OPL

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)

Libraries

 * Oakville Public Library, in Oakville, Ontario
 * Oshawa Public Library, in Oshawa, Ontario
 * Ottawa Public Library, in Ottawa, Ontario
 * One-person library
 * Omaha Public Library, in Omaha, Nebraska

Sports

 * Oceanic Pro League, a former professional League of Legends league in Oceania
 * Oman Professional League, an association football league in Oman

Other

 * Luxembourg Philharmonic Orchestra, abbreviated to OPL
 * On Patrol: Live, an American docuseries that uses the abbreviation OPL
 * Optique & Précision de Levallois (1911-1964), a former French optical company
 * Open Publication License, license predating Creative Commons licenses
 * Operating lease
 * Organisation du Peuple en Lutte ("Struggling People's Organization"), a Haitian political party