MSL may refer to:

University degrees

* ASU_School_of_Sustainability, Master of Sustainability Leadership, a master's degree in sustainability leadership studies * Master of Science in Leadership, a master's degree in leadership studies * Master of Studies in Law, a master's degree for students who wish to study the law but do not want to become attorneys * Master of Studies in Law, Master of Science of Law, a master's degree for students who wish to study the law but do not want to become attorneys

Business

* Medical science liaison, a healthcare consulting professional * Manning Selvage & Lee, now MSLGROUP, public relations firm, part of Publicis Groupe

Organizations

* RoboCup Middle Size League, robot soccer competition * MBCGame StarCraft League, StarCraft tournament in Korea * Milwaukee School of Languages, in Wisconsin, US * Microscopical Society of London, original incarnation of the Royal Microscopical Society

Places

* Marshall railway station, Victoria, Australia, station code * Northwest Alabama Regional Airport, US, IATA code

Science and technology

* Mars Science Laboratory, a NASA mission which landed rover ''Curiosity'' * Master Subsidy Lock, a type of cell phone SIM lock used by U.S. CDMA carriers * Materials Science Laboratory, an ESA payload on ISS * Mean sea level * Metal Shading Language, used for Apple's Metal (API), Metal graphics API * Microgravity Science Laboratory, first flown on STS-83#Mission highlights, STS-83 * Maximum segment lifetime of TCP segment in networking * Midsternal line, an imaginary plane running through the median section of a sternum * mIRC scripting language (abbreviated as mSL), a scripting language embedded in mIRC, an IRC client, used for automation of actions (usually for bots) and customization of the client * Mission and Spacecraft Library, a website that tracks satellites * Moisture sensitivity level, for semiconductor handling * Multilayer soft lithography, a fabrication process * Multiple single-level, computer security systems

Sign languages

* Macedonian Sign Language, the sign language of the deaf community in Macedonia * Malagasy Sign Language, a sign language used for communication among hearing impaired people in Madagascar * Maritime Sign Language, a sign language descended from British Sign Language * Mongolian Sign Language, a sign language used in Mongolia * Moroccan Sign Language, a sign language of the deaf community of Tetouan and some other cities of Morocco

Sports

* Malaysia Super League, a top-tier football league in Malaysia * Major Series Lacrosse, a Senior A box lacrosse league in Canada * Major Soccer League, an indoor soccer league in the United States from 1978 to 1992 * ''Memphis Sport Live'', radio show, Tennessee, US * Mzansi Super League, a cricket tournament in South Africa {{disambiguation