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It originally named as UNICS in 1970. Today, the most common commercial operating system with based on UNIX are OS X and iOS from Apple Inc. (The Open Group 2012). In 1989s UNIX once had become one of the most commonly used multiuser operating system with over one million installation (Dunphy 1991, 57). Even today UNIX based operating system still under development and had been spread to industries of all kind and shows a dominant force in the computer industry.
UNIX operating system as an application development environment were majority used as scientific study and technical application. The first commercial use of the UNIX operating system was installed in a telephone company American Telephone and Telegraph AT&T Bell Labs on Digital Equipment Corporation PDPII computers (Ambler, et al. 1996, 3). At that time frame, AT&T monopolized the telephone industry in United State, and used UNIX for their software development and network transaction operation (Ambler, et al. 1996, 3).
The UNIX quickly spread outside of Bell Labs and its telephone business to others field of industries which...

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