Bugs
Main article:
Software bug
The actual first computer bug, a moth found trapped on a relay of the Harvard Mark II computer
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.
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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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