n. A feature that enables a computer or similar device to be ready for use as soon as it is turned on.
1999
Then [Microsoft], based in Redmond, Wash., plans "sometime in 2000" to release a new consumer version of Windows that will offer an as-yet-unannounced set of easy-to-use consumer features, such as "instant on."
1999
But why are experts so bullish about a Windows-CE hegemony? First, it is not a hefty OS. It is simple to use-with one hand operation, instant on/off interfaces and the familiar Windows icons.
1979 (earliest)
The companies were helped along by manufacturers of consumer appliances. Homes of the '60s and '70s filled up with hair dryers, coffee makers, microwave ovens, instant-on TVs…