**ENDORSEMENT #13**

In consideration of the premium charged, it is hereby understood and agreed that the following Joint Ventures are added as additional Named Insureds (as respects I.B.M.'s interest only):

1. Market Street Associates of St. Louis
2. Discovision Associates
3. Satellite Business Systems

This endorsement to take effect on the 29th day of January, 1980. All other items and conditions remain unchanged.

Attached to and forming part of Policy No. 927856 of FIRST STATE INSURANCE COMPANY.

Issued to: INTERNATIONAL BUSINESS MACHINES, INC., ETAL
7-22-80 bh

The company located these documents in its business records. At this time, the company does not certify that these documents constitute a complete and accurate copy of the policy.