A theoretical construct or device with known input and output characteristics but unknown method of operation.
A flight recorder; the brightly colored cockpit voice recorders and flight data recorders in an aircraft designed to aid in determining the cause of an accident.
A device used in phreaking that prevents the calling party from being billed for the call placed.
A type of theater characterized by a lack of decoration or complex mechanisms.
Any similar device on motor vehicles, such as rail event recorders and ship trip recorders.
To focus on the inputs and outputs without worrying about the internal complexity.
A tool, implement used for manipulation or measurement.
A legal document, such as a contract, deed, trust, mortgage, power, indenture, or will.
A device used to produce music.
A means or agency for achieving an effect.
A person used as a mere tool for achieving a goal.
A measuring or displaying device.
To devise, conceive, cook up, plan.
To perform upon an instrument; to prepare for an instrument.
To apply measuring devices.