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black box

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson 0.07 sec.

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.

(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.
The Beasts of Tarzan by Burroughs, Edgar Rice View in context
Karnegie (who had cast the eye of a landlord on the black box in the passage) announced that one "Mrs.
Man And Wife by Collins, Wilkie View in context
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.
The Malefactor by Oppenheim, E. Phillips View in context
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