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.
Synonym of tool, implement, device, gadget, part
A placeholder name for an unnamed, unspecified, or hypothetical manufactured good or product, typically as an example for purposes of explaining concepts.
A floating device inside a beer can, meant to create foam when opened.
A small scraping tool consisting of a blade and a handle, commonly used to remove paint from glass and other smooth surfaces.
Any one of the components of a computer application's graphical user interface, such as a Cancel button or text input box that a user interacts with.
A small applet that can be placed on the desktop or in a sidebar, etc.