This date overflowed the 12-bit field that had been used in TOPS-10. There were numerous problems and crashes related to this bug while an alternative format was developed.

TOPS-10

Operating system for DEC PDP-10

TOPS-10 System is a discontinued operating system from Digital Equipment Corporation (DEC) for the PDP-10 mainframe computer family. Launched in 1967, TOPS-10 evolved from the earlier "Monitor" software for the PDP-6 and PDP-10 computers; this was renamed to TOPS-10 in 1970.

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January 4

Day of the year

January 4 is the fourth day of the year in the Gregorian calendar; 361 days remain until the end of the year.

Source: Wikipedia (CC BY-SA)

This date overflowed the 12-bit field that had been used in TOPS-10. There were numerous problems and crashes related to this bug while an alternative format was developed.

TOPS-10

January 4

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This date overflowed the 12-bit field that had been used in TOPS-10. There were numerous problems and crashes related to this bug while an alternative format was developed.

Related Wikipedia articles

TOPS-10

January 4