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Unix was developed by AT&T's Bell Laboratories in the USA during the late 1960s, using the programming language C. It could therefore run on any machine with a C compiler, so ensuring its wide portability. Its wide range of functions and flexibility, together with the fact that it was available free of charge from 1976 to 1983, led to its wide use by universities and in commercial software.
The stars are said to represent Syria and Iraq. Red, white, black, and green are the pan-Arab colours. Effective date: 29 March 1980.
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