input device

Definition

Component or peripheral (such as a barcode reader, graphic tablet, keyboard, magnetic-stripe reader, modem, mouse, scanner, stylus) that feeds data or instruction into a computer for display, processing, storage, or outputting or transmission. Input devices convert the user's actions and analog data (sound, graphics, pictures) into digital electronic signals that can be 'handled' or 'read' by a computer. Digital data (such as from barcode readers, modems, scanners, etc.) does not require any conversion and is input direct into a computer. It is through input devices that a user exercises control over a computer, its operations, and outputs.