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APM ABCs

Power Management is a way for the computer to save power by  turning off certain features of the computer such as the monitor, hard disk drives and other computer peripherals.

APM, or Advanced Power Management, is an Application Program Interface, or API, developed by Microsoft and Intel which allows computer and BIOS manufacturers to include Power Management into their BIOSes.

In the near future, ACPI, or Advanced Configuration and Power Interface, developed by Microsoft, Intel and Toshiba will be used which will essentially allow computers equipped with future operating systems and capable hardware to shutdown the computer temporarily. When the computer is turned back on or a button is pressed, the computer will immediately come on within a few seconds.

Unix (Certain variants such as Linux)
Windows 95
Windows 98
Windows 2000