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The standard full-size (100%) computer alphanumeric keyboard typically uses 101 to 105 keys; keyboards integrated in laptop computers are typically less comprehensive. Virtual keyboards , which are mostly accessed via a touchscreen interface, have no physical switches and provide artificial audio and haptic feedback instead.
The common QWERTY keyboard layout is credited to the mechanical typewriter designed by C. Latham Sholes and patented in 1878; [2] research indicates the layout may have been influenced by telegraph operators. [3]
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 ...
The most common variant is the IBM Enhanced Keyboard identified by IBM assembly part number 1391401, the U.S. English layout keyboard bundled with the IBM Personal System/2. Until around 1993, most Model Ms included a coiled, detachable cable, with either an AT (pre-1987) or PS/2 connector , in 5- and 10-foot lengths (1.5 and 3 meters).
Membrane keyboard as used on the East German Robotron Z1013. A membrane keyboard is a computer keyboard whose keys are not separate, moving parts, as with the majority of other keyboards, but rather are pressure pads that have only outlines and symbols printed on a flat, flexible surface. Very little tactile feedback is felt when using such a ...
Variant 2 of the Brazilian keyboard, the only which gained general acceptance (MS Windows treats both variants as the same layout), [29] has a unique mechanical layout, combining some features of the ISO 9995-3 and the JIS keyboards in order to fit 12 keys between the left and right Shift (compared to the American standard of 10 and the ...
A keyboard to be played by the hands is called a manual (from the Latin manus, "hand"); an organ with four keyboards is said to have four manuals. Most organs also have a pedalboard, a large keyboard to be played by the feet. [Note that the keyboards are never actually referred to as "keyboards", but as "manuals" and "pedalboard", as the case ...
Virtual keyboards are commonly used as an on-screen input method in devices with no physical keyboard where there is no room for one, such as a pocket computer, personal digital assistant (PDA), tablet computer, or touchscreen-equipped mobile phone. Text is commonly inputted either by tapping a virtual keyboard or finger-tracing. [10]