Department of the Treasury, Internal Revenue Service, 6009 Oxon Hill Road, Suite 700, ATTN: M:P, Oxon Hill, MD 20745

U -- UMBRELLA CONTRACTS FOR TRAINING AND PERFORMANCE DEVELOPMENT POC Steven G. VanderLinden, (202) 283-1379 CNT TIRNO-98-D-00016 AMT $26,395,837 LINE Service Area 3 DTD 040198 TO ManTech Systems Engineering Corporation, 12015 Lee Jackson Highway, Fairfax, VA 22033-3300 WEB: Umbrella Training Contracts, http://www.procurement.irs.gov (after 040198). (0086)

Loren Data Corp. http://www.ld.com (SYN# 0391 19980331\U-0008.AWD)