Erlang ( UR-lang) is a general-purpose, concurrent, functional high-level programming language, and a garbage-collected runtime system. The term Erlang is used interchangeably with Erlang/OTP, or Open Telecom Platform (OTP), which consists of the Erlang runtime system, several ready-to-use components (OTP) mainly written in Erlang, and a set of design principles for Erlang programs.
The Erlang runtime system is designed for systems with these traits:

Distributed
Fault-tolerant
Soft real-time
Highly available, non-stop applications
Hot swapping, where code can be changed without stopping a system.
The Erlang programming language has data, pattern matching, and functional programming.
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Nov 3, 2026
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