debugging

Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program or a piece of electronic hardware thus making it behave as expected. Debugging tends to be harder when various subsystems are tightly coupled, as changes in one may cause bugs to emerge in another.

There is some controversy over the origin of the term "debugging." The terms "bug" and "debugging" are both popularly attributed to Admiral Grace Hopper in the 1940s,[1] but the term "bug" dates back at least to 1878 and Thomas Edison (see the Software bug article for a full discussion), and "debugging" seems to have been used as a term in aeronautics before entering the world of computers.

Source: Wikipedia (http://en.wikipedia.org/wiki/Debugging)

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