Evolution of computer





 Computers are one of the greatest inventions in this world. Computers are a revolutionary. Earlier computers were used for calculation, but now everything is changed. Now we can use computers for everything. 

The journey of computer stars from:

1. Abacus: Many centuries ago when man started to count the numbers, he thought of a device that can trace the numbers, and thus came the existence of the ABACUS. It was the first counting device that was developed in China more than 3000 years ago. The name Abacus was obtained from the Greek word Abax which means slab. This device basically consists of a rectangular wooden frame and beads.

The frame contains horizontal rods and the beads which have holes are passed through the rods. Counting was done by moving the beads from one end of the frame to the other.



















2. Napier’s Bones: It is a device that contains a set of rods made of bones. It was developed by John Napier, a Scottish Mathematician and hence the device was named Napier’s Bones. The device was mainly developed for performing multiplication and division. Later in 1614 he also introduced logarithms.






















3. Pascaline: Pascaline is a calculating machine developed by Blaise Pascal, a French Mathematician. It was the first device with the ability to perform additions and subtractions on whole numbers. The device is made up of interlocked cogwheels which contain numbers 0 to 9 on their circumference. When one wheel completes its rotation the other wheel moves by one segment. Pascal patented this device in 1647 and produced it on a mass scale and earned a handful of money.


4:Punched Card System: Punched Card System is used for storing and retrieving data. This was invented by Herman Hollerith, an American Statistician in US Census Bureau. The system stores the data coded in the form of punched holes.








In today's time, we have all types of computers. For every use.








                                                                                                               SuperComputer   


 









Mainframe computer













Personal computer

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