Development of Computers

Development of Computers The earliest known device to record computations was the abacus. It dates back to ancient times and was invented by the Chinese. Ten beads were strung onto wires attached to a frame. Addition and subtraction were read from the final positions of the beads. It was considered the first manual tool used in calculating answers to problems that provided information and in a primitive way storing the results. Abacus Mechanical Clock During the Middle Ages the first closed system in terms of calculating information was invented by use of a mechanical clock. The parts of the clock calculated the time of day. The time was displayed through the position of two hands on its face. The inventor pre-programmed the clock instructions through the manner in which the pull of the weights and the swing of the pendulum with the movement of the gears established the position of the hands on the clock face. Mathematics John Napier (Scotsman mid 1600s) discovered logarith

Development of Computers Summary

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Before Christ

Abacus It was made of beads and wood Used by Asian Merchants to count Wealth


Log Tables Paper and Pen Used to calculate complex mathematical calculations


Mechanical Calculator Calculator to solve complex mathematical calculations


Analytical Engine Computer Combine arithmetic process with decision based on its own computer


First Generation Computers Computer(used thermionic valves and vacuum tubes to process data) Store and process data


Second Generation Computers Computer(used transisters to process data) Store, transmit and process data 


Third Generation Computers Computers(used intergrated circuits (ICs) to process data) Store, transmit and process data with better storage and increased speed of processing


Fourth Generation Computers Computer(used VLSI-very large scale intergrated circuits to process data) store, transmit and process data with better storage and increased speed of processing than 3G computers


Fifth Generation Computers Computers(Use advanced VLSI in the name of microprocessor to processor data) Store, Transmit and process data with better storage and increased speed of processing, small in size and emit less heat and consumes less power. Faster than 4G computers and also portable.


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