V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ACPI
       Advanced Configuration and Power Interface (Intel, MS, Toshiba,
ACPI, OSPM, BIOS)


The Free On-line Dictionary of Computing (30 December 2018):

Advanced Configuration and Power Interface
ACPI

    (ACPI) An open industry standard
   developed by Intel, Microsoft, and Toshiba for
   configuration and power management.

   The key element of the standard is power management with two
   important improvements.  First, it puts the OS in control of
   power management.  In the currently existing APM model most
   of the power management tasks are run by the BIOS, with
   limited intervention from the OS.  In ACPI, the BIOS is
   responsible for the dirty details of communicating with
   hardware equipment but the control is in the OS.

   The other important feature is bringing power management
   features now available only in portable computers to
   desktop computers and servers.  Extremely low consumption
   states, i.e., in which only memory, or not even memory is
   powered, but from which ordinary interrupts (real time clock,
   keyboard, modem, etc.) can quickly wake the system, are today
   available in portables only.  The standard should make these
   available for a wider range of systems.

   For ACPI to work the operating system, the motherboard
   chipset, and for some functions even the CPU has to be
   designed for it.  Microsoft is heavily driving a move toward
   ACPI, both Windows NT 5.0 and Windows 98 will support it.
   It remains to be seen how much hardware manufacturers will
   embrace the technology and whether other operating system
   vendors will support it.

   ACPI Information Page (http://teleport.com/~acpi/).

   (1998-03-27)