Computer knowledge

Arithmetical Replica:- In 1694,a German mathematician and philosopher Gotofuied Withem Von Leibuiz improved Pascaline by creating a machine that could also multiply and divide.This mechanical machine worked with the help of gears and dials. Arithometer:- Charles Xavier Thomas de colmar, a Frenchman fabricated a machine that could perform the four basic arithmetic functions of addition, subtraction, multiplication and division.

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 .

In 1617,Sir John Napier constructed a calculating device for multiplication, division, addition and subtraction. This device is made up of a set of eleven rectangular rods. Each rod was divided into ten squares. The top squares had digits 0 to 9.The square below had the multiple of the digit written in them. By placing rods in Line in a special manner,can be used for multiplying large number with high speed. The improved version Napier's bones was used for division and square roots also. These rods were made up of curved bones and that is why the device is known as Napier's Bones.

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.

Welcome friends, Let us have a look on some early computing machine. CALCULATING DEVICES OF EARLY AGE ABACUS  was the first calculating device,invented in the sixteenth century in CHINA. The word ABACUS is derived from the Greek word,ABAX,meaning table or board covered with dust. ABACUS allows users to make computations using a system of sliding beads arranged in a wooden frame. In earlier days,ABACUS was mainly used by merchants for doing business Account calculations. ABACUS works on the principal of place-value notation. simple calculations like,addition or subtraction are performed by shifting beads on earlier sides. The three most popular ABACUS are- Chinese , Japanese and Russian : Chinese Abacus:- The Chinese abacus was the first abacus to be developed. it consists of a rectangular box like wooden frame having a middle bar ,which partitions the frame into two parts-a bigger section and a smaller section.the rectangular box also consists of vertical wires,...