In science and engineering, a black box is a device, system or object which can be viewed solely in terms of its input, output and transfer characteristics without any knowledge of its internal workings, that is, its implementation is "opaque" (black). Almost anything might be referred to as a black box: a transistor, an algorithm, or the human mind.
The opposite of a black box is a system where the inner components or logic are available for inspection, which is sometimes known as a clear box, a glass box, or a white box.
Famous quotes containing the words black and/or box:
“The liberal wing of the feminist movement may have improved the lives of its middle- and upper-class constituency—indeed, 1992 was the Year of the White Middle Class Woman—but since the leadership of this faction of the feminist movement has singled out black men as the meta-enemy of women, these women represent one of the most serious threats to black male well-being since the Klan.”
—Ishmael Reed (b. 1938)
“We are little airy creatures,
All of different voice and features:
One of us in glass is set,
One of us you’ll find in jet,
T’other you may see in tin,
And the fourth a box within;
If the fifth you should pursue,
It can never fly from you.”
—Jonathan Swift (1667–1745)