"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 time, store complex graphics and databases, and link to other UNIX and mainframe computer systems, including DOS since the late 1980s. UNIX-based systems control various programs written by many companies to distribute information between multiple computers within the network. This minimizes user costs and eliminates system-wide hardware crashes. Some of the original UNIX programs are still evident today. UNIX was developed at AT&T in 1969, primarily for controlling the phone network and handling government communications. Hewlett-Packard, IBM, Sun Systems, other U.S. companies and international companies now sell versions of UNIX that work best on their computers. UNIX has enjoyed a long, exclusive history, but Microsoft is trying to establish Windows NT as the premier Web server and replace UNIX's dominant position as the Internet's operating system. Although the Internet was originally developed around UNIX, some companies who design software for the Internet are becoming reluctant to embrace UNIX...
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