객체 지향 프로그래밍
Erlang applications are built of very lightweight Erlang processes in the Erlang runtime system. Erlang processes can be seen as "living" objects (Object-oriented programming), with data encapsulation and message passing, but capable of changing behavior during runtime. The Erlang runtime system provides strict process isolation between Erlang processes (this includes data and garbage collection, separated individually by each Erlang process) and transparent communication between processes on different Erlang nodes (on different hosts).