Input Devices Input refers to the data or instructions which we feed  into a computer. Input devices are used to enrer data and information into a computer. The input unit converts the incoming data and instructions into a pattern of binary codes which is understood by a computer. Then it further supplies data to the processor for processing. Some of the input devices are: 1. Keyboard:  Keyboard is the one of the most important devices used to input data and instructions into a computer. The standard computer  keyboards  typically contain 101  keys. There are mainly five types of keys on a keyboard: types of keys Keyboard 2. Mouse: Mouse is the most commonly used input and pointing device that lets you select  and move items on the screen. The left mouse button is used  more, frequently than the right button. A single left  click selects an item while double-clicking on an item activates the application. The right-click  often displays...