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Power-on self-test. A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [1] POST processes may set the initial state of the device from firmware and detect if any hardware components are non-functional.
Alt + Space then S [notes 10] then Arrow Keys and ↵ Enter (to save new size) Alt + F3 then S then Arrow Keys. Alt + F8 then Arrow Keys / Alt +Right Mouse Button [notes 11] Ctrl + x, then ^ vertically. Alt +] (snap window to right half of screen), Alt + [ (snap window to left half of screen) Keep window always on top.
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. They are also found on an increasing number of Microsoft Windows keyboards ...
For another example, the BIOS keyboard interface interprets many keystrokes and key combinations to keep track of the various shift states (left and right Shift, Ctrl, and Alt), to call the print-screen service when Shift+PrtScrn is pressed, to reboot the system when Ctrl+Alt+Del is pressed, to keep track of the lock states (Caps Lock, Num Lock ...
Typing on a laptop keyboard. A computer keyboard is a peripheral input device modeled after the typewriter keyboard [1][2] which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter -style keyboards have been the main input ...
Booting. A flow diagram of a computer booting. In computing, booting is the process of starting a computer as initiated via hardware such as a button on the computer or by a software command. After it is switched on, a computer's central processing unit (CPU) has no software in its main memory, so some process must load software into memory ...
In computing, a keyboard controller is a device that interfaces a keyboard to a computer. Its main function is to inform the computer when a key is pressed or released. When data from the keyboard arrives, the controller raises an interrupt (a keyboard interrupt) to allow the CPU to handle the input. If a keyboard is a separate peripheral ...
Many computers, especially older models, have user accessible "reset" buttons that assert the reset line to facilitate a system reboot in a way that cannot be trapped (i.e. prevented) by the operating system. Out-of-band management also frequently provides the possibility to reset the remote system in this way.