Question

Classify into , output or secondary storage . Light pen

Answer 1

Answer:

INPUT – OUTPUT DEVICES

Objectives

After completing this unit, you will be able to:

· Understand the various Input Devices.

· Understand the various Output Devices.

· Understand how Storage Devices work.

· Understand the working of Communication Devices.

Structure

3.1 Introduction

3.2 Input Devices

3.3 Output Devices

3.4 Communication Devices

3.5 Storage Devices

3.6 Summary

3.7 Self-Assessment Questions

3.1 INTRODUCTION

Input devices are devices that bring information into a computer. Pure input devices include punched card readers, paper tape readers, keyboards, mouse, drawing tablets, touchpads, trackballs, game controllers, etc.

Output devices are devices that are responsible for retrieving information. Pure Output devices include cardpunches, paper tape punches, LED displays (for light emitting diodes), monitors, printers, pen plotters, etc. Output devices can be classified as softcopies and hardcopies. Softcopy comprises of all the varied types of monitors where the user can see only the information displayed/retrieved based on certain processing instructions whereas the hardcopy comprises of all the varied types of printers wherein the user can print the information on paper.

3.2 INPUT DEVICES

1. The Keyboard - Standard Keyboard Layout

A standard computer keyboard has about 104 keys. Most keyboards use the QWERTY layout, named for the first six keys in the top row of alphabets.