Supplement to ACATR EDS20001201RSC03

October 25, 2001

Rational Software Corporation (the client) hereby requests that the Ada Conformity Assessment Authority (ACAA) extend the certified status documented in the above-referenced Ada Conformity Assessment Test Report (ACATR) and in Ada Conformity Assessment Certificate (ACAC) A010516E2.4-003 to the implementation class(es) described in the following pages.

Technical Contact:

David J. Lofgren
Rational Software Corporation
18880 Homestead Road
Cupertino, CA 95014

Approval: ______________________________    ________________
                     Ada Conformity Assessment Authority     Date


Implementation Class Information


Implementation Class Category:  Base

Processor Identification:  Rational Apex Ada 95/83, Compaq Alpha Tru64, version 4.0.0c

Host Systems:  Compaq (Digital) AlphaStation under Tru64 4.0D through 4.0G or Tru64 5.1

Target Systems:  Same as host

Representative Processor and Configuration Tested:

Host System:  Compaq (Digital) Personal Workstation 433au under Tru64 4.0D

Target System:  Same as host

ACATS Version Used for Testing Representative Processor:ACATS 2.4 (VCS label A2_4B)


_________________________   ________________
David J. Lofgren                  Date
Rational Software Corporation