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A computer is a device that can be instructed to carry out arbitrary sequences of arithmetic or logical operations automatically. The ability of computers to follow generalized sets of operations, called .... Early digital computers were electromechanical; electric switches drove mechanical relays to perform the calculation.


The history of the personal computer as a mass-market consumer electronic device began with ... Early personal computers – generally called microcomputers – were sold often in electronic kit form and in limited numbers, ..... IBM 5100 was a desktop computer introduced in September 1975, six years before the IBM PC.


Jun 27, 2017 ... The ENIAC was invented by J. Presper Eckert and John Mauchly at the ... About 44,000 Programma 101 computers were sold, each with a ...


Invention of the PC: The Computer Age. The earliest electronic computers were not “personal” in any way: They were enormous and hugely expensive, and they  ...


The ABC was at the center of a patent dispute related to the invention of the .... While many early digital computers were based on similar designs, such as the ...


Sep 8, 2015 ... The history of computers starts with industrial and governmental ... John Bardeen and Walter Brattain of Bell Laboratories invent the transistor.


Personal computers are now a very common item in many houses yet in 1955, there were only 250 computers in use throughout the world. In 1980, more than ...


Nov 10, 2011 ... If someone up and asked you "who invented the computer," how would you respond? ... Computers ... The problem: Where the Difference Engine's plans were complete, the Analytical Engine's were a work-in-progress.


Apr 27, 2012 ... In 1822, Charles Babbage purposed and began developing the Difference Engine, considered to be the first automatic computing engine that ...