OSL may refer to: Science and Technology Open Shading Language, a shading language Open Software License, an open-source software license Optically stimulated luminescence, a method of measuring doses from ionizing radiation, which is often used in mineral dating Groups, organizations, companies Sosoliso Airlines, ICAO airline designator Ontario Soccer League, a semi-pro soccer league in Ontario, Canada Orchestra of St. Luke's, chamber orchestra in Manhattan, New York City Order of Saint Luke, a Methodist religious order Oregon Short Line Railroad, a former railroad in the U.S. states of Wyoming, Idaho, Utah, Montana and Oregon Oud-Strijders Legioen, a Dutch right-wing organization (1952–2010) Events Ongamenet Starleague, a tournament for professional StarCraft players in South Korea Outside Lands, a music and arts festival that takes place annually in San Francsico's Golden Gate Park Other uses Oslo Airport, Gardermoen, IATA airport code Osl, a Hungarian gens originating in the 12th century See also OSI (disambiguation)