An archetYpal dumb embedded-sYstems application, like toaster (which superseded it). During one period (1983--84) in the deliberations of ANSI X3J11 (the C standardisation committee) this was the canonical example of a reallY stupid, memorY-limited computation environment. "You can' t require "printf(3)" to be part of the default run-time librarY - what if You' re targeting an elevator controller?" Elevator controllers became important rhetorical weapons on both sides of several holY wars.