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2 Timeline of

Computing

Core Concepts

On completion of this chapter you will be able to know:
¨ Early Calculating Devices ¨ Mechanical Counting Devices
¨ Electromechanical Counting Devices ¨ Electronic Counting Devices
¨ Modern Calculating Devices or Computers ¨ Generations of Computers

Warm Up #Art Integration

Draw and colour the picture of computer in the space given below.

When do you think a computer was developed?
12 years back 30 years back More than 50 years

The computer that we use today is a product of a number of improvements that have

occurred over a period of time. Let's learn about the history of computers from the
beginning.

EARLY CALCULATING DEVICES

Stones, sticks, fingers, pebbles and cowries were used by early men to count. Even today, a
child learns to calculate using his/her fingers.

MECHANICAL COUNTING DEVICES

Mechanical counting devices were made after early counting devices. The limitations of

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