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The power key, or power button, is a key found on many computer keyboards during the 1980s and into the early 2000s. They were introduced on the first Apple Desktop Bus keyboards in the 1980s and have been a standard feature of many Macintosh keyboards since then.
Sleep on macOS consists of the traditional sleep, Safe Sleep, and Power Nap. In System Preferences , Safe Sleep [ 8 ] is referred to as sleep. Since Safe Sleep also allowed state to be restored in an event of a power outage , unlike other operating systems, hibernate was never offered as an option.
IEC 60417-5007, [6] the power-on symbol (line), appearing on a button or one end of a toggle switch indicates that the control places the equipment into a fully powered state. (1 or | means on.) IEC 60417-5008, [7] the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. (0 or ...
Obviously, the state that uses the least amount of power is a full shutdown, followed closely by “hibernate”—and trailed significantly by “sleep,” which uses the most power.
powercfg (executable name powercfg.exe) is a command-line utility that is used from an elevated Windows Command Prompt to control all configurable power system settings, including hardware-specific configurations that are not configurable through the Control Panel, on a per-user basis.
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.
Power management arguments are discussed in greater detail below. When invoking the command, only specified arguments modify power management options. Any arguments already set will be unmodified by pmset unless those arguments are specifically included. The utility can schedule wake, sleep, power on or power off events.
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