Bugs
Errors
in computer programs are called "bugs".
They may be benign and not affect the usefulness of the program, or have only
subtle effects. But in some cases, they may cause the program or the entire
system to "hang",
becoming unresponsive to input such as mouse clicks or keystrokes, to completely fail, or to crash. Otherwise benign bugs may sometimes be harnessed for
malicious intent by an unscrupulous user writing an exploit, code designed to take advantage of a bug and disrupt a
computer's proper execution. Bugs are usually not the fault of the computer.
Since computers merely execute the instructions they are given, bugs are nearly
always the result of programmer error or an oversight made in the program's
design.
Admiral Grace Hopper, an American
computer scientist and developer of the first compiler, is credited for
having first used the term "bugs" in computing after a dead moth was
found shorting a relay in the Harvard Mark II computer
in September 1947.
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