BSL may refer to:
Businesses Black Star Line, a former shipping line owned by Marcus Garvey BlueScope Steel Limited, Australian-based flat product steel producer Bokaro Steel Plant, a steel plant in Bokaro district, Jharkhand, India Boyne Smelters Limited, Australian-based aluminium smelter company Brookdale Senior Living, a U.S. company that operates senior residences Tata Steel BSL, formerly Bhushan Steel Limited, a defunct manufacturer of auto-grade steel in India
Education Bachelor of Science in Law, an academic degree British School of Lomé, Togo, a school in Togo, West Africa
Languages British Sign Language, United Kingdom Bhutanese Sign Language, Bhutan Brazilian Sign Language, Brazil Bulgarian Sign Language, Bulgaria
Publications , a French journal of linguistics (since 1869) Bulletin of Symbolic Logic, American journal of the Association for Symbolic Logic (since 1995) Transport Phenomena (book), a 1960 chemical engineering textbook by Bird, Stewart, and Lightfoot
Science and computing Biosafety level or biohazard safety level, a set of biocontainment precautions Blood sugar level Boost Software License, a license popular for C++ projects Bootstrap loader, the software involved in booting a computer Business Source License, a source-available software license
Sports Basketball Super League, Turkey Basketball Super League (North America) Israeli Basketball Super League Brunei Super League, a football league Bangladesh Super League, a football league
Transportation EuroAirport Basel Mulhouse Freiburg (IATA airport code) Broad Street Line, a subway line in Philadelphia, Pennsylvania, US Bhusaval Junction railway station (station code: BSL), Maharashtra, India
Other uses Bangladesh Student League, a students' political organisation in Bangladesh Biologic Space Laboratories, the location of the Metroid Fusion video game Beam stage loader, a machine that forms part of a longwall mine Breed-specific legislation, a type of law to prohibit or restrict the keeping of particular breeds or types of dog