Basic knowledge about computer.

                 WELCOME TO THE COMPUTER WORLD 

 

Q no.1) What is COMPUTER ?

= Computer is an electric machine that perform arithmetical and  logical operation.

And also computer is an electronic device that input data as a raw material and then process it and at last give output as a result. 

                          History  of  Computer

1)  Abacus:- An abacus is a mechanical device used to aid an individual in performing mathematical calculations. The abacus was invented in 2400  BC. It is used to perform basic arithmetical operations.

2)  Napier’s Bones:- It was invented by John Napier in  1614. It allows the operator to multiply, divide, and calculate square and cube root by moving the rods around and placing them in specially constructed boards.

3)  Slide Rule :- It was invented by William Oughtred in 1622. It is based on Napier’s ideas about logarithms used primarily for multiplication, divisions, roots, logarithms and Trigonometry. Not normally used for addition and substration.

4)  Pascaline:- It was invented by Blaise Pascal in 1642. It was it’s limitation to addition and substration. It was also too expensive.

5)  Stepped Reckoner:- It was invented by Gottfried William von Leibniz in 1672. The machine that can be add, subtract, multiply and divide automacially.

6)  ­­­­­Jacquard Loom:- The Jacquard Loom is a mechanical loom invented by Joseph- Marie Jacquard in 1881. It is an automatic loom controlled by punched cards.