After studying this unit, you will be able to:
• Explain the definitions of peripheral devices.
• Describe different types of input devices like punched cards, 
keyboards,
• mouse, digitizers and scanners and output devices like printers, 
plotters, video display terminals and microfilms, their broad 
design, their features advantages and disadvantages.
• Discuss the common peripheral devices, their physical 
appearances and the
• mode of operation of these dev ices. The student would be able to 
use these devices in the practical efficiently.