SDL may refer to: Computing Specification and Description Language, defined by ITU Simple DirectMedia Layer, a C programming language library Services Description Language, a Microsoft fore-runner to Web Services Description Language Scene Description Language, used by POV-Ray Structure Definition Language of OpenVMS Security Development Lifecycle, a software development process Organizations Party of the Democratic Left (Slovakia) (SDĽ, 1990–2004) Former Party of the Democratic Left (Czech Republic) Party of the Democratic Left (2005), SDĽ, Slovakia Scottish Defence League, a far-right anti-Muslim organisation Social Democratic League of America, 1917-1920 Software Development Laboratories, the original name of what is today known as Oracle Corporation Soqosoqo Duavata ni Lewenivanua, a political party in Fiji Space Dynamics Laboratory, at Utah State University, US SDL plc (formerly SDL International), a UK translation tool company Other uses Saudi Digital Library Shielded data link connector, an electrical signal connector Sexual division of labour Sound Digital - also known as SDL National, a digital radio multiplex in the United Kingdom Standard Deontic Logic, an extension of classical propositional logic Sundsvall-Härnösand Airport, by IATA airport code Scottsdale Airport, by FAA airport code