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History of Computer

Before the invention of Computer, Calculator was introduced. Main difference between Calculator and Computer is that Computer can do logical operations and calculators can’t do logical operations.


Abacus was developed in china in 2600 B.C by some Chinese people. The Word Abacus means calculating board. This apparatus used a series of moveable beads or rocks. The positions changed to enter a number and again to perform mathematical operations. 
The abacus, also called a counting frame, is a calculating tool used for performing arithmetic processes. It is made of a beads or stones placed in grooves or strung on rods. Abacus is a Latin word that has its origins in the Greek words abax or abakon (meaning "table" or "tablet"). 
Leonardo DaVinci was credited with the invention of the world’s first mechanical calculator in 1500. In 1642, Balise Pascal invented Adding Machine. Blasie Pascal’s supporter think that Mechanical Calculator was introduced by Pascal.
Napier’s Bones - John Napier was a mathematician who became famous for his invention of logarithms. John Napier built device for the purpose of multiplication in 1617 A.D The device was known as Napier’s bones. His bones are set of eleven rods side by side products and quotients of large numbers can be obtained. The sticks were called bones because they were made of bone of ivory. 
Charles Babbage was known as Father of computer. He invented Two machines. (i) In 1822, introduced Difference Engine. (ii) In 1834, introduced Analytical Engine. It was first demonstrated in Paris Museum.

First Digital Computer

ENIAC was the first digital computer. The ENIAC was invented by J. Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed until 1946. It occupied about 1,800 square feet and used about 18,000 vacuum tubes as a storing device to store data, weighing almost 50 tons.
First computer with RAM - MIT introduces the Whirlwind machine March 8, 1955, a revolutionary computer that was the first digital computer with magnetic core RAM and real-time graphics.
The first minicomputer - In 1960 Digital Equipment Corporation released its first of many PDP computers the PDP-1.
The first laptop - First Laptop was introduced in 1981 by Adom Osborne and the company “EPSON” manufactured first Laptop.
The first computer company - The first computer company was the Electronic Controls Company and was founded in 1949 by J. Presper Eckert and John Mauchly, the same individuals who helped create the ENIAC computer. The company was later renamed to EMCC or Eckert-Mauchly Computer Corporation and released a series of mainframe computers under the UNIVAC name.
The first multimedia computer - In 1992 Tandy Radio Shack becomes one of the first companies to release a computer based on the MPC standard with its introduction of the M2500 XL/2 and M4020 SX computers.
The first Apple computer - Steve Wozniak designed the first Apple known as the Apple-I computer in 1976.

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