black box

/B L AE1 K B AA1 K S/

noun

1
The brightly colored cockpit voice recorders and flight data recorders in an aircraft designed to aid in determining the cause of an accident.
2
(by extension) Any similar device on motor vehicles, such as rail event recorders and ship trip recorders.
3
A theoretical construct or device with known input and output characteristics but unknown method of operation.
4
A device used in phreaking that prevents the calling party from being billed for the call placed.

verb

1
To focus on the inputs and outputs without worrying about the internal complexity.

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