“UNIX was the first operating system designed to run on ‘dissimilar’ computers by converting most hardware specific commands in machine language into an independent programming language called ‘C ’” . UNIX was the basis of AT&T’s telephone system and the government’s wide area network system. Then it became the basis of communication between engineers and scientists, and eventually the basis of communication for everyone worldwide. It has held this remarkable spot since 1969.
However, in the 1990s there are competitors in the market, namely, Microsoft Corporation with its Windows NT product. But UNIX-based software suppliers are not just turning over and letting the competitors win. UNIX remains, and will remain a major player in the marketplace. The unique advantage of the UNIX operating system when it was introduced was that it could (and still does) run on dissimilar machines, unheard of prior to 1969. UNIX also can run more than one program at a......
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