Wikipedia Definition: Erlang programming language

http://en.wikipedia.org/wiki/Erlang_(programming_language)

"Erlang is a general-purpose concurrent programming language and runtime system. The sequential subset of Erlang is a functional language, with strict evaluation, single assignment, and dynamic typing. For concurrency it follows the Actor model. It was designed by Ericsson to support distributed, fault-tolerant, soft-real-time, non-stop applications. It supports hot swapping so code can be changed without stopping a system. [1] Erlang was originally a proprietary language within Ericsson, but was released as open source in 1998. The Ericsson implementation primarily runs interpreted virtual machine code, but it also includes a native code compiler (not supported on all platforms), developed by the High-Performance Erlang Project (HiPE) at Uppsala University. It also now supports interpretation via escript as of r11b-4."

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