Year 2000 computing crisis : Defense has made progress, but additional management controls are needed : statement of Jack L. Brock, Jr., Director, Governmentwide and Defense Information Systems, Accounting and Information Management Division, before the Subcommittee on Government Management, Information and Technology, Committee on Government Reform, and the Subcommittee on Technology, Committee on Science, House of Representatives / - Brock, Jack L. (The Office, 1999)