black box
  • A component, device, or unit with an input and an output, which can be inserted into a system without the need to know its internal structure. It is simply used based on its input and output characteristics. Also called closed box (1).
  • In computers, a hardware or software unit whose internal structure is unknown, but whose function is known. Also called closed box (2).
  • A sturdy self-contained electronic device which records key information concerning an aircraft, such as flight data.

Not what you were looking for?