![]() Mouse is the most popular pointing device. Keyboard also contains some special purpose keys such as Enter, Shift, Caps Lock, Num Lock, Space bar, Tab, and Print Screen. Control keys also include Home, End, Insert, Delete, Page Up, Page Down, Control(Ctrl), Alternate(Alt), Escape(Esc). ![]() These keys provide cursor and screen control. Each function key has a unique meaning and is used for some specific purpose. The twelve function keys are present on the keyboard which are arranged in a row at the top of the keyboard. Generally, it consists of a set of 17 keys that are laid out in the same configuration used by most adding machines and calculators. ![]() It is used to enter the numeric data or cursor movement. These keys include the letter keys (A-Z) and digit keys (09) which generally give the same layout as that of typewriters. The keys on the keyboard are as follows − S.No Keyboards are of two sizes 84 keys or 101/102 keys, but now keyboards with 104 keys or 108 keys are also available for Windows and Internet. The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions. Keyboard is the most common and very popular input device which helps to input data to the computer. Following are some of the important input devices which are used in a computer −
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