Classification of Digital Computer

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E-notes on Classification of Digital Computers Definition: A Computer A computer is an electronic device that accepts raw data, processes it according to a set of instructions and required to produce the desired result. The set of instructions is called Program and can be written using artificial languages like Basic, FORTRAN, C, C++, Java etc. The programs run under the supervision of an Operating System. Example for popular Operating Systems is Windows, UNIX, LINUX, Solaris etc. A computer consists of two main components: Hardware and Software: Hardware The hardware are the parts of computer itself including the Central Processing Unit (CPU) and related microchips and micro-circuitry, keyboards, monitors, case and drives (floppy, hard, CD, DVD, optical, tape, etc...). Other extra parts called peripheral components or devices include mouse, printers, modems, scanners, digital cameras and cards (sound, colour, video) etc... Together they are often referred to as a personal computers or PCs. Central Processing Unit (CPU) - Though the term relates to a specific chip or the processor a CPU's performance is determined by the rest of the computers circuitry and chips. Currently the Pentium chip or processor, made by Intel, is the most common CPU though there are many other companies that produce processors for personal computers. Examples are the CPU made by Motorola and AMD. With faster processors the clock speed becomes more important. It depends on the circuit board that the chip is housed in, or the motherboard, as to whether you are able to upgrade to a faster chip. The motherboard contains the circuitry and connections that allow the various components to communicate with each other. Though there were many computers using many different processors previous to this we can consider, the 80286 processor the advent of home computers as these were the processors

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