BSL may refer to:

Business

*Boyne Island aluminium smelter, Boyne Smelters Limited, an Australian-based aluminium smelter company *Black Star Line, a former shipping line owned by Marcus Garvey *Brookdale Senior Living, a U.S. company that operates senior residences *BlueScope Steel Limited, an Australian-based flat product steel producer

Education

*Bachelor of Science in Law, an academic degree *The British School of Lome, a school in Togo, West Africa *Transport Phenomena (book), ''Transport Phenomena'' (book), an engineering textbook also known by its authors' initials (Bird, Stewart, and Lightfoot) *Bangladesh Student League, Bangladesh Chhatra League, a students' political organisation in Bangladesh

Linguistics

* *British Sign Language *Bhutanese Sign Language

Science and computing

*Biosafety level, also referred to as Biohazard Safety Level *Boost Software License, a license popular for C++ projects *The ''Bulletin of Symbolic Logic'' from the Association for Symbolic Logic *Bootstrap loader, the full term for the software involved in booting a computer

Sports

*Basketball Super League (Turkish: ''Basketbol Süper Ligi''), Turkey's premier men's basketball league *Israeli Basketball Super League, a former name of Israel's premier men's basketball league, now the Israeli Basketball Premier League *Bafakhy Super League

Transportation

*EuroAirport Basel Mulhouse Freiburg, by IATA airport code *Broad Street Line, a subway line in Philadelphia, Pennsylvania

Other uses

*Biologic Space Laboratories, the location of the ''Metroid Fusion'' video game *Beam Stage Loader, a machine that forms part of a longwall mine *Blood sugar level * Breed-specific legislation, a law to prohibit or restrict the keeping of particular types of dog {{disambig