Unix Network Programming is a book written by W. Richard Stevens. It was published in 1990 by Prentice Hall and covers many topics regarding UNIX networking. The book focuses on the design and development of network software under UNIX. The book provides descriptions of how and why a given solution works and includes 15000 lines of C code. The books summary describes it for "programmers seeking an in depth tutorial on sockets, transport level interface (TLI), interprocess communications (IPC) facilities under System V and BSD UNIX." The book is translated into several languages, including Chinese, Italian, German, Japanese and others.