The document discusses the evolution of early calculating devices such as the abacus, Napier's bones, and the Pascaline, as well as more advanced machines like the Difference Engine and Analytical Engine. It then outlines the five generations of computers, from the first generation that used vacuum tubes and were very large and slow, to the current fifth generation that uses microprocessors and artificial intelligence to build very small, powerful supercomputers.

1. EVOLUTION OF
COMPUTER
Presentation by
Malaika tariq

2. EARLY CALCULATING DEVICES
Some of the early calculating devices were:
Abacus : The first calculating device.
Napier’s bone : it had numbers carved on bones or on strips of wood.
Pascaline : the first mechanical calculator , consist of a rectangular box.
Difference engine :a machine to prepare mathematical tables.
Analytical engine :the first general purpose computer.

3. GENERATIONS OF
COMPUTER
First generation :
very large
Very slow
Main component is vacuum tubes.

4. second generation:
Smaller size
Main component is transistor
Faster and cheaper
Third generation:
smaller size
Main component is integrated circuit
Increased storage

5. Fourth generation:
decreased size
Main component microprocessor
Greater computing power
Fifth generation:
Very small size
Artificial intelligence
Super cmputers