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The Mechincal Devices
The first multi-purpose, i.e. programmable, computing device was the Charles Babbage's Difference Engine, which was begun in 1823 but never completed.The more passionate was the Analytical Engine. It was designed in 1842, but unfortunately it also was only partially completed by Babbage. -
Electro-Mechanical Devices
The earliest attempt to build an electronic computer was by J. V. Atanasoff, a professor of physics and mathematics at Iowa State, in 1937.The second attempt was a second early electronic machine was Colossus, made by Alan Turing for the Military.This machine played an important role in decoding codes used by the German army in World War II. -
First Generation Computers: The Stored Program Computer
A stored-program computer is one which stores program instructions in electronic memory. A computer with a Von Neumann architecture stores program data and instruction data in the same memory. THe computer was invented by John von Neumann. -
The Second Generation Computers: High-Level Programming Languages
Second-generation programming languages, originally just called low level programming languages, were created to simplify the burden of programming by making its expression more like the normal mode of expression for thoughts used by the programmer. The 2nd generation was invented John Backus for IBM in 1954, and released commercially in 1957 -
Third Generation Computers: Mainframes
IBM mainframes are large computer systems produced by IBM from 1952 to the present. During the 1960s and 1970s, the term mainframe computer was almost synonymous with IBM products due to their marketshare. Current mainframes in IBM's line of business computers are developments of the basic design of the IBM System/360. The inventor of the IBM in 1963 was Jack Kilby -
Fourth Generation Computers: The Personal Computer
The number of personal computers in use more than doubled from 2 million in 1981 to 5.5 million in 1982. Ten years later, 65 million PCs were being used. Computers continued their trend toward a smaller size, working their way down from desktop to laptop computers (which could fit inside a briefcase) to palmtop (able to fit inside a breast pocket). The person that made the Personal Computer (PC) was by IBM.
The Apple Corparations made an PC like the IBM's version called the Macintosh
