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In 1833, he invented a machine called the Analytical Engine,
the first-ever working model of a mechanical computer, a fully

program controlled machine. This is why Charles Babbage is
known as the ‘father of computers’.

Analytical Engine
LADY ADA LOVELACE’S PROGRAMS

The instructions given to Babbage’s Analytical Engine were in the
form of 0s and 1s and the first person to introduce this concept was

Lady Ada Lovelace. Since she was the first to introduce the concept
of programming, she is known as the first computer programmer.

GENERATIONS OF COMPUTERS

Lady Ada Lovelace
Generations Features

Huge in size

First Generation (1940s) Very expensive
Made up of vacuum tubes

Made up of transistors
Magnetic tapes were used to store data
Second Generation (1950s) Small in size and less expensive than
the first generation computer

Faster and reliable

Computers were made of ICs
Use of the ICs reduced the size and
Third Generation (1960s)
increased the speed of the computers
More affordable and dependable

Microprocessors were invented

Small in size and could be placed on an
Fourth Generation (1970s) office table
Hard disk to store data
Introduction of GUI operating system

Use artificial intelligence

Improved size, cost, speed and
Fifth Generation (1980s– performance
Present)
New versions of GUI operating
systems are developed.

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