Search results
Results From The WOW.Com Content Network
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.
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 method for computers since ...
The technology of computer keyboards includes many elements. Many different keyboard technologies have been developed for consumer demands and optimized for industrial applications. The standard full-size (100%) computer alphanumeric keyboard typically uses 101 to 105 keys; keyboards integrated in laptop computers are typically less comprehensive.
The keyboard for IBM PC-compatible computers is standardized. However, during the more than 30 years of PC architecture being frequently updated, many keyboard layout variations have been developed. A well-known class of IBM PC keyboards is the Model M. Introduced in 1984 and manufactured by IBM, Lexmark, Maxi-Switch and Unicomp, the vast ...
Device Manager is a component of the Microsoft Windows operating system. It allows users to view and control the hardware attached to the computer. When a piece of hardware is not working, the offending hardware is highlighted for the user to deal with. The list of hardware can be sorted by various criteria.
USB hardware. Various legacy USB connectors along a centimeter ruler for scale. Micro-B plug. Proprietary UC-E6 connector used on many older Japanese cameras for both USB and analog AV output. Mini-B plug. Standard-A receptacle (non-compliant because USB does not allow extension cables [1]) Standard-A plug. Standard-B plug. The initial versions ...
A typical 105-key computer keyboard, consisting of sections with different types of keys. A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, [1] navigation keys for moving the text cursor on the screen, function keys and system command keys—such as Esc and Break—for special actions, and often a numeric keypad ...
External keyboard light, replaced by internal backlight; is an LED light located at the top of the LCD screen which illuminates the keyboard from above. Power Bridge Some E, L, T, X, W (only W550s), and P (only P##s) series ThinkPads feature (for some 2013-2018 models) — internal secondary battery (as succession of secondary UltraBay battery ...