OTP
OTP (Open Telecom Platform) is a set of libraries, tools, and design principles for building scalable, fault-tolerant, distributed systems in Erlang. It provides abstractions like supervisors, gen_servers, and applications to manage concurrency, error handling, and hot code upgrades. Originally developed for telecom systems, it's now widely used in high-availability applications across various industries.
Developers should learn OTP when building Erlang-based systems that require high reliability, such as messaging platforms, financial trading systems, or IoT backends, as it simplifies handling failures and concurrency. It's essential for leveraging Erlang's strengths in distributed computing and is a core skill for roles in telecom, gaming, or any domain needing robust real-time systems.