A keyboard is a device of a typewriter style in computing that utilizes an array of buttons or keys, to proceed as motorized jimmy or electronics switches. Adopting the rejecting of paper tape and punch cards interfacing through the style of teleprinter keyboards turned into the main input device of computer. In spite of progress of substitute input devices like the mouse, touch screen, pen devices and voice recognition and other technologies the keyboard continues to the most usually used and a jack of all trades devices made use of human input into computers.