Transcription of Devices Input and Output UNIT 4 INPUT OUTPUT DEVICES
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75 INPUT and OUTPUT DEVICES UNIT 4 INPUT OUTPUT DEVICES Structure Page No. Introduction 76 Objectives 76 INPUT OUTPUT DEVICES 76 What is a Port ? 78 Parallel Port 78 Serial Port 79 Universal Serial Bus (USB) 79 Small Computer System Interface (SCSI) Port 79 INPUT DEVICES 80 Keyboard 80 Mouse 81 Digitizing (Graphic) Tablet 82 Trackball 82 Joystick 83 Pick DEVICES 84 Light Pens 84 Touch Screens 84 Source Data Entry DEVICES 85 Digital Camera 85 Scanner 86 Optical Mark Reader (OMR) 86 Magnetic Ink
Input/output devices constitute a major part of a computer system. These are also called peripheral devices. Without I/O devices, a user cannot communicate with the computer. They are required to enter data and instructions in a computer so that the computer can process that data and provide the result to the user ...
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