OPL may stand for:
== Computing and technology == Open Programming Language Optical path length Optimization Programming Language, a modelling language designed for the CPLEX Optimization software FM Operator Type-L, a series of sound chips made by Yamaha: YM3526 (OPL) YM3812 (OPL2) YMF262 (OPL3) YMF278 (OPL4)
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).