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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’.
LADY ADA LOVELACE’S PROGRAMS Analytical Engine
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.
Evolution of Computers
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