Thanks for raising this question regarding Erlang.
The Erlang programming language is open source and has been around for over twenty years. It is a language that was first and foremost designed by Ericsson.
The language was created to replace the well proven Stored Program Control PLEX language that was used with the Ericsson's Mobile and Wireline Products.
Erlang is a programming language used to build massively scaleable soft real-time systems with requirements on high availability. Erlang's runtime system has built-in support for concurrency, distribution and fault tolerance.
Companies such as WhatsApp, Facebook Chat Backend,Klarna (electronic payment), numerous Universities, etc.. have solutions based on Erlang.
erlang dot com (erlang.com)
Erlang Programming Language - Danish mathematician and engineer Agner Krarup Erlang and a syllabic abbreviation of "Ericsson Language."
PLEX - Programming Language for Exchange (AXE10)
RITESHH KAKKAR - 14th November 2018 (08:54 GMT)
What is Erlang where it is used in whatsapps