PREFACE
Unix is one of the most powerful and widely used operating systems. It was conceived at AT&T's Bell Laboratories during early 1970s. Among many who fostered this operating system, particularly at the early stages, the contribution of the University of California at Berkeley is notable. Since then, it has grown in strength day by day. The sheer existence of this operating system over the past three decades itself speaks for its strength. It offers word-processing capability, networking facility, information retrieval and processing, and much more. Although powerful, it was not popular among users initially because it was developed for researchers by researchers, had trade restrictions, and also lacked a user-friendly device.
The addition ...
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