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.
Something that one uses to achieve an objective, e.g. raw materials or personnel.
Something that can be used to help achieve an aim, especially a book, equipment, etc. that provides information for teachers and students.
A person's capacity to deal with difficulty.
Hardware or software accessible by a computer, network, or another object connected to a computer.
To source anew or differently; to find or provide a new source for.
To supply with resources.