INPUT DEVICES
INPUT DEVICE: An input device is an electromechanical device that accepts data from user or outside world and translate them into a form a computer can interpret. Ex- Keyboard : A standard desktop keyboard is the most common input device. It is mainly used to type term and to send the instructions to a computer with the help of keys. Keyboard keys are the buttons that represent alphabets, numeric, alphanumeric and special characters. The key can be used individually or in combination with other keys. The keyboard normally contain 100 to 108 keys. Depending on the position or placement of the keys, the layout of a keyboard comes in various styles such as QWERTY, QWERTZ, AZERTY and DVORAK. QWERTY keyboard is the most commonly used keyboard . It is based on the English language name is derived from the sequence in which six alphabetical keys are positioned on the upper line of the keyboard. AZERTY type keyboard is mostly used in France (‘A’ and ‘Z’) Characters replace ‘Q’ a