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black box

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson 0.06 sec.

black box

A custom-made electronic device, such as a protocol converter or encryption system. Yesterday's black boxes often become today's off-the-shelf products. See Black Box Corporation.

The Black Box
A black box does not have to look like a box. It can be any contraption that is custom made for an application.


black box
1. a self-contained unit in an electronic or computer system whose circuitry need not be known to understand its function
2. an informal name for flight recorder

black box [′blak ‚bäks]
(engineering)
Any component, usually electronic and having known input and output, that can be readily inserted into or removed from a specific place in a larger system without knowledge of the component's detailed internal structure.

(jargon)black box - An abstraction of a device or system in which only its externally visible behaviour is considered and not its implementation or "inner workings".

See also functional testing.


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And presently as he thought there recurred to his memory the little black box which lay hidden in a secret receptacle beneath a false top upon the table where his hand rested.
Karnegie (who had cast the eye of a landlord on the black box in the passage) announced that one "Mrs.
And all the time, I sat within a few feet of Wingrave, and I knew that in the black box before him were burning love letters from this woman, to the man whose code of honor would ever have protected her husband from disgrace; and I knew that I was listening to the thing which you, Aynesworth, and many of your fellow story writers, have so wisely and so ignorantly dilated upon--the vengeance of a woman denied.
 
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