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Abstract During forty years, five computer generations are doped. The fifth computer’s generation, which is a :hrough in the computer’s history, enables the fiopment of computer market and computer’s use. Most ••’the computer users today are not computer specialists. the information technology has acquired great -est from researchers of different disciplines to op and enhance computer and information systems to with the users needs. The increasing volume and complexity of business lings have forced many companies to rely upon iters to help capture, distribute, store and manage lation flow required in tneir business -ations (King and Maryanski 1983).’” Due to the large and variable changes that have sn place in the communication of information over the few years, emphasis is placed on the technological tlopments - including the use of modern information iclogy systems Figure(1-1). |