Transcription of Devices Input and Output UNIT 4 INPUT OUTPUT DEVICES
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Devices Input and Output UNIT 4 INPUT OUTPUT DEVICES
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)
types of monitors, printers, scanners and graphics tablet; and newer technologies in computer hardware. 4.2 INPUT OUTPUT (I/O) DEVICES The computer will be of no use if it is not communicating with the external world. Thus, a computer must have a system to receive information from the outside world and must
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