User talk:Jaspreetkaur401

History Of Computers
Essentially there are three types of calculating devices manual, mechanical and automatic.The earliest manual device was abacus. The abacus was invented around 600 B.C. and in this device the numbers are represented by position of beads on a rack and it carried out simple additions and subtractions rapidly and efficiently. The first mechanical adding machine was invented by Blaise Pascal in 1642. This machine was limited to the computation of additions and subtractions. Multiplication and divisions burden as the series of additions and subtractions respectively. Later on Baron Gotfired Wilhelm Von Laibniz of Germany invented the machine which could add ,subtract, multiply and divide although this machine was able to do such calculation but the result was in accurate and late. Charles Babbage, a 19th century professor known as the father of modern digital computer composed a machine known as Analytical Engine. It incorporates a punched card input, a memory unit for storage, an arithmetic unit, an output unit and a control unit. It was capable of performing the basic arithmetic functions for any mathematical problem and about 60 additions per minute. This machine was designed as a proto type machine some other well known early computers are: 1. Mark-1 Computer: This was the first fully automatic calculating machine designed by Howard Aiken of Harward University in collaboration with IBM. It was very complex huge and very slow. 2 . ENIAC Machine: Electronic Numerical Integrator And Calculator was a huge machine weighing 30 tons required around 18000 vacuum tubes performed about 5000 editions per second consumed 150 KW of power and also require a big room for its placement. It was designed by a team lead by professor J.Presper Eckertand John Mauchly of U.S.A. in 1943. 3. EDVAC Machine : The Electronic Discrete Variable Automatic Computer machine was designed on stored program concept by John Vin Neumann. He introduced an idea of storing both instruction and data in binary form i.e.,0 and 1. This machine was developed in 1946. 4. UNIVAC -I Machine : The Universal Automatic Computer was installed firstly in Census Bureau in 1951. Jaspreetkaur401 (talk) 15:09, 24 April 2024 (UTC)