HISTORY OF COMPUTER :
A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations computation automatically.Modern digital electronic computers can perform generic sets of operations known as programs these programs enable computers to perform a wide range of takes.A computer system is a nominally complete computer that includes the hardware,operating system main software and peripheral equipment needed and used for full operation.
This term may also refer to a group of computers that are linked and function together ,such as a computer network or computer cluster. A board range of industrial and consumer products use computers as control systems.
Simple special-purpose devices like microwave ovens and remote control are include as are factory devices like industrial robots and computer aided design as well as general purpose devices like personal computers and mobile devices like smartphones. Computer power the internet which links billions of other computers and users. Early computers were meant to be used only for calculations.
Simple manual instruments like the abacus have aided people in doing calculations since ancient times .Early in the industrial revolutions some mechanical devices were built to automate long tedious tasks such as guiding patterns for looms .More sophisticated electrical machines did specialized analog calculations in the early 20th century.
ABACUS:
Abacus was a simple calculating device .It was developed 5000 year ago it was used to perform simple addition and subtraction. Abacus was a wooden rack .It contained horizontal wires with beads strung on them. The bead across the wires could move easily .These beads were moved across the wires according to specified rules to perform the simple arithmetic operation.
NAPIER,S BONES :
John Napier Scottish mathematician .He created logarithm tables for arithmetic calculating he also developed a calculating device using rod knows as Napier bones. The calculating device slide rule was also developed using the concept of logarithms. The slide rule could be used to perform
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