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DIFFERENCE ENGINE
In 1822, Charles Babbage, a mathematician, invented the
Difference Engine. It was the first automatic calculator and was
capable of performing mathematical calculations automatically.
ANALYTICAL ENGINE
In 1837, Charles Babbage devised another calculator called
Analytical Engine. It is the first-ever working model of a
mechanical computer and a fully program controlled machine.
This is why Charles Babbage is known as the 'father of computers'.
Tick ( ) if you know this.
▶ Abacus was invented by the Chinese people.
▶ John Napier was a Scottish mathematician.
PURE
Lady Ada Lovelace is known as the first computer programmer as she created
the first computer program in 1883. FACT
GENERATION OF COMPUTERS
After these early calculating machines, the present computer took its shape in five
generations. Let's learn about them.
FIRST GENERATION
Timeline: 1940s
Technology: Vacuum tubes
Example of Computer: ENIAC, EDVAC,
UNIVAC – I, MARK I
Features:
Very expensive
Quite large and generated a lot of heat
Very low speed
The Computer Timeline 17

