EXHIBIT 10.22

                            SECOND ADDENDUM TO LEASE



This Second Addendum To Lease is made and entered into the 17th day of November,
1995,  between Conifer Prince Street Associates  (Landlord) and DSMI Corporation
(Tenant).

WITNESSETH: that Tenant currently leases and occupies approximately 5,504 square
feet of office space at 46 Prince Street,  Rochester, New York 14607 pursuant to
a Lease  Agreement  and First  Addendum To Lease,  dated  February  22, 1995 and
August 18, 1995, respectively.

WHEREAS, Tenant and Landlord desire to expand Tenant's Lease Premises to include
approximately  1,720 square feet of office  space  located on the lower level of
the Building as illustrated by Exhibit A-2 attached hereto and made part of this
Second Addendum To Lease.

NOW,  THEREFORE,  it is mutually  agreed  upon by Landlord  and Tenant to modify
certain provisions of the Lease as follows:

1.       Effective  upon full  execution  of this Second  Addendum To Lease, 
 Tenant's  lease  premises  shall be  approximately  7,224 rentable square feet.

2.       Effective  December 1, 1995,  Tenant  agrees to pay, in addition to its
         Base  Rent as  stated in the First  Addendum  To Lease,  the  following
         monthly Base Rent:

                       Period                        $/Sq.ft.          Monthly 
                  ---------------                    --------          --------
                  Month-to-Month                                      Base Rent
                  --------------                                      ---------
                  12/1/95-2/28/96                    $12.50            $1,096.88
                  3/1/96-2/28/97                      $13.00           $1,140.75
                  3/1/97-2/28/98                      $13.50           $1,184.63
                  3/1/98-2/28/99                      $14.00           $1,228.50
                  3/1/99-9/30/99                      $14.50           $1,272.38

4.       Landlord  or Tenant may  terminate  this  Second  Addendum  To Lease by
         providing the other with thirty (30) days prior  written  notice of its
         desire to terminate the provisions of this Second Addendum To Lease.

5.       Effective  upon  full  execution  of this  Second  Addendum  To  Lease,
         Schedule A-2 of the Lease  Agreement shall be replaced by Schedule A-3,
         attached and made a part of this Second Addendum To Lease.

Except as modified above,  all other terms and conditions of the Lease Agreement
and First  Addendum  To Lease,  dated  February  22,  1995 and August 18,  1995,
respectively, shall remain unchanged and in full force and effect.

Agreed to by:                                                   Agreed to by:
DSMI CORPORATION                               CONIFER PRINCE STREET ASSOCIATES


By:  /s/ Donald A. Carlberg             By:  /s/ Thomas L. Fountain 
                                        Agent for Owner 

Date:  November 17, 1995                Date:  November 17, 1995              
       
<PAGE>




                                  SCHEDULE A-3

                             COMMON AREA MAINTENANCE

                                 ADDITIONAL RENT

                                    UTILITIES


Total Square Footage of Building            30,375

Square Footage Covered by Lease              7,224

Tenant's Share Electric                     23.78%


                                                        ADDITIONAL RENT

Heating and Air Conditioning

The heat pump units serving the leased premises shall be individually gauged and
the monthly charges shall be calculated as set forth on the attached and further
explained as follows:

1. The heat pump units serving the lease  premises  shall be identified by model
number.

2. The actual heat pump operating  hours will be recorded for each month (column
3) and  multiplied  by the energy use factor  (column 4)  applicable to the heat
pump model to establish the total energy units (column 5).

3. The  total  energy  units  for all  heat  pumps  is then  added to the  total
auxiliary  usage to establish  the grand total usage and energy cost (total KWH)
for the building.

4. The grand total usage and energy cost is multiplied by the utility  company's
rate per KWH to establish the total cost for kilowatt hours.

5. The total  KWH are  divided  by the total  heat  pump  usage and  charges  to
establish the heat pump hourly rate (column 6).

6. The monthly  tenant  charge is the heat pump hourly  rate  multiplied  by the
total energy units (column 5).

7. Tenant will also pay 23.78% of general usage/common area electric.


<PAGE>


                                 ADDITIONAL RENT

                      Real Estate and Insurance Escalation

In  addition  to the  rents  set  forth in the  Lease,  and  heretofore  in this
Schedule, with 1995 as the base year, Tenant shall pay 23.78% of the increase in
real  estate  taxes and other  government  levies in lieu of taxes  (payable  in
October of the  following  year),  and 23.78% of the  increase in  property  and
liability insurance premiums (payable in February of the following year).