Setoff. Each Borrower agrees that the Lender may at any time or
from time to time, at its sole  discretion and without demand and without notice
to anyone,  setoff any liability owed to either Borrower by the Lender,  whether
or not due,  against any  Obligation  of such  Borrower,  whether or not due. In
addition,  each other Person holding a participating interest in any Obligations
shall have the right to  appropriate  or setoff any  deposit or other  liability
then owed by such Person to either  Borrower,  whether or not due, and apply the
same to the payment of said participating  interest,  as fully as if such Person
had lent directly to such Borrower the amount of such participating interest.

                                   ARTICLE IV

                              Conditions of Lending
                              ---------------------

     Section 4.1  Conditions  Precedent  to the Initial  Advances.  The Lender's
obligation  to make the  initial  Advances  hereunder  shall be  subject  to the
condition  precedent  that the Lender shall have received all of the  following,
each in form and substance satisfactory to the Lender:

          (a) This Agreement, properly executed by the Borrowers.

          (b) The MDI Note,  properly executed by MDI and the CAD Note, properly
     executed by CAD.

          (c) A true and  correct  copy of any and all leases  pursuant to which
     either  Borrower  is  leasing  its  Premises,  together  with a  landlord's
     disclaimer and consent with respect to each such lease.

          (d) A true and  correct  copy of any and all  agreements  pursuant  to
     which either  Borrower's  property is in the possession of any Person other
     than such  Borrower,  together  with, in the case of any goods held by such
     Person for resale,  (i) a consignee's  acknowledgment  and waiver of liens,
     (ii) UCC financing statements sufficient to protect such Borrower's and the
     Lender's  interests in such goods,  and (iii) UCC searches  showing that no

                                       15
<PAGE>


     other secured party has filed a financing statement against such Person and
     covering  property similar to such Borrower's other than such Borrower,  or
     if there exists any such  secured  party,  evidence  that each such secured
     party has received  notice from such Borrower and the Lender  sufficient to
     protect such Borrower's and the Lender's interests in such Borrower's goods
     from any claim by such secured party.

          (e) An acknowledgment and agreement from each licensor in favor of the
     Lender,  together  with a true,  correct and  complete  copy of all license
     agreements.

          (f) Separate Collateral Account Agreements,  properly executed by each
     Borrower and Norwest Bank Colorado pursuant to which each Borrower and such
     bank establish a depository account (the "Collateral  Account") in the name
     of and under the sole and exclusive control of the Lender,  from which such
     bank  agrees  to  transfer  finally  collected  funds  to  the  Lender  for
     application to such Borrower's Obligations.

          (g) Separate Lockbox  Agreements,  properly  executed by each Borrower
     and Norwest Bank Colorado.

          (h) The Patent and Trademark Security Agreement,  properly executed by
     the Borrower.

          (i) Current searches of appropriate filing offices showing that (i) no
     state or federal  tax liens  have been  filed and remain in effect  against
     either  Borrower,  (ii) no financing  statements or assignments of patents,
     trademarks  or  copyrights  have been  filed and  remain in effect  against
     either  Borrower  except those  financing  statements  and  assignments  of
     patents,  trademarks or copyrights  relating to Permitted Liens or to liens
     held by Persons who have agreed in writing that upon receipt of proceeds of
     the  Advances,  they will  deliver UCC  releases  and/or  terminations  and
     releases  of  such   assignments  of  patents,   trademarks  or  copyrights
     satisfactory  to the  Lender,  and  (iii)  the  Lender  has duly  filed all
     financing  statements  necessary to perfect the Security  Interest,  to the
     extent the Security Interest is capable of being perfected by filing.

          (j) Separate  certificates of each  Borrower's  Secretary or Assistant
     Secretary certifying as to (i) the resolutions of such Borrower's directors
     and, if required,  shareholders,  authorizing  the execution,  delivery and
     performance  of the  Loan  Documents,  (ii)  such  Borrower's  articles  of
     incorporation  and  bylaws,  and (iii) the  signatures  of such  Borrower's
     officers or agents authorized to execute and deliver the Loan Documents and
     other instruments, agreements and certificates, including Advance requests,
     on such Borrower's behalf.

          (k) Current certificates issued by the Secretary of State of Colorado,
     in the case of MDI, and  California,  in the case of CAD,  certifying  that
     each  Borrower  is  in  compliance   with  all  applicable   organizational
     requirements of such Borrower's state of incorporation.

                                       16
<PAGE>


          (l)  Evidence  that each  Borrower is duly  licensed or  qualified  to
     transact business in all jurisdictions  where the character of the property
     owned or leased or the nature of the business  transacted  by it makes such
     licensing or qualification necessary.

          (m) A certificate  of an officer of each Borrower  confirming,  in his
     personal capacity,  the representations and warranties set forth in Article
     V.

          (n)  Separate  support  agreements  in favor of the  Lender,  properly
     executed by Van A. Horsley and Edward Boggs, each in his personal capacity.

          (o) An opinion of counsel to the Borrowers, addressed to the Lender.

          (p) Certificates of the insurance required hereunder,  with all hazard
     insurance  containing a lender's loss payable  endorsement  in the Lender's
     favor and with all liability  insurance  naming the Lender as an additional
     insured.

          (q) Evidence that,  immediately  after the initial Advances and taking
     into  account  the  contemplated  uses of the  proceeds  of such  Advances,
     Availability will exceed $350,000, in the aggregate.

          (r) Evidence acceptable to the Lender in its sole discretion that each
     Borrower  has paid all taxes,  including  taxes on real  property,  due and
     owing on or before the date hereof.

          (s)  Payment of the fees and  commissions  due through the date of the
     initial  Advance  under  Section  2.3 and  expenses  incurred by the Lender
     through  such date and required to be paid by the  Borrower  under  Section
     9.6,  including  all  legal  expenses  incurred  through  the  date of this
     Agreement.

          (t) Such  other  documents  as the Lender in its sole  discretion  may
     require.

     Section 4.2 Conditions  Precedent to All Advances.  The Lender's obligation
to make each Advance shall be subject to the further  conditions  precedent that
on such date:

          (a) the  representations  and  warranties  contained  in Article V are
     correct on and as of the date of such  Advance as though  made on and as of
     such date,  except to the extent that such  representations  and warranties
     relate solely to an earlier date; and

          (b) no event has occurred and is continuing, or would result from such
     Advance which constitutes a Default or an Event of Default.

                                       17
<PAGE>


                                   ARTICLE V

                         Representations and Warranties
                         ------------------------------

     The Borrowers  hereby  jointly and  severally  represent and warrant to the
Lender as follows:

     Section 5.1 Corporate  Existence and Power;  Name; Chief Executive  Office;
Inventory  and  Equipment  Locations;   Tax  Identification  Number.  MDI  is  a
corporation,  duly  organized,  validly  existing and in good standing under the
laws of the State of Colorado and CDI is a corporation  duly organized,  validly
existing and in good standing under the laws of the State of California and each
Borrower is duly licensed or qualified to transact business in all jurisdictions
where  the  character  of the  property  owned or  leased  or the  nature of the
business transacted by it makes such licensing or qualification necessary.  Each
Borrower has all  requisite  power and  authority,  corporate or  otherwise,  to
conduct its business,  to own its properties and to execute and deliver,  and to
perform all of its obligations under, the Loan Documents.  During its existence,
each Borrower has done business solely under the names set forth in Schedule 5.1
hereto.  Each Borrower's  chief executive office and principal place of business
is located at the  address set forth in  Schedule  5.1  hereto,  and all of each
Borrower's  records  relating to its business or the Collateral are kept at that
location.  All  Inventory and Equipment is located at that location or at one of
the other  locations  set forth in Schedule  5.1  hereto.  Each  Borrower's  tax
identification number is correctly set forth in Section 3.6 hereto.

     Section  5.2  Authorization  of  Borrowing;   No  Conflict  as  to  Law  or
Agreements. The execution, delivery and performance by each Borrower of the Loan
Documents  and the  borrowings  from  time  to time  hereunder  have  been  duly
authorized by all necessary corporate action and do not and will not (i) require
any consent or  approval of either  Borrower's  stockholders;  (ii)  require any
authorization,  consent or approval by, or  registration,  declaration or filing
with, or notice to, any  governmental  department,  commission,  board,  bureau,
agency or instrumentality,  domestic or foreign, or any third party, except such
authorization, consent, approval, registration, declaration, filing or notice as
has been obtained, accomplished or given prior to the date hereof; (iii) violate
any  provision of any law, rule or regulation  (including,  without  limitation,
Regulation X of the Board of Governors of the Federal  Reserve System) or of any
order,  writ,  injunction or decree presently in effect having  applicability to
either Borrower or of either  Borrower's  articles of  incorporation  or bylaws;
(iv) result in a breach of or  constitute a default  under any indenture or loan
or credit  agreement or any other  material  agreement,  lease or  instrument to
which either  Borrower is a party or by which it or its  properties may be bound
or affected;  or (v) result in, or require,  the creation or  imposition  of any
mortgage,  deed of trust,  pledge,  lien,  security  interest or other charge or
encumbrance  of any  nature  (other  than the  Security  Interest)  upon or with
respect  to any of the  properties  now owned or  hereafter  acquired  by either
Borrower.

     Section 5.3 Legal  Agreements.  This  Agreement  constitutes  and, upon due
execution by the Borrowers  executing the same,  the other Loan  Documents  will
constitute the legal, valid and binding  obligations of the Borrowers  executing
the same,  enforceable against such Borrower in accordance with their respective
terms.

                                       18
<PAGE>


     Section 5.4 Subsidiaries.  Except as set forth in Schedule 5.4 hereto,  the
Borrowers have no Subsidiaries.

     Section 5.5 Financial  Condition;  No Adverse  Change.  The Borrowers  have
heretofore  furnished  to the Lender its audited  financial  statements  for its
fiscal year ended September 30, 1997 and its unaudited financial  statements for
the fiscal year-to-date period ended August 31, 1998 and those statements fairly
present each Borrower's financial condition on the dates thereof and the results
of such Borrower's operations and cash flows for the periods then ended and were
prepared in accordance with generally accepted accounting principles.  Since the
date of the most recent financial statements, there has been no material adverse
change in either  Borrower's  business,  properties  or condition  (financial or
otherwise).

     Section 5.6 Litigation.  There are no actions, suits or proceedings pending
or, to the Borrowers' knowledge, threatened against or affecting either Borrower
or any of its  Affiliates or the  properties of either  Borrower or any of their
Affiliates  before  any court or  governmental  department,  commission,  board,
bureau,  agency or  instrumentality,  domestic or foreign,  which, if determined
adversely  to such  Borrower  or any of its  Affiliates,  would  have a material
adverse  effect on the financial  condition,  properties or operations of either
Borrower or any of their Affiliates.

     Section 5.7  Regulation  U. Neither  Borrower is engaged in the business of
extending  credit for the purpose of purchasing or carrying margin stock (within
the meaning of  Regulation U of the Board of  Governors  of the Federal  Reserve
System),  and no part of the proceeds of any Advance will be used to purchase or
carry  any  margin  stock or to  extend  credit to  others  for the  purpose  of
purchasing or carrying any margin stock.

     Section 5.8 Taxes.  Each Borrower and its Affiliates have paid or caused to
be paid to the proper  authorities  when due all federal,  state and local taxes
required to be withheld by each of them.  Each Borrower and its Affiliates  have
filed all  federal,  state and local tax returns  which to the  knowledge of the
officers of such Borrower or any Affiliate,  as the case may be, are required to
be filed, and such Borrower and its Affiliates have paid or caused to be paid to
the respective  taxing  authorities all taxes as shown on said returns or on any
assessment received by any of them to the extent such taxes have become due.

     Section 5.9 Titles and Liens.  Each Borrower has good and absolute title to
all Collateral  described in the collateral  reports  provided to the Lender and
all other  Collateral,  properties and assets  reflected in the latest financial
statements  referred to in Section 5.5 and all proceeds thereof,  free and clear
of all  mortgages,  security  interests,  liens  and  encumbrances,  except  for
Permitted  Liens. No financing  statement naming either Borrower as debtor is on
file in any office except to perfect only Permitted Liens.

     Section 5.10 Plans.  Except as disclosed to the Lender in writing  prior to
the date hereof,  neither Borrower nor any of their Affiliates  maintains or has
maintained any Plan.  Neither Borrower nor any Affiliate has received any notice
or has any knowledge to the effect that it is not in full compliance with any of

                                       19
<PAGE>


the  requirements  of ERISA.  No Reportable  Event or other fact or circumstance
which may have an adverse  effect on the Plan's tax  qualified  status exists in
connection with any Plan. Neither Borrower nor any of their Affiliates has:

          (a) Any accumulated funding deficiency within the meaning of ERISA; or

          (b) Any  liability or knows of any fact or  circumstances  which could
     result in any liability to the Pension Benefit  Guaranty  Corporation,  the
     Internal  Revenue  Service,  the Department of Labor or any  participant in
     connection  with any Plan (other than accrued  benefits  which or which may
     become payable to participants or beneficiaries of any such Plan).

     Section 5.11 Default. Each Borrower is in compliance with all provisions of
all  agreements,  instruments,  decrees  and orders to which it is a party or by
which it or its  property is bound or  affected,  the breach or default of which
could have a material  adverse effect on such  Borrower's  financial  condition,
properties or operations.

     Section 5.12 Environmental Matters

          (a) Definitions.  As used in this Agreement, the following terms shall
     have the following meanings:

               (i) "Environmental Law" means any federal,  state, local or other
          governmental  statute,  regulation,  law or ordinance dealing with the
          protection of human health and the environment.

               (ii)  "Hazardous  Substances"  means  pollutants,   contaminants,
          hazardous  substances,   hazardous  wastes,  petroleum  and  fractions
          thereof,  and all other  chemicals,  wastes,  substances and materials
          listed in, regulated by or identified in any Environmental Law.

          (b) To the Borrowers' best knowledge,  there are not present in, on or
     under the Premises any Hazardous  Substances in such form or quantity as to
     create any  liability  or  obligation  for either of the  Borrowers  or the
     Lender under common law of any jurisdiction or under any Environmental Law,
     and no Hazardous Substances have ever been stored, buried, spilled, leaked,
     discharged,  emitted or released in, on or under the Premises in such a way
     as to create any such liability.

          (c) To the Borrowers' best knowledge, neither Borrower has disposed of
     Hazardous  Substances in such a manner as to create any liability under any
     Environmental Law.

          (d) There  are not and there  never  have been any  requests,  claims,
     notices, investigations,  demands, administrative proceedings,  hearings or
     litigation,  relating  in any  way  to the  Premises  or  either  Borrower,
  

                                       20
<PAGE>


     alleging   liability  under,   violation  of,  or  noncompliance  with  any
     Environmental  Law or any  license,  permit or other  authorization  issued
     pursuant  thereto.  To the  Borrowers'  best  knowledge,  no such matter is
     threatened or impending.

          (e) To the Borrowers' best knowledge,  each Borrower's  businesses are
     and  have  in the  past  always  been  conducted  in  accordance  with  all
     Environmental  Laws and all  licenses,  permits  and  other  authorizations
     required pursuant to any Environmental Law and necessary for the lawful and
     efficient  operation of such businesses are in such  Borrower's  possession
     and  are  in  full  force  and  effect.   No  permit   required  under  any
     Environmental  Law is scheduled to expire  within 12 months and there is no
     threat  that any such  permit  will be  withdrawn,  terminated,  limited or
     materially changed.

          (f) To the Borrowers' best  knowledge,  the Premises are not and never
     have  been  listed  on the  National  Priorities  List,  the  Comprehensive
     Environmental  Response,  Compensation and Liability  Information System or
     any similar  federal,  state or local list,  schedule,  log,  inventory  or
     database.

          (g)  The  Borrowers  have   delivered  to  Lender  all   environmental
     assessments,   audits,  reports,  permits,  licenses  and  other  documents
     describing  or  relating in any way to the  Premises  or either  Borrower's
     businesses.

     Section 5.13  Submissions  to Lender.  All financial and other  information
provided  to the Lender by or on behalf of a Borrower  in  connection  with such
Borrower's  request for the credit  facilities  contemplated  hereby is true and
correct in all material respects and, as to projections,  valuations or proforma
financial  statements,  present a good  faith  opinion  as to such  projections,
valuations and proforma condition and results.

     Section 5.14 Financing Statements. Each Borrower has provided to the Lender
signed  financing  statements  sufficient  when  filed to perfect  the  Security
Interest and the other  security  interests  created by the Security  Documents.
When such  financing  statements  are filed in the offices  noted  therein,  the
Lender will have a valid and perfected  security  interest in all Collateral and
all other  collateral  described in the Security  Documents  which is capable of
being perfected by filing financing statements.  None of the Collateral or other
collateral covered by the Security Documents is or will become a fixture on real
estate, unless a sufficient fixture filing is in effect with respect thereto.

     Section 5.15 Rights to Payment.  Each right to payment and each instrument,
document,   chattel  paper  and  other  agreement   constituting  or  evidencing
Collateral or other collateral  covered by the Security Documents is (or, in the
case of all future Collateral or such other collateral,  will be when arising or
issued) the valid,  genuine and legally  enforceable  obligation,  subject to no
defense,  setoff or  counterclaim,  of the account debtor or other obligor named
therein or in the Borrowers'  records  pertaining  thereto as being obligated to
pay such obligation.

                                       21

<PAGE>

                                   ARTICLE VI

                        Borrowers' Affirmative Covenants
                        --------------------------------

     So long as either Borrower's Obligations shall remain unpaid, or the Credit
Facility shall remain outstanding,  the Borrowers jointly and severally agree to
comply  with the  following  requirements,  unless  the Lender  shall  otherwise
consent in writing:

     Section 6.1 Reporting Requirements. The Borrowers will deliver, or cause to
be delivered,  to the Lender each of the  following,  which shall be in form and
detail acceptable to the Lender:

          (a) as soon as  available,  and in any event  within 90 days after the
     end of each fiscal year of the Borrowers,  the Borrowers' audited financial
     statements with the  unqualified  opinion of independent  certified  public
     accountants  selected by the Borrowers and acceptable to the Lender,  which
     annual   financial   statements   shall   include  the   consolidated   and
     consolidating  balance sheets of the Borrowers as at the end of such fiscal
     year and the related statements of the Borrowers' income, retained earnings
     and cash flows for the fiscal year then ended,  prepared on a consolidating
     and consolidated basis, all in reasonable detail and prepared in accordance
     with GAAP,  together with (i) copies of all management  letters prepared by
     such accountants;  (ii) a report signed by such accountants stating that in
     making the  investigations  necessary  for said  opinion  they  obtained no
     knowledge,  except  as  specifically  stated,  of any  Default  or Event of
     Default  hereunder and all relevant facts in reasonable detail to evidence,
     and the  computations as to, whether or not the Borrowers are in compliance
     with the requirements set forth in Sections 6.12, 6.13, and 7.10; and (iii)
     a certificate of each Borrower's chief financial  officer stating that such
     financial statements have been prepared in accordance with GAAP and whether
     or not such officer has knowledge of the occurrence of any Default or Event
     of Default  hereunder  and, if so,  stating in reasonable  detail the facts
     with respect thereto;

          (b) as soon as available and in any event within 30 days after the end
     of each month, an unaudited internal balance sheet and statements of income
     and retained  earnings of each Borrower as at the end of and for such month
     and for the year to date period then ended, prepared on a consolidating and
     consolidated  basis in reasonable  detail,  all prepared in accordance with
     GAAP,  subject  to  year-end  audit  adjustments;   and  accompanied  by  a
     certificate of each Borrower's  chief financial  officer,  substantially in
     the form of Exhibit B hereto  stating  (i) that such  financial  statements
     have been  prepared in  accordance  with GAAP,  subject to  year-end  audit
     adjustments,  (ii)  whether  or  not  such  officer  has  knowledge  of the
     occurrence  of any Default or Event of Default  hereunder  not  theretofore
     reported and remedied and, if so,  stating in  reasonable  detail the facts
     with respect thereto,  and (iii) all relevant facts in reasonable detail to
     evidence,  and the  computations as to, whether or not the Borrowers are in
     compliance  with the  requirements  set forth in Sections  6.12,  6.13, and
     7.10;

                                       22
<PAGE>




          (c)  immediately,  proof of shipment on any invoice of either Borrower
     in an amount greater than $2,000;

          (d) weekly, sales assignment and cash collection reports and any other
     accounts receivable adjustment registers of each Borrower;

          (e) within 15 days after the end of each month or more  frequently  if
     the Lender so requires,  agings of each Borrower's  accounts receivable and
     its  accounts  payable,  and a  calculation  of each  Borrower's  Accounts,
     Eligible Accounts, as at the end of such month or shorter time period;

          (f) on the  first  day of  each  fiscal  year of  each  Borrower,  the
     projected balance sheets and income statements for each month of such year,
     each  in  reasonable  detail,   representing  each  Borrower's  good  faith
     projections  and certified by each Borrower's  chief  financial  officer as
     being  the  most  accurate  projections  available  and  identical  to  the
     projections used by each Borrower for internal planning purposes,  together
     with such  supporting  schedules and  information  as the Lender may in its
     discretion require;

          (g) immediately after the commencement  thereof,  notice in writing of
     all litigation and of all proceedings before any governmental or regulatory
     agency  affecting  either Borrower of the type described in Section 5.12 or
     which seek a monetary recovery against the Borrower in excess of $20,000;

          (h) as promptly as  practicable  (but in any event not later than five
     business days) after an officer of either Borrower obtains knowledge of the
     occurrence  of any breach,  default or event of default  under any Security
     Document  or any event  which  constitutes  a Default  or Event of  Default
     hereunder, notice of such occurrence, together with a detailed statement by
     a  responsible  officer of such  Borrower  of the steps being taken by such
     Borrower to cure the effect of such breach, default or event;

          (i) as soon as possible  and in any event  within 30 days after either
     Borrower knows or has reason to know that any Reportable Event with respect
     to any Plan has occurred,  the statement of such Borrower's chief financial
     officer  setting forth details as to such  Reportable  Event and the action
     which such Borrower proposes to take with respect thereto,  together with a
     copy of the notice of such Reportable Event to the Pension Benefit Guaranty
     Corporation;

          (j) as soon as possible,  and in any event within 10 days after either
     Borrower fails to make any quarterly  contribution required with respect to
     any Plan under  Section  412(m) of the Internal  Revenue  Code of 1986,  as
     amended,  the statement of such Borrower's chief financial  officer setting
     forth  details  as to such  failure  and the  action  which  such  Borrower
     proposes to take with respect  thereto,  together with a copy of any notice
     of such  failure  required to be provided to the Pension  Benefit  Guaranty
     Corporation;

                                       23
<PAGE>


          (k) promptly  upon  knowledge  thereof,  notice of (i) any disputes or
     claims by a customer of either Borrower  exceeding  $5,000  individually or
     $10,000 in the aggregate  during any fiscal year; (ii) credit memos;  (iii)
     any goods  returned to or recovered  by a Borrower;  and (iv) any change in
     the persons constituting either Borrower's officers and directors;

          (l) promptly upon knowledge thereof, notice of any loss of or material
     damage  to any  Collateral  or other  collateral  covered  by the  Security
     Documents or of any  substantial  adverse  change in any Collateral or such
     other collateral or the prospect of payment thereof;

          (m)  promptly  upon  their  distribution,   copies  of  all  financial
     statements,  reports and proxy  statements which either Borrower shall have
     sent to its stockholders;

          (n)  promptly  after  the  sending  or filing  thereof,  copies of all
     regular and  periodic  reports  which either  Borrower  shall file with the
     Securities and Exchange Commission or any national securities exchange;

          (m)  promptly  upon  knowledge  thereof,  notice of either  Borrower's
     violation of any law, rule or  regulation,  the  non-compliance  with which
     could  materially  and  adversely  affect such  Borrower's  business or its
     financial condition;

          (m) promptly after the issuance thereof,  copies of all press releases
     issued by either Borrower; and

          (n)  from  time  to  time,  with  reasonable  promptness,  any and all
     receivables  schedules,  collection  reports,  deposit  records,  equipment
     schedules,  copies of invoices to account debtors,  shipment  documents and
     delivery receipts for goods sold, and such other material, reports, records
     or information as the Lender may request.

     Section 6.2 Books and Records;  Inspection and  Examination.  Each Borrower
will keep  accurate  books of record and  account for itself  pertaining  to the
Collateral and pertaining to such  Borrower's  business and financial  condition
and such other matters as the Lender may from time to time request in which true
and complete entries will be made in accordance with GAAP and, upon the Lender's
request,  will permit any  officer,  employee,  attorney or  accountant  for the
Lender to audit,  review,  make  extracts from or copy any and all corporate and
financial  books and  records  of such  Borrower  at all times  during  ordinary
business  hours,  to send and discuss  with account  debtors and other  obligors
requests for verification of amounts owed to such Borrower,  and to discuss such
Borrower's  affairs with any of its  directors,  officers,  employees or agents.
Each Borrower will permit the Lender, or its employees,  accountants,  attorneys
or agents,  to examine and inspect any Collateral,  other collateral  covered by
the Security Documents or any other property of such Borrower at any time during
ordinary business hours.

     Section 6.3 Account Verification.  The Lender may at any time and from time
to time send or require  each  Borrower to send  requests  for  verification  of
accounts or notices of assignment  to account  debtors and other  obligors.  The
Lender may also at any time and from time to time telephone  account debtors and
other obligors to verify accounts.

                                       24
<PAGE>


     Section 6.4 Compliance with Laws

          (a) Each Borrower will (i) comply with the  requirements of applicable
     laws and regulations,  the  non-compliance  with which would materially and
     adversely  affect its business or its financial  condition and (ii) use and
     keep the  Collateral,  and require that others use and keep the Collateral,
     only for lawful purposes,  without violation of any federal, state or local
     law, statute or ordinance.

          (b)  Without  limiting  the  foregoing  undertakings,   each  Borrower
     specifically  agrees that it will comply with all applicable  Environmental
     Laws and obtain and comply with all permits, licenses and similar approvals
     required by any Environmental Laws, and will not generate,  use, transport,
     treat, store or dispose of any Hazardous  Substances in such a manner as to
     create any liability or obligation under the common law of any jurisdiction
     or any Environmental Law.

     Section 6.5 Payment of Taxes and Other  Claims.  Each  Borrower will pay or
discharge,  when due, (a) all taxes, assessments and governmental charges levied
or imposed upon it or upon its income or profits,  upon any properties belonging
to it (including,  without  limitation,  the  Collateral) or upon or against the
creation,  perfection or continuance of the Security Interest, prior to the date
on which  penalties  attach  thereto,  (b) all  federal,  state and local  taxes
required to be withheld  by it, and (c) all lawful  claims for labor,  materials
and  supplies  which,  if unpaid,  might by law become a lien or charge upon any
properties of such Borrower;  provided, that such Borrower shall not be required
to pay any such tax, assessment,  charge or claim whose amount, applicability or
validity is being  contested in good faith by  appropriate  proceedings  and for
which proper reserves have been made.

     Section 6.6 Maintenance of Properties

          (a) Each  Borrower  will keep and maintain the  Collateral,  the other
     collateral  covered  by  the  Security  Documents  and  all  of  its  other
     properties  necessary or useful in its business in good  condition,  repair
     and working  order  (normal wear and tear  excepted)  and will from time to
     time  replace  or repair any worn,  defective  or broken  parts;  provided,
     however,  that nothing in this Section 6.6 shall  prevent  either  Borrower
     from  discontinuing  the operation and maintenance of any of its properties
     if such  discontinuance  is, in the  Lender's  judgment,  desirable  in the
     conduct of such Borrower's business and not disadvantageous in any material
     respect to the Lender.

          (b) Each  Borrower  will defend the  Collateral  against all claims or
     demands of all persons  (other than the Lender)  claiming the Collateral or
     any interest therein.

                                       25
<PAGE>


          (c) Each  Borrower  will  keep all  Collateral  and  other  collateral
     covered by the Security Documents free and clear of all security interests,
     liens and encumbrances except Permitted Liens.

     Section 6.7 Insurance.  Each Borrower will obtain and at all times maintain
insurance  with  insurers  believed  by  such  Borrower  to be  responsible  and
reputable,  in such  amounts and against  such risks as may from time to time be
required by the Lender, but in all events in such amounts and against such risks
as is usually  carried by  companies  engaged  in  similar  business  and owning
similar  properties in the same general  areas in which such Borrower  operates.
Without  limiting the  generality  of the  foregoing,  each Borrower will at all
times keep all tangible  Collateral  insured  against  risks of fire  (including
so-called extended  coverage),  theft,  collision (for Collateral  consisting of
motor  vehicles)  and such  other  risks and in such  amounts  as the Lender may
reasonably  request,  with any loss  payable  to the Lender to the extent of its
interest,  and all  policies of such  insurance  shall  contain a lender's  loss
payable  endorsement  for the Lender's  benefit  acceptable  to the Lender.  All
policies of liability  insurance  required hereunder shall name the Lender as an
additional insured.

     Section 6.8  Preservation  of  Existence.  Each  Borrower will preserve and
maintain  its  existence  and  all  of its  rights,  privileges  and  franchises
necessary or desirable in the normal  conduct of its business and shall  conduct
its business in an orderly, efficient and regular manner.

     Section 6.9 Delivery of Instruments,  etc. Upon request by the Lender, each
Borrower  will  promptly  deliver  to the  Lender  in  pledge  all  instruments,
documents and chattel papers constituting Collateral,  duly endorsed or assigned
by such Borrower.

     Section 6.10 Collateral Account.

          (a) If,  notwithstanding  the instructions to debtors to make payments
     to the Lockbox, either Borrower receives any payments on Receivables,  such
     Borrower  shall  deposit  such  payments  into  the  applicable  Collateral
     Account. Until so deposited,  such Borrower shall hold all such payments in
     trust for and as the  property of the Lender and shall not  commingle  such
     payments with any of its other funds or property.

          (b)  Amounts  deposited  in the  Collateral  Accounts  shall  not bear
     interest and shall not be subject to withdrawal by Borrowers,  except after
     full payment and discharge of all Obligations.

          (c) All deposits in the Collateral  Accounts shall constitute proceeds
     of Collateral  and shall not  constitute  payment of the  Obligations.  The
     Lender from time to time at its  discretion  may,  after  allowing  two (2)
     Banking Days for collection plus two (2) Banking Days for processing, apply
     deposited funds in each Collateral Account to the payment of the applicable
     Obligations,  in any  order or manner of  application  satisfactory  to the
     Lender, by transferring such funds to the Lender's general account.

                                       26
<PAGE>



          (d) All items deposited in the Collateral Accounts shall be subject to
     final  payment.  If any such item is returned  uncollected,  the applicable
     Borrower  will  immediately  pay the Lender,  or, for items  deposited in a
     Collateral Account,  the bank maintaining such account,  the amount of that
     item, or such bank at its  discretion  may charge any  uncollected  item to
     such Borrower's commercial account or other account. Each Borrower shall be
     liable as an endorser on all items  deposited in the applicable  Collateral
     Account, whether or not in fact endorsed by such Borrower.

     Section  6.11  Performance  by the Lender.  If either  Borrower at any time
fails to perform or observe any of the  foregoing  covenants  contained  in this
Article VI or elsewhere herein,  and if such failure shall continue for a period
of ten calendar days after the Lender gives such Borrower written notice thereof
(or in the case of the  agreements  contained  in  Sections  6.5,  6.7 and 6.10,
immediately  upon the  occurrence  of such failure,  without  notice or lapse of
time),  the Lender may, but need not, perform or observe such covenant on behalf
and in the name,  place and stead of such Borrower (or, at the Lender's  option,
in the  Lender's  name) and may,  but need not,  take any and all other  actions
which the Lender may  reasonably  deem necessary to cure or correct such failure
(including,  without  limitation,  the  payment of taxes,  the  satisfaction  of
security interests,  liens or encumbrances,  the performance of obligations owed
to  account  debtors or other  obligors,  the  procurement  and  maintenance  of
insurance,  the  execution of  assignments,  security  agreements  and financing
statements,  and the  endorsement  of  instruments);  and  such  Borrower  shall
thereupon pay to the Lender on demand the amount of all monies  expended and all
costs and expenses  (including  reasonable  attorneys'  fees and legal expenses)
incurred by the Lender in connection  with or as a result of the  performance or
observance  of such  agreements  or the  taking of such  action  by the  Lender,
together with interest thereon from the date expended or incurred at the highest
rate of  interest  then  applicable  to the  Advances  made  pursuant to Section
2.1(a).  To facilitate the Lender's  performance or observance of such covenants
of the Borrowers,  each Borrower hereby irrevocably  appoints the Lender, or the
Lender's  delegate,  acting alone,  as such  Borrower's  attorney in fact (which
appointment  is coupled with an interest) with the right (but not the duty) from
time to time to create, prepare, complete,  execute, deliver, endorse or file in
the name and on  behalf of such  Borrower  any and all  instruments,  documents,
assignments,   security  agreements,  financing  statements,   applications  for
insurance and other agreements and writings  required to be obtained,  executed,
delivered or endorsed by such Borrower under this Section 6.11.

     Section 6.12 Minimum Book Net Worth.  The Borrowers will  maintain,  during
each period  described  below,  consolidated  Book Net Worth plus the  aggregate
amount of any convertible  indebtedness  which is outstanding on the date hereof
as set forth on Schedule 7.2 hereof,  determined as at the end of each month, at
an amount not less than the amount set forth opposite such period:

                        Period                          Minimum Book Net Worth
                        ------                          ----------------------
      September 1, 1998 through November 30, 1998             $5,000,000
      December 1, 1998 through February 28, 1999              $4,650,000
          March 1, 1999 through May 30, 1999                  $4,300,000
   June 1, 1999 through June 30, 1999, and each 
                   month thereafter                           $4,400,000

                                       27
<PAGE>


     Section 6.13 Minimum EBITDA.  The Borrowers will achieve during each period
described  below,  consolidated  EBITDA,  of not less than the  amount set forth
opposite such period (amounts in [ ] indicate a negative number):

                  Period                                   Minimum EBITDA
                  ------                                   --------------

   Three months ended September 30, 1998                     $[850,000]
    Three months ended December 31, 1998                     $[150,000]
      Three months ended March 31, 1999                      $[100,000]
     Three months ended June 30, 1999                        $ 250,000
   Three months ended September 30, 1999
   and each calendar quarter thereafter                      $ 150,000

     Section 6.14 New  Covenants.  On or before  November 1, 1999, the Borrowers
and the  Lender  shall  negotiate  in good faith as to new  covenant  levels for
Sections 6.12, 6.13 and 7.10 for periods after such date, provided,  however, if
the  Borrowers and Lender are unable to agree on such new covenant  levels,  the
Lender may establish  the new covenant  levels in its sole  discretion,  and the
failure of the  Borrowers to meet the new  covenant  levels shall be an Event of
Default hereunder.

     Section  6.15 Year 2000  Compliance  Program.  (a) Each  Borrower  will (i)
conduct a detailed  inventory and assessment of all of its computer hardware and
software systems and imbedded chip technology  (AInformation System@) and of its
business and  operations  that could be adversely  affected by its failure to be
Year 2000  Compliant on a timely  basis;  (ii)  develop,  fund,  and implement a
project plan to make its Information  Systems Year 2000 Compliant,  and complete
implementation  of the plan and the  remediation  and testing of its information
Systems no later than March 31, 1999;  and (iii) initiate a process to determine
whether its material  suppliers,  vendors,  and customers have taken  meaningful
steps to become Year 2000 Compliant on a timely basis, and develop and implement
a feasible contingency plan to ensure the uninterrupted and unimpaired operation
of its business in the event of the failure of the systems of such third parties
or of its own Information  Systems no later than March 31, 1999. For purposes of
this  covenant,  AYear 2000  Compliant@  means that the  Borrower's  Information
Systems that are material to its operations and financial condition will be able
to properly process date sensitive  functions before, on, and after December 31,
1999.

     (b) Each Borrower will provide to the Lender promptly upon receipt,  copies
of any  reports  or  management  letters  relating  to its Year 2000  compliance
project  and  contingency  plans,   either  prepared   internally,   by  outside
consultants  or by its  accountants,  and will  provide  such other  information
relating   to  its  Year  2000   compliance   efforts,   and  deliver  any  such
certifications  by its  officers  relating  thereto  as the  Lender  in its sole
discretion may deem appropriate.


                                  ARTICLE VII

                                       28
<PAGE>


                               Negative Covenants
                               ------------------

     So long as the Obligations  shall remain unpaid,  or the Credit  Facilities
shall  remain  outstanding,  the  Borrowers  jointly and  severally  agree that,
without the Lender's prior written consent:

     Section 7.1 Liens.  Neither Borrower will create,  incur or suffer to exist
any mortgage,  deed of trust,  pledge,  lien,  security interest,  assignment or
transfer  upon or of any of its  assets,  now owned or  hereafter  acquired,  to
secure  any  indebtedness;   excluding,  however,  from  the  operation  of  the
foregoing, the following (collectively, "Permitted Liens"):

          (a)  in the  case  of any of  the  Borrowers'  property  which  is not
     Collateral  or  other  collateral  described  in  the  Security  Documents,
     covenants,  restrictions,  rights,  easements and minor  irregularities  in
     title which do not materially  interfere  with the  Borrowers'  business or
     operations as presently conducted;

          (b) mortgages,  deeds of trust, pledges, liens, security interests and
     assignments  in  existence  on the date hereof and listed in  Schedule  7.1
     hereto,  securing  indebtedness  for borrowed money permitted under Section
     7.2;

          (c) the Security Interest and liens and security  interests created by
     the Security Documents; and

          (d) purchase money security  interests  relating to the acquisition of
     machinery and equipment of either Borrower not exceeding the lesser of cost
     or fair market  value  thereof and so long as no Default  Period is then in
     existence and none would exist immediately after such acquisition.

     Section 7.2 Indebtedness.  Neither Borrower will incur,  create,  assume or
permit to exist any indebtedness or liability on account of deposits or advances
or any  indebtedness  for  borrowed  money or letters  of credit  issued on such
Borrower's  behalf, or any other  indebtedness or liability  evidenced by notes,
bonds, debentures or similar obligations, except:

          (a) indebtedness arising hereunder;

          (b)  indebtedness of such Borrower in existence on the date hereof and
     listed in Schedule 7.2 hereto; and

          (c)  indebtedness  relating  to liens  permitted  in  accordance  with
     Section 7.1.

                                       29
<PAGE>


     Section 7.3 Guaranties. Neither Borrower will assume, guarantee, endorse or
otherwise  become  directly  or  contingently  liable  in  connection  with  any
obligations of any other Person, except:

          (a) the  endorsement  of negotiable  instruments  by such Borrower for
     deposit or collection  or similar  transactions  in the ordinary  course of
     business; and

          (b)   guaranties,   endorsements   and  other  direct  or   contingent
     liabilities  in  connection  with  the  obligations  of other  Persons,  in
     existence on the date hereof and listed in Schedule 7.2 hereto.

     Section 7.4 Investments and Subsidiaries

          (a) Neither  Borrower will purchase or hold  beneficially any stock or
     other  securities or evidences of indebtedness  of, make or permit to exist
     any loans or advances  to, or make any  investment  or acquire any interest
     whatsoever  in,  any  other  Person,  including  specifically  but  without
     limitation any partnership or joint venture, except:

               (i)  investments  in direct  obligations  of the United States of
          America or any agency or  instrumentality  thereof  whose  obligations
          constitute  full faith and credit  obligations of the United States of
          America having a maturity of one year or less, commercial paper issued
          by  U.S.  corporations  rated  "A-1"  or  "A-2"  by  Standard  & Poors
          Corporation  or  "P-1"  or  "P-2"  by  Moody's  Investors  Service  or
          certificates of deposit or bankers'  acceptances  having a maturity of
          one year or less  issued by  members  of the  Federal  Reserve  System
          having  deposits  in excess of  $100,000,000  (which  certificates  of
          deposit or  bankers'  acceptances  are fully  insured  by the  Federal
          Deposit Insurance Corporation);

               (ii) travel  advances or loans to the officers  and  employees of
          both  Borrowers  not exceeding at any one time an aggregate of $5,000;
          and

               (iii) advances in the form of progress payments, prepaid rent not
          exceeding one month or security deposits.

          (b) Neither  Borrower  will create or permit to exist any  Subsidiary,
     other than the Subsidiar(y)(ies) in existence on the date hereof and listed
     in Schedule 5.4.

     Section 7.5  Dividends.  Except as set forth below,  neither  Borrower will
declare or pay any dividends  (other than  dividends  payable solely in stock of
such  Borrower)  on any class of its stock or make any payment on account of the
purchase, redemption or other retirement of any shares of such stock or make any
distribution in respect thereof, either directly or indirectly.

     Section 7.6 Sale or Transfer of Assets;  Suspension of Business Operations.
Neither Borrower will sell, lease, assign,  transfer or otherwise dispose of (i)
the stock of any Subsidiary,  (ii) all or a substantial  part of its assets,  or

                                       30
<PAGE>


(iii) any Collateral or any interest therein (whether in one transaction or in a
series of  transactions) to any other Person other than the sale of Inventory in
the  ordinary  course of business  and will not  liquidate,  dissolve or suspend
business  operations.  Neither  Borrower  will not in any  manner  transfer  any
property without prior or present receipt of full and adequate consideration.

     Section 7.7 Consolidation and Merger; Asset Acquisitions.  Neither Borrower
will  consolidate  with or merge into any Person,  or permit any other Person to
merge into it, or acquire (in a transaction  analogous in purpose or effect to a
consolidation  or  merger)  all or  substantially  all the  assets  of any other
Person.

     Section  7.8 Sale and  Leaseback.  Neither  Borrower  will  enter  into any
arrangement, directly or indirectly, with any other Person whereby such Borrower
shall sell or  transfer  any real or  personal  property,  whether  now owned or
hereafter acquired, and then or thereafter rent or lease as lessee such property
or any part thereof or any other property which such Borrower intends to use for
substantially  the same  purpose  or  purposes  as the  property  being  sold or
transferred.

     Section 7.9  Restrictions  on Nature of  Business.  Neither  Borrower  will
engage in any line of business materially  different from that presently engaged
in by such Borrower and will not purchase, lease or otherwise acquire assets not
related to its business.

     Section 7.10 Capital Expenditures. The Borrowers will not incur or contract
to incur unfinanced Capital  Expenditures of more than $200,000 in the aggregate
during the Borrowers' fiscal year 1999, and zero thereafter.

     Section 7.11 Accounting. Neither Borrower will adopt any material change in
accounting  principles  other than as required by GAAP.  Neither  Borrower  will
adopt, permit or consent to any change in its fiscal year.

     Section 7.12 Descounts,  etc.  Neither Borrower will, after notice from the
Lender, grant any discount, credit or allowance to any customer of such Borrower
or accept  any return of goods  sold,  or at any time  (whether  before or after
notice from the Lender)  modify,  amend,  subordinate,  cancel or terminate  the
obligation of any account debtor or other obligor of such Borrower.

     Section 7.13 Defined  Benefit Pension Plans.  Neither  Borrower will adopt,
create,  assume or become a party to any defined  benefit  pension plan,  unless
disclosed to the Lender pursuant to Section 5.10.

     Section  7.14 Other  Defaults.  Neither  Borrower  will  permit any breach,
default or event of default to occur under any note, loan agreement,  indenture,
lease,  mortgage,  contract for deed,  security  agreement or other  contractual
obligation binding upon such Borrower.

                                       31
<PAGE>


     Section 7.15 Place of Business;  Name.  Neither  Borrower will transfer its
chief executive office or principal place of business, or move, relocate,  close
or sell any  business  location.  Neither  Borrower  will  permit  any  tangible
Collateral  or any records  pertaining  to the  Collateral  to be located in any
state or area in which,  in the event of such  location,  a financing  statement
covering  such  Collateral  would be  required  to be, but has not in fact been,
filed in order to perfect the Security  Interest.  Neither  Borrower will change
its name.

     Section  7.16  Organizational  Documents;  S  Corporation  Status.  Neither
Borrower will amend its certificate of incorporation,  articles of incorporation
or bylaws.  Neither Borrower will become an S Corporation  within the meaning of
the Internal Revenue Code of 1986, as amended.

     Section 7.17 Salaries.  Neither Borrower will pay excessive or unreasonable
salaries,  bonuses,  commissions,  consultant  fees or  other  compensation;  or
increase the salary, bonus,  commissions,  consultant fees or other compensation
of any director, officer or consultant, or any member of their families, by more
than 10% in any one year,  either  individually  or for all such  persons in the
aggregate, or pay any such increase from any source other than profits earned in
the year of payment.

     Section  7.18  Change in  Ownership.  CAD will not issue or sell any of its
stock so as to change the  percentage  of voting and  non-voting  stock owned by
each of CAD'S shareholders, and CAD will not permit or suffer to occur the sale,
transfer,  assignment,  pledge or other  disposition of any or all of its issued
and outstanding shares.

                                  ARTICLE VIII

                     Events of Default, Rights and Remedies
                     --------------------------------------

     Section 8.1 Events of Default.  "Event of Default",  wherever  used herein,
means any one of the following events:

          (a) Default in the payment of the  Obligations of either Borrower when
     they become due and payable;

          (b) Default in the payment of any fees, commissions, costs or expenses
     required to be paid by either Borrower under this Agreement;

          (c)  Default  in  the  performance,  or  breach,  of any  covenant  or
     agreement of either Borrower contained in this Agreement;

          (d) Either Borrower shall be or become insolvent,  or admit in writing
     its or his  inability  to pay its or his debts as they  mature,  or make an
     assignment for the benefit of creditors; or either Borrower shall apply for
     or consent to the appointment of any receiver,  trustee, or similar officer
     for it or for  all  or any  substantial  part  of  its  property;  or  such
     receiver,  trustee  or  similar  officer  shall be  appointed  without  the
     application  or  consent  of  either  Borrower;  or either  Borrower  shall

                                       32
<PAGE>


     institute  (by petition,  application,  answer,  consent or otherwise)  any
     bankruptcy, insolvency, reorganization,  arrangement, readjustment of debt,
     dissolution,  liquidation  or similar  proceeding  relating to it under the
     laws of any  jurisdiction;  or any such proceeding  shall be instituted (by
     petition,  application  or  otherwise)  against  either  Borrower;  or  any
     judgment, writ, warrant of attachment or execution or similar process shall
     be issued or levied  against a  substantial  part of the property of either
     Borrower;

          (e) A petition shall be filed by or against either  Borrower under the
     United States Bankruptcy Code naming either Borrower;

          (f) Any  representation  or warranty  made by either  Borrower in this
     Agreement,  or by  either  Borrower  (or  any  of  their  officers)  in any
     agreement,   certificate,   instrument  or  financial  statement  or  other
     statement contemplated by or made or delivered pursuant to or in connection
     with this  Agreement  shall prove to have been  incorrect  in any  material
     respect when deemed to be effective;

          (g) The rendering against either Borrower of a final judgment,  decree
     or order for the payment of money in excess of $20,000 and the  continuance
     of such judgment,  decree or order unsatisfied and in effect for any period
     of 30 consecutive days without a stay of execution;

          (h) A default  under any bond,  debenture,  note or other  evidence of
     indebtedness  of either  Borrower owed to any Person other than the Lender,
     or under any indenture or other instrument under which any such evidence of
     indebtedness has been issued or by which it is governed, or under any lease
     of any of the  Premises,  and the  expiration of the  applicable  period of
     grace, if any, specified in such evidence of indebtedness, indenture, other
     instrument or lease;

          (i) Any Reportable  Event,  which the Lender  determines in good faith
     might  constitute  grounds  for  the  termination  of any  Plan  or for the
     appointment by the appropriate United States District Court of a trustee to
     administer  any Plan,  shall have  occurred and be continuing 30 days after
     written  notice to such effect shall have been given to either  Borrower by
     the Lender; or a trustee shall have been appointed by an appropriate United
     States  District  Court to  administer  any Plan;  or the  Pension  Benefit
     Guaranty  Corporation  shall have  instituted  proceedings to terminate any
     Plan or to appoint a trustee to  administer  any Plan;  or either  Borrower
     shall have filed for a distress  termination  of any Plan under Title IV of
     ERISA; or the Borrower shall have failed to make any quarterly contribution
     required  with  respect to any Plan under  Section  412(m) of the  Internal
     Revenue Code of 1986, as amended, which the Lender determines in good faith
     may by itself, or in combination with any such failures that the Lender may
     determine are likely to occur in the future,  result in the imposition of a
     lien on either Borrower's assets in favor of the Plan;

                                       33
<PAGE>


          (j) An event of default  shall  occur under any  Security  Document or
     under any other security agreement,  mortgage, deed of trust, assignment or
     other  instrument or agreement  securing any obligations of either Borrower
     hereunder or under any note;

          (k) Either Borrower shall  liquidate,  dissolve,  terminate or suspend
     its business  operations  or otherwise  fail to operate its business in the
     ordinary course,  or sell all or substantially  all of its assets,  without
     the Lender's prior written consent;

          (l) Either Borrower shall fail to pay, withhold,  collect or remit any
     tax or tax  deficiency  when assessed or due (other than any tax deficiency
     which is being  contested in good faith and by proper  proceedings  and for
     which it shall have set aside on its books adequate  reserves  therefor) or
     notice of any state or federal tax liens shall be filed or issued;

          (m) Default in the  payment of any amount  owed by either  Borrower to
     the Lender other than any indebtedness arising hereunder;

          (n) Any event or  circumstance  with respect to either  Borrower shall
     occur such that the Lender shall believe in good faith that the prospect of
     payment of all or any part of the  Obligations or the performance by either
     Borrower  under the Loan  Documents  is  impaired or any  material  adverse
     change in the business or financial condition of the Borrower shall occur.

          (o) Any breach,  default or event of default by or attributable to any
     Affiliate under any agreement between such Affiliate and the Lender.

     Section 8.2 Rights and Remedies.  During any Default Period, the Lender may
exercise any or all of the following rights and remedies:

          (a) the Lender may, by notice to the Borrowers, declare the Commitment
     to be terminated, whereupon the same shall forthwith terminate;

          (b)  the  Lender  may,  by  notice  to  the  Borrowers,   declare  the
     Obligations  to be forthwith  due and payable,  whereupon  all  Obligations
     shall become and be forthwith due and payable, without presentment,  notice
     of  dishonor,  protest  or  further  notice of any  kind,  all of which the
     Borrowers hereby expressly waives;

          (c) the  Lender  may,  without  notice to the  Borrowers  and  without
     further  action,  apply  any and all  money  owing by the  Lender to either
     Borrower to the payment of the Obligations of either Borrower;

          (d) the  Lender  may  exercise  and  enforce  any and all  rights  and
     remedies  available  upon  default  to  a  secured  party  under  the  UCC,
     including,  without limitation, the right to take possession of Collateral,
     or any evidence thereof, proceeding without judicial process or by judicial
     process  (without a prior  hearing or notice  thereof,  which each Borrower

                                       34
<PAGE>


     hereby expressly  waives) and the right to sell, lease or otherwise dispose
     of any  or  all  of the  Collateral,  and,  in  connection  therewith,  the
     Borrowers  will on demand  assemble the Collateral and make it available to
     the Lender at a place to be  designated  by the Lender which is  reasonably
     convenient to both parties;

          (e) the Lender may exercise and enforce its rights and remedies  under
     the Loan Documents; and

          (f) the Lender may exercise any other rights and remedies available to
     it by law or agreement.

Notwithstanding  the  foregoing,  upon the  occurrence  of an  Event of  Default
described in subsections (d) or (e) of Section 8.1, each Borrower's  Obligations
shall be immediately due and payable automatically without presentment,  demand,
protest or notice of any kind.

     Section 8.3 Certain  Notices.  If notice to either Borrower of any intended
disposition of Collateral or any other  intended  action is required by law in a
particular  instance,  such notice shall be deemed  commercially  reasonable  if
given (in the manner specified in Section 9.3) at least ten calendar days before
the date of intended disposition or other action.

                                   ARTICLE IX

                                  Miscellaneous
                                  -------------

     Section  9.1 No  Waiver;  Cumulative  Remedies.  No failure or delay by the
Lender in exercising any right,  power or remedy under the Loan Documents  shall
operate as a waiver  thereof;  nor shall any single or partial  exercise  of any
such right,  power or remedy preclude any other or further  exercise  thereof or
the exercise of any other right,  power or remedy under the Loan Documents.  The
remedies  provided in the Loan Documents are cumulative and not exclusive of any
remedies provided by law.

     Section 9.2  Amendments,  Etc. No amendment,  modification,  termination or
waiver of any  provision  of any Loan  Document or consent to any  departure  by
either  Borrower  therefrom  or any  release  of a  Security  Interest  shall be
effective unless the same shall be in writing and signed by the Lender, and then
such waiver or consent shall be effective only in the specific  instance and for
the specific  purpose for which given. No notice to or demand on either Borrower
in any case shall entitle the Borrowers to any other or further notice or demand
in similar or other circumstances.

     Section 9.3  Addresses  for Notices,  Etc.  Except as  otherwise  expressly
provided  herein,  all  notices,  requests,  demands  and  other  communications
provided  for  under the Loan  Documents  shall be in  writing  and shall be (a)
personally  delivered,  (b) sent by first class United States mail,  (c) sent by
overnight  courier of national  reputation,  or (d) transmitted by telecopy,  in
each case  addressed or telecopied to the party to whom notice is being given at
its address or telecopier number as set forth below:

                                       35
<PAGE>


                  If to the Borrowers:

                  Medical Dynamics, Inc.
                  99 Inverness Drive East
                  Englewood, CO  80111
                  Telecopier:  (303) 799-1378
                  Attention: Van A. Horsley

                  Computer Age Dentist, Inc.
                  99 Inverness Drive East
                  Englewood, CO  80111
                  Telecopier:  (303) 799-1378
                  Attention: Van A. Horsley

                  If to the Lender:

                  Norwest Business Credit, Inc.
                  1740 Broadway
                  Denver, CO  80274-8625
                  Telecopier: (303) 863-4904
                  Attention: Colette Taylor

or,  as to each  party,  at such  other  address  or  telecopier  number  as may
hereafter  be  designated  by such party in a written  notice to the other party
complying  as to  delivery  with the terms of this  Section.  All such  notices,
requests, demands and other communications shall be deemed to have been given on
(a) the date received if personally delivered, (b) when deposited in the mail if
delivered by mail,  (c) the date sent if sent by overnight  courier,  or (d) the
date of transmission  if delivered by telecopy,  except that notices or requests
to the  Lender  pursuant  to any of the  provisions  of  Article II shall not be
effective until received by the Lender.

     Section 9.4 Further Documents. The Borrowers will from time to time execute
and  deliver  or  endorse  any  and  all  instruments,  documents,  conveyances,
assignments,  security agreements, financing statements and other agreements and
writings  that the Lender may  reasonably  request in order to secure,  protect,
perfect or enforce the Security  Interest or the Lender's  rights under the Loan
Documents  (but any  failure to request or assure  that the  Borrowers  execute,
deliver  or  endorse  any such item  shall not  affect or impair  the  validity,
sufficiency or enforceability  of the Loan Documents and the Security  Interest,
regardless  of  whether  any such  item was or was not  executed,  delivered  or
endorsed in a similar context or on a prior occasion).

     Section 9.5  Collateral.  This  Agreement  does not  contemplate  a sale of
accounts,  contract  rights or chattel  paper,  and,  as  provided  by law,  the
Borrowers  are  entitled  to  any  surplus  and  shall  remain  liable  for  any
deficiency.  The  Lender's  duty of  care  with  respect  to  Collateral  in its
possession  (as  imposed  by law)  shall be  deemed  fulfilled  if it  exercises
reasonable  care  in  physically  keeping  such  Collateral,  or in the  case of

                                       36
<PAGE>


Collateral  in the  custody or  possession  of a bailee or other  third  person,
exercises  reasonable care in the selection of the bailee or other third person,
and the Lender  need not  otherwise  preserve,  protect,  insure or care for any
Collateral.  The  Lender  shall not be  obligated  to  preserve  any  rights the
Borrowers may have against prior parties, to realize on the Collateral at all or
in any  particular  manner  or  order  or to  apply  any  cash  proceeds  of the
Collateral in any particular order of application.

     Section 9.6 Costs and Expenses.  The Borrowers  jointly and severally agree
to  pay on  demand  all  costs  and  expenses,  including  (without  limitation)
attorneys' fees, incurred by the Lender in connection with the Obligations, this
Agreement,  the Loan  Documents,  and any other  document or  agreement  related
hereto or thereto, and the transactions  contemplated hereby,  including without
limitation  all such costs,  expenses and fees incurred in  connection  with the
negotiation,  preparation,  execution, amendment,  administration,  performance,
collection  and  enforcement  of the  Obligations  and all  such  documents  and
agreements and the creation, perfection, protection,  satisfaction,  foreclosure
or enforcement of the Security Interest.

     Section 9.7 Indemnity.  In addition to the payment of expenses  pursuant to
Section 9.7, the Borrowers jointly and severally agree to indemnify,  defend and
hold  harmless the Lender,  and any of its  participants,  parent  corporations,
subsidiary corporations,  affiliated corporations,  successor corporations,  and
all present and future officers, directors,  employees,  attorneys and agents of
the  foregoing  (the  "Indemnitees")  from  and  against  any of  the  following
(collectively, "Indemnified Liabilities"):

               (i) any and all transfer taxes, documentary taxes, assessments or
          charges made by any governmental  authority by reason of the execution
          and delivery of the Loan Documents or the making of the Advances;

               (ii) any claims,  loss or damage to which any  Indemnitee  may be
          subjected if any  representation or warranty contained in Section 5.12
          proves to be incorrect in any respect or as a result of any  violation
          of the covenant contained in Section 6.4(b); and

               (iii) any and all other liabilities,  losses, damages, penalties,
          judgments,  suits,  claims,  costs and  expenses of any kind or nature
          whatsoever  (including,  without  limitation,  the reasonable fees and
          disbursements  of counsel) in  connection  with the  foregoing and any
          other investigative,  administrative or judicial proceedings,  whether
          or not such Indemnitee shall be designated a party thereto,  which may
          be imposed on, incurred by or asserted against any such Indemnitee, in
          any  manner  related to or arising  out of or in  connection  with the
          making of the Advances  and the Loan  Documents or the use or intended
          use of the proceeds of the Advances.

If any investigative,  judicial or administrative proceeding arising from any of
the foregoing is brought against any Indemnitee, upon such Indemnitee's request,
the Borrowers,  or counsel  designated by the Borrowers and  satisfactory to the
Indemnitee, will resist and defend such action, suit or proceeding to the extent
and in the manner directed by the  Indemnitee,  at the Borrowers' sole costs and

                                       37
<PAGE>


expense.  Each  Indemnitee will use its best efforts to cooperate in the defense
of any  such  action,  suit  or  proceeding.  If the  foregoing  undertaking  to
indemnify,  defend and hold harmless may be held to be unenforceable  because it
violates any law or public policy,  the Borrowers  shall  nevertheless  make the
maximum  contribution to the payment and satisfaction of each of the Indemnified
Liabilities which is permissible under applicable law. The Borrowers' obligation
under this Section 9.7 shall survive the  termination  of this Agreement and the
discharge of the Borrowers' other obligations hereunder.

     Section 9.8 Participants.  The Lender and its participants, if any, are not
partners or joint  venturers,  and the Lender  shall not have any  liability  or
responsibility  for any obligation,  act or omission of any of its participants.
All rights and powers specifically  conferred upon the Lender may be transferred
or delegated to any of the Lender's participants, successors or assigns.

     Section  9.9  Execution  in  Counterparts.  This  Agreement  and other Loan
Documents may be executed in any number of  counterparts,  each of which when so
executed  and  delivered  shall be  deemed  to be an  original  and all of which
counterparts, taken together, shall constitute but one and the same instrument.

     Section 9.10 Binding Effect;  Assignment;  Complete  Agreement;  Exchanging
Information.  The Loan Documents  shall be binding upon and inure to the benefit
of the Borrowers  and the Lender and their  respective  successors  and assigns,
except  that  neither  Borrower  shall  have the  right  to  assign  its  rights
thereunder or any interest  therein without the Lender's prior written  consent.
This  Agreement,  together with the Loan  Documents,  comprises the complete and
integrated  agreement of the parties on the subject matter hereof and supersedes
all prior  agreements,  written or oral, on the subject matter  hereof.  Without
limiting the Lender's  right to share  information  regarding  the Borrowers and
their Affiliates with the Lender's participants,  accountants, lawyers and other
advisors,  the  Lender,  Norwest  Corporation,   and  all  direct  and  indirect
subsidiaries of Norwest  Corporation,  may exchange any and all information they
may have in their possession  regarding the Borrowers and their Affiliates,  and
each Borrower  waives any right of  confidentiality  it may have with respect to
such exchange of such information.

     Section 9.11  Severability  of Provisions.  Any provision of this Agreement
which is prohibited or unenforceable  shall be ineffective to the extent of such
prohibition or unenforceability  without  invalidating the remaining  provisions
hereof.

     Section 9.12 Headings.  Article and Section  headings in this Agreement are
included  herein for  convenience  of reference  only and shall not constitute a
part of this Agreement for any other purpose.

     Section 9.13. Governing Law; Jurisdiction, Venue; Waiver of Jury Trial. The
Loan  Documents  shall be  governed  by and  construed  in  accordance  with the
substantive  laws  (other than  conflict  laws) of the State of  Colorado.  This
Agreement  shall be governed by and construed in accordance with the substantive
laws (other than  conflict  laws) of the State of  Colorado.  Each party  hereto
hereby (i) consents to the personal jurisdiction of the state and federal courts

                                       38
<PAGE>


located in the State of Colorado in connection with any  controversy  related to
this  Agreement;  (ii) waives any  argument  that venue in any such forum is not
convenient,  (iii)  agrees that any  litigation  initiated  by the Lender or the
Borrower in connection  with this Agreement or the other Loan Documents shall be
venued in either the District Court of City and County of Denver,  Colorado,  or
the United States District Court,  District of Colorado;  and (iv) agrees that a
final  judgment in any such suit,  action or proceeding  shall be conclusive and
may be enforced in other  jurisdictions  by suit on the judgment or in any other
manner  provided  by law.  THE  PARTIES  WAIVE ANY RIGHT TO TRIAL BY JURY IN ANY
ACTION OR PROCEEDING BASED ON OR PERTAINING TO THIS AGREEMENT.

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

NORWEST BUSINESS CREDIT, INC.                   MEDICAL DYNAMICS, INC.


By _________________________________            By _____________________________
   Colette Taylor                                  Van A. Horsley
   Its Commercial Banking Officer                  Its President


                                                COMPUTER AGE DENTIST, INC.


                                                By _____________________________
                                                   Van A. Horsley
                                                   Its Vice-President


                                       39
<PAGE>



                         Table of Exhibits and Schedules

            Exhibit A-1           Form of MDI Note
            Exhibit A-2           Form of CAD Note
            Exhibit B             Compliance Certificate
            Exhibit C             Premises

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

            Schedule 5.1          Trade Names, Chief Executive Office, Principal
                                  Place of Business, and Locations of Collateral
            Schedule 5.4          Subsidiaries
            Schedule 7.1          Permitted Liens
            Schedule 7.2          Permitted Indebtedness and Guaranties


<PAGE>


                  Exhibit A-1 to Credit and Security Agreement

                                 REVOLVING NOTE

$1,000,000                                                      Denver, Colorado
                                                                 October 9, 1998


     For value received,  the undersigned,  MEDICAL  DYNAMICS,  INC., a Colorado
corporation  (the  "Borrower"),  hereby promises to pay on the Termination  Date
under the Credit  Agreement  (defined  below),  to the order of NORWEST BUSINESS
CREDIT,  INC., a Minnesota  corporation  (the  "Lender"),  at its main office in
Minneapolis,  Minnesota,  or at any other  place  designated  at any time by the
holder  hereof,  in  lawful  money  of  the  United  States  of  America  and in
immediately   available   funds,  the  principal  sum  of  One  Million  Dollars
($1,000,000)  or, if less, the aggregate unpaid principal amount of all Advances
made by the Lender to the Borrower under the Credit  Agreement  (defined  below)
together with interest on the principal amount  hereunder  remaining unpaid from
time to time,  computed on the basis of the actual  number of days elapsed and a
360-day  year,  from the date  hereof  until this Note is fully paid at the rate
from time to time in effect under the Credit and Security Agreement of even date
herewith (as the same may  hereafter be amended,  supplemented  or restated from
time to time, the "Credit  Agreement") by and among the Lender, the Borrower and
Computer Age Dentist,  Inc. The principal  hereof and interest  accruing thereon
shall be due and payable as provided in the Credit  Agreement.  This Note may be
prepaid only in accordance with the Credit Agreement.

     This Note is issued  pursuant,  and is  subject,  to the Credit  Agreement,
which provides,  among other things, for acceleration  hereof.  This Note is the
MDI Note referred to in the Credit Agreement.  This Note is secured, among other
things,  pursuant to the Credit Agreement and the Security  Documents as therein
defined,  and may now or  hereafter  be secured  by one or more  other  security
agreements,  mortgages,  deeds of trust,  assignments  or other  instruments  or
agreements.

     The  Borrower  hereby  agrees  to pay all  costs of  collection,  including
attorneys'  fees and legal expenses in the event this Note is not paid when due,
whether or not legal proceedings are commenced.

     Presentment or other demand for payment, notice of dishonor and protest are
expressly waived.
                        

                                          MEDICAL DYNAMICS, INC.

                                          By ___________________________________
                                             Van A. Horsley
                                             Its President


                                      A-1
<PAGE>


                  Exhibit A-2 to Credit and Security Agreement

                                 REVOLVING NOTE

$1,000,000                                                      Denver, Colorado
                                                                 October 9, 1998


     For value received,  the  undersigned,  COMPUTER AGE DENTIST,  a California
corporation  (the  "Borrower"),  hereby promises to pay on the Termination  Date
under the Credit  Agreement  (defined  below),  to the order of NORWEST BUSINESS
CREDIT,  INC., a Minnesota  corporation  (the  "Lender"),  at its main office in
Minneapolis,  Minnesota,  or at any other  place  designated  at any time by the
holder  hereof,  in  lawful  money  of  the  United  States  of  America  and in
immediately   available   funds,  the  principal  sum  of  One  Million  Dollars
($1,000,000)  or, if less, the aggregate unpaid principal amount of all Advances
made by the Lender to the Borrower under the Credit  Agreement  (defined  below)
together with interest on the principal amount  hereunder  remaining unpaid from
time to time,  computed on the basis of the actual  number of days elapsed and a
360-day  year,  from the date  hereof  until this Note is fully paid at the rate
from time to time in effect under the Credit and Security Agreement of even date
herewith (as the same may  hereafter be amended,  supplemented  or restated from
time to time,  the "Credit  Agreement") by and among the Lender and the Borrower
and Medical  Dynamics,  Inc. The principal hereof and interest  accruing thereon
shall be due and payable as provided in the Credit  Agreement.  This Note may be
prepaid only in accordance with the Credit Agreement.

     This Note is issued  pursuant,  and is  subject,  to the Credit  Agreement,
which provides,  among other things, for acceleration  hereof.  This Note is the
CAD Note referred to in the Credit Agreement.  This Note is secured, among other
things,  pursuant to the Credit Agreement and the Security  Documents as therein
defined,  and may now or  hereafter  be secured  by one or more  other  security
agreements,  mortgages,  deeds of trust,  assignments  or other  instruments  or
agreements.

     The  Borrower  hereby  agrees  to pay all  costs of  collection,  including
attorneys'  fees and legal expenses in the event this Note is not paid when due,
whether or not legal proceedings are commenced.

     Presentment or other demand for payment, notice of dishonor and protest are
expressly waived.
                   

                                            COMPUTER AGE DENTIST, INC.

                                            By _________________________________
                                               Van A. Horsley
                                               Its Vice-President



                                      A-2
<PAGE>


                   Exhibit B to Credit and Security Agreement

                             Compliance Certificate
                             ----------------------


To:   Colette Taylor
      Norwest Business Credit, Inc.

Date: __________________, 199___

Subject: Medical Dynamics, Inc. and Computer Age Dentist, Inc.
         Financial Statements

     In accordance with our Credit and Security Agreement dated as of October 9,
1998 (the "Credit Agreement"),  attached are the financial statements of Medical
Dynamics, Inc. and Computer Age Dentist, Inc. (collectively, the "Borrowers") as
of and for  ________________,  _____ (the "Reporting Date") and the year-to-date
period then ended (the "Current Financials"). All terms used in this certificate
have the meanings given in the Credit Agreement.

     I certify that the Current Financials have been prepared in accordance with
GAAP, subject to year-end audit  adjustments,  and fairly present the Borrowers'
financial condition and the results of its operations as of the date thereof.

     Events of Default. (Check one):
     ------------------

          [ ]  The  undersigned  does not have  knowledge of the occurrence of a
               Default or Event of Default under the Credit Agreement.

          [ ]  The  undersigned  has knowledge of the occurrence of a Default or
               Event of Default under the Credit  Agreement and attached  hereto
               is a statement of the facts with respect to thereto.

          [ ]  I hereby certify to the Lender as follows:

          [ ]  The Reporting Date does not mark the end of one of the Borrowers'
               fiscal quarters, hence I am completing only paragraph __ below.

          [ ]  The Reporting Date marks the end of one of the Borrowers'  fiscal
               quarters,  hence I am  completing  all  paragraphs  below  except
               paragraph __.

          [ ]  The Reporting Date marks the end of the  Borrowers'  fiscal year,
               hence I am completing all paragraphs below.


                                      B-1
<PAGE>



     Financial Covenants. I further hereby certify as follows:
     --------------------

          1.  Minimum  Book Net  Worth.  Pursuant  to  Section  6.12 the  Credit
     Agreement,  as of the Reporting  Date,  the  Borrowers'  Book Net Worth was
     $____________  which G satisfies G does not  satisfy the  requirement  that
     such amount be not less than  $_____________  on the Reporting  Date as set
     forth in table below:

                          Period                          Minimum Book Net Worth
                          ------                          ----------------------
       September 1, 1998 through November 30, 1998              $5,000,000
         December 1, 1998 through February 28, 1999             $4,650,000
             March 1, 1999 through May 30, 1999                 $4,300,000
     June 1, 1999 through June 30, 1999 and each month          $4,400,000
                        thereafter

          2. Minimum EBITDA.  Pursuant to Section 6.13 of the Credit  Agreement,
     the Borrower's EBITDA for the ________ period ending on the Reporting Date,
     was  $____________,  which G satisfies  G does not satisfy the  requirement
     that such amount be not less than $_____________  during such period as set
     forth in table below:

                      Period                                Minimum EBITDA
                      ------                                --------------

       Three months ended September 30, 1998                  $[850,000]
       Three months ended December 31, 1998                   $[150,000]
         Three months ended March 31, 1999                    $[100,000]
         Three months ended June 30, 1999                     $ 250,000
        Three months ended September 30, 1999
       and each calendar quarter thereafter                   $ 150,000

          3.  Capital  Expenditures.  Pursuant  to  Section  7.10 of the  Credit
     Agreement,  for the  year-to-date  period ending on the Reporting Date, the
     Borrowers  have expended or  contracted to expend during the  _____________
     year   ended    ______________,    199___,   for   Capital    Expenditures,
     $__________________ in the aggregate and at most $______________ in any one
     transaction, which G satisfies G does not satisfy the requirement that such
     expenditures  not exceed  $200,000 in the aggregate  during the  Borrowers'
     fiscal year 1999, and zero thereafter.

          4. Salaries.  As of the Reporting  Date, the Borrower G is G is not in
     compliance with Section 7.17 of the Credit Agreement concerning salaries.

     Attached  hereto are all relevant  facts in reasonable  detail to evidence,
and the  computations  of the  financial  covenants  referred  to  above.  These
computations were made in accordance with GAAP.


                                      B-2
<PAGE>



                                         MEDICAL DYNAMICS, INC.


                                         By:
                                            ------------------------------------
                                            Its Chief Financial Officer


                                         COMPUTER AGE DENTIST, INC.


                                         By:
                                           -------------------------------------
                                           Its Chief Financial Officer



                                      B-3
<PAGE>



                   Exhibit C to Credit and Security Agreement


                                    Premises
                                    --------

     The Premises  referred to in the Credit and Security  Agreement are legally
described as follows:

                             99 Inverness Drive East
                               Englewood, CO 80111



                                      C-1
<PAGE>


                  Schedule 5.1 to Credit and Security Agreement

       Trade Names, Chief Executive Office, Principal Place of Business,
                           and Locations of Collateral

                                   Trade Names
                                   -----------

                                      None

               Chief Executive Office/Principal Place of Business
               --------------------------------------------------

                             99 Inverness Drive East
                               Englewood, CO 80111

                     Other Inventory and Equipment Locations
                     ---------------------------------------

                        11300 W. Olympic Blvd., Suite 600
                             Los Angeles, California

                               30903 West Ten Mile
                           Farmington Hills, Michigan

                         1555 Williams Drive, Suite 110
                             Marietta, Georgia 30062



                                      S-1
<PAGE>



                  Schedule 5.4 to Credit and Security Agreement

                                  Subsidiaries
                                  ------------

                                       MDI
                                       ---

                                       CAD
                             MedPacific Corporation

                                       CAD
                                       ---

                                      None





                                      S-2
<PAGE>


                  Schedule 7.1 to Credit and Security Agreement

                                 Permitted Liens
                                 ---------------

Borrower   Creditor       Collateral    Jurisdiction    Filing Date   Filing No.
- --------   --------       ----------    ------------    -----------   ----------
CAD        Affiliated     Certain       California      6/16/98       9817060032
           Capital Corp.  equipment     SOS




                                      S-3
<PAGE>
<TABLE>
<CAPTION>

                             Schedule 7.2 to Credit and Security Agreement


                                  Permitted Indebtedness and Guaranties
                                  -------------------------------------
                                           Other Indebtedness
                                           ------------------
Debtor           Creditor           Principal Amount    Maturity Date    Monthly Payment      Collateral
- ------           --------           ----------------    -------------    ---------------      ----------
<S>             <C>                 <C>                 <C>              <C>                  <C>                            
  MDI            ADG Inc.               $231,250          04/01/03          See Note             None
  MDI           Marcotte's              $268,750          04/01/03          See Note             None
  MDI         Marcotte's Rent            $40,600          04/01/99          See Note             None
  MDI          Dan Richmond             $150,000          10/23/98            None               None
  MDI            Chae Kim               $150,000          10/23/98            None               None
  MDI           Jim DeVicco             $100,000          10/23/98            None               None
  MDI             USBank             $50,000 Letter        Demand             None          Certificate of
                                       of Credit                                                Deposit
  CAD    Affiliated Capital Corp.      $82,248.24         06/27/00          $4,797.46            None
  CAD     Wells Fargo Bank, N.A.    $50,000 Line of        Demand         2% of monthly          None
                                         Credit                           outstandings

</TABLE>
<TABLE>
<CAPTION>


                                      Convertible Indebtedness
                                      ------------------------
Debtor            Creditor          Principal Amount   Maturity Date   Monthly Payment    Collateral
- ------            --------          ----------------   -------------   ---------------    ----------
<S>               <C>               <C>                <C>             <C>                <C>                   
  MDI     The Tail Wind Fund, Ltd.       $550,000         10/31/00          None             None
  MDI     The Tail Wind Fund, Ltd.     $1,100,000         07/31/03          None             None

                                       Guaranties
                                       ----------

      Primary Obligor       Amount and Description of    Beneficiary of Guaranty
      ---------------       -------------------------    -----------------------
                              Obligation Guaranteed
                              ---------------------

                                      None


                                      S-4
</TABLE>



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