Keyboard is a device that converts letters, numbers, and other characters into electrical signals that are machine readable by the computer processor. The keyboard may look like a type writer keyboard to which some special keys have been added. Keyboard has 3 categories.
1. Alphabet keys (A,B,C..Z, a,b,c.....z)
2. Numeric Keys (1,2,3,4,5....10)
3. Special Keys (F1,F2,.....F12, Alt, Ctrl, Shift, Tab, Capslock, enter...etc).
The standard keyboard has 101 buttons on it and now there are 104,106,110 keyboards are available in the market.
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