The Year 2000 problem (also known as the Y2K problem, the millennium bug, the Y2K bug, or simply Y2K) was a notable computer bug resulting from the practice in early computer program design of representing the year with two digits.

This caused some date-related processing to operate incorrectly for dates and times on and after January 1, 2000 and on other critical dates which were billed “event horizons”.

Without corrective action, long-working systems would break down when the “…97, 98, 99…” ascending numbering assumption suddenly became invalid. Companies and organizations world-wide checked, fixed, and upgraded their computer systems.

The following are documents pertaining to this topic.

Declassified Documents

blankAll documents to the year 2000 crisis from the NSA – This request yielded an $8,000 charge for documents relating to Y2K.

blank DOD/IG Audit Report, Year 2000 Issues Within the U.S. Pacific Command’s Area of Responsibility, Host Nation Support to U.S. Forces in Japan, October 28, 1999 [41 Pages, 6.5MB]

blank DOD/IG Audit Report, DOD Base Communications Systems Compliance with Year 2000 Requirements, October 30, 1998 [27 Pages, 2.1MB]

blankReport of the Defense Science Board Task Force on Year 2000, April 1998 [72 Pages, 1.5MB]

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