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software bug
(redirected from Computer bug)

    Also found in: Wikipedia 0.04 sec.

A problem that causes a program to produce invalid output or to crash (lock up). The problem is either insufficient logic or erroneous logic. For example, a program can crash if there are not enough validity checks performed on the input or on the calculations themselves, and the computer attempts to divide by zero. Bad instruction logic misdirects the computer to a place in the program where an instruction does not exist, and it crashes.

A program with bad logic may produce bad output without crashing, which is the reason extensive testing is required. For example, if the program is supposed to add an amount, but subtracts it instead, bad output results, although the computer keeps running. See abend, bug and buggy.
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Overblown Y2K threat: During the months leading up to the year 2000, many of the financial newsletter writers, and even some voices in the major media, claimed against evidence and reason that the Y2K computer bug was an unsolvable problem and that the consequences on January 1st would be catastrophic.
Projecting the lines: JBS founder Robert Welch was adept at ... by McManus, John F. / The New American
A year ago, lest we forget, we were enthralled and terrified of this computer bug that none of us understood, and yet so convinced were we that the world as we knew it was in grave peril, that the Canadian Mint printed extra money and bottled water sold out to people afraid that computer malfunctions would make the taps run dry.
Reflections at the end of a most tumultuous year by Carriere, Vianney / Anglican Journal
Only a computer bug wasn't to blame and it wasn't really the fault of the rain.
EDITORIAL THE Y2K BUST by Daily News (Los Angeles, CA)
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