The Unix System (ISBN 0-201-13791-7) is a book by Stephen R. Bourne; it was the first widely available general introduction to the Unix operating system. It included some historical material on Unix, as well as material on using the system, editing, the software tools concept, C programming using the Unix API, data management with the shell and awk, and typesetting with troff.
References
The Unix System Wikipedia(Text) CC BY-SA