DATA NATIONAL CORPORATION

                           FORM 10-QSB

                        December 31, 1996




  (a)    Exhibits:

     10.1      Revolving Note
     10.2      Credit and Security Agreement
     10.3      Collateral Account Agreement
     10.4      Agreement as to Lockbox Service
     10.5      Landlord's Disclaimer and Consent
     10.6      Support Agreement - Richard S. Simms
     10.7      Support Agreement - Donald V. Warriner
     10.8      Guaranty by Corporation
     10.9      Security Agreement for Guaranty
     10.10     Security Agreement in  Favor of Norwest Bank NA
     10.11     Subordination Agreement
     10.12     Assignment
























                             REVOLVING NOTE

$500,000                                                      Denver, Colorado
                                                               January 3, 1997

     For value received, the undersigned, Service Business Systems, Inc., a 
Colorado corporation (the "Borrower"), hereby promises to pay on December 31,
1998 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 Five Hundred Thousand and No/100 Dollars ($500,000) or, if less, the 
aggregate unpaid principal amount of all advances made by the Lender to the 
Borrower hereunder, 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 (the "Credit Agreement") by and 
between the Lender and the Borrower.  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 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.

                                       SERVICE BUSINESS SYSTEMS, INC.


BY (Signature)                         /s/Donald V. Warriner
(Name and Title)                       Donald V. Warriner, 
                                       President and CEO