This is perhaps the canonical reference on Unix systems programming. Stevens and Rago provide just about everything the serious systems programmer might need to know about the internals of the Unix OS. Topics include file I/O, sockets, inter-process communication, error handling, process control, printing, threads, signals, system data files and much more. In spite of the in-depth coverage of UNIX only a basic familiarity with the ANSI c language or Unix is needed to begin; the book starts with basic topics such as input and output, writing to a file, and logging into a user account. It also covers the basic compiler tools needed to compile the over 10,000 lines of example code, all of which can be downloaded. Annotation ©2013 Book News, Inc., Portland, OR (booknews.com)