SLIDE RULE and PASCALINE

Slide rule:-

The slide rule was invented by William Oughlted.Calculations in the slide rule are done using Logarithms.

Pascaline:-

Blaise Pascal invented a numerical wheel wheel calculator. this calculator consisted of a rectangular box which had eight movable

wheels.It was used to sum numbers,consisting of eight digits.the speed of adding a number using PASCALINE was very fast as compared to the other devices available at that time .

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COMPUTER-A MACHINE

Dear friends, look at these pictures. These are pictures of different machines. Machines are man-made things. They help us to do different types of work. All machines have some things in common. Most machines run on electricity Some machines run on fuel. Some machines work with human power. In the same way.... A Computer is also a machine. it runs on electricity. a Computer can do many things. Let us see,what does a Computer do.

DIFFERENTIAL ENGINE

THE REAL BEGGINING OF COMPUTERS OCCURED IN THE 19TH CENTURY,WHEN CHARLES BABBAGE INVENTED FIRST MECHANICAL COMPUTER. THIS LAID THE FOUNDATION OF THE MODERN COMPUTER. CHARLES BABBAGE WAS A PROFESSOR OF MATHEMATICS AT THE CAMBRIDGE UNIVERSITY .HE FIRST INVENTED A MACHINE THAT WAS USED TO CALCULATE THE RESULT OF DIFFERENT EQUATIONS.THIS MACHINE WAS CALLED DIFFERENTIAL ENGINE .THIS MACHINE GOT POWER FROM STEAM.THE MACHINE HAD SOME INSTRUCTIONS STORED IN IT AND THE IT PERFORMED CALCULATIONS ACCORDING TO THE INSTRUCTIONS THE DIFFERENTIAL ENGINE WAS ACCURATE UP TO 20 TH POSITION OF DECIMAL. AFTER 10 YEARS LATER, BABBAGE INVENTED THE FIRST GENERAL COMPUTER KNOW AS THE ANALYTICAL ENGINE.IT HAS THE SAME BASIC ELEMENTS AS THE MODERN COMPUTERS. THE ANALYTICAL ENGINE HAD INPUT,OUTPUT AND MEMORY DEVICES .THE INPUT DEVICE HAD PERFORATED CARDS WHICH CONTAINS INSTRUCTIONS .THE ANALYTICAL ENGINE HAD MEMORY WHICH WAS LARGE ENOUGH TO STORE 1000 NUMBERS UP TO 50 DECIMAL DIGITS LO...

Computer knowledge

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