APM Full Form

Full Form of APM: Advanced Power Management

APM Full Form is Advanced Power Management. Advanced Power Management is an application programming interface developed jointly by Microsoft and Intel to achieve power management. Basically, it allows an OS (operating system) running an IBM-compatible PC (personal computer) to interact with (or) work with any basic input/output system (BIOS) to achieve this power management. The APM is designed to control the power use of the system. Until the system goes to sleep state.

Approach used by advanced power management: APM Full Form

There is layered approach which is used to manage the device.  The application includes a device driver that talks to an operating system-specific APM driver. The APM-aware BIOS controls the hardware. The controller communicates with this aware BIOS and power management is sent to the APM controller from Bios. The controller sends information by calling the function. The APM controller acts as an intermediary between the BIOS and the operating system.

Power control states: Full Form of APM

Two power control states include; (1) Based on device activity, APM BIOS manages power in the background. From OEM, it provides APM BIOS and is hardware platform specific. (2) By calling a function to the APM software interface, the APM controller manages power.


There are 5 system power states-

States are created based on the latency required for the system to power up to an operational state.


Fully On – Higher power consumption in this state. No power management is performed in this state.

APM Enabled – No power management is performed on some unused devices, but the system is operating in this state.

APM Standby – The system is idle for a short period and enters this state.

APM Suspend: Inactive for an extended period and the system enters this state. It takes too long to go to enable state from sleep state.

Off – CPU clock stops in this state.

Popular Full Form of APM:

Full Form of APM                                                                         Field of Application

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