Erlang is a concurrent, functional programming language designed for programming large industrial real-time systems. The language is untyped and has a pattern matching syntax. Functions are written as a set of recursion equations and the language has explicit concurrency and asynchronous message passing. Written in a tutorial style, this book emphasizes learning through example, illustrating a number of problems in designing and programming concurrent fault-tolerant real-time systems. This edition features new chapters on distributed programming, distributed programming techniques and distributed data.