Erlang is a programming language designed at the Ericsson Computer Science Laboratory. Open-source Erlang is being released to help encourage the spread of Erlang outside Ericsson. We are releasing free of charge: The entire source code of the current Erlang system. Extensive libraries of code for building robust fault-tolerant distributed applications. All with documentation. All the above software has been battle tested in a number of Ericsson products, for example AXD301 (ATM switch).

Erlang Public License (EPL). EPL is a derivative work of the Mozilla Public License (MPL). It contains terms which differ from MPL, mainly in terms of jurisdiction. The license is constructed in accordance with the laws of Sweden. EPL translation A text intended to help you understand the legal text. The legal text is the license, so if you have any doubts, refer to the legal text.

Commercial Erlang/OTP There are a number of products available that may be of interest for professional and amateur Erlang programmers (printed documentation, courses, etc).