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EDVAC (Electronic Discrete Variable Automatic Computer) was one of the earliest electronic computers. It was built by Moore School of Electrical Engineering, Pennsylvania. Along with ORDVAC, it was a successor to the ENIAC. Unlike ENIAC, it was binary rather than decimal, and was designed to be a stored-program computer.
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Fortran computer programs have been written to support scientific and engineering applications, such as numerical weather prediction, finite element analysis, computational fluid dynamics, geophysics, computational physics, crystallography and computational chemistry.
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The third generation of computers introduced used IC (Integrated Circuit) in computers. Using IC's in computers helped reduce the size of computers even more than second-generation computers, and also made them faster. Nearly all computers since the mid to late 1960s have utilized IC's.
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The fourth generation of computers took advantage of the invention of the microprocessor, commonly known as a CPU (Central Processing Unit). Microprocessors, with integrated circuits, helped make it possible for computers to fit easily on a desk and for the introduction of the laptop.