Developing electronic computers: The development of electronic computers has gone through several generations, starting with the first use of computers. Operational research, then it developed and became the reception of textual data with numbers, and therefore it began It is entitled to its immense launch and it can be used in a wide range of fields. The progress of this development:: 1956 - 1940: The first generation 1-2-1-3 The first computer was designed in 1946 by John Mosley, "Eckart". Gold Shiati is called ENIAC, and it is based on the mechanical calculator. It is a computer 1 that the French scientist Pascal and the English scientist Babbage have reached. 2 programmed to place instructions on a perforated tape The first commercial computer to be sold was the ENIVAC computer, which was not sold. 3 Except in 1951 These computers were operated by tubes or vacuum valves, and generally distinguished The computers in this stage are large, high cost and slow to accomplish their tasks, in addition to that The work was carried out separately one another. : 1963-1956 Second generation 2-2-1-3 It appeared at the end of the fifties and at the beginning of the sixties, and the transistor replaced the Vicious pipes. It was in 1958, eleven years after the invention of the transistor, and the first 4. 5 computer using a transistor designed by the engineer Cray mour Se