# ENDORSEMENT #0020

THIS ENDORSEMENT, EFFECTIVE 12:01 A.M. 05/21/91 FORMS A PART OF POLICY NO. 308-31-33 ISSUED TO INTERNATIONAL BUSINESS MACHINES CORP. BY NATIONAL UNION FIRE INSURANCE COMPANY OF PITTSBURGH, PA.

IN CONSIDERATION OF THE PREMIUM PAID IT IS HEREBY UNDERSTOOD AND AGREED THAT THE FOLLOWING ARE NAMED AS ADDITIONAL INSURED AS RESPECTS ALL THE NAMED INSURED'S OPERATIONS AT 900 KING STREET, RYE BROOK, NEW YORK:

ATRIUM ASSOCIATES CONNECTICUT GENERAL INSURANCE COMPANY

K. Gregori
AUTHORIZED REPRESENTATIVE

INSURED'S COPY