The book was written by a well-known expert on the UNIX operating system and is dedicated to describing one of the forms of interprocess communication, IPC, which is used to create most complex programs. It describes four possibilities for dividing tasks between several processes or threads of one process: message passing, synchronization, shared memory, remote procedure call. The book contains a large number of illustrative examples and can be used as a textbook on IPC, and as a reference for experienced programmers.< /p>