BSL may refer to:

Business

  • 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

Linguistics

  • British Sign Language
  • Bhutanese Sign Language
  • Brazilian Sign Language
  • Bulgarian Sign Language

Publications

  • , an academic journal published by the Société de Linguistique de Paris
  • Bulletin of Symbolic Logic, from the Association for Symbolic Logic
  • Transport Phenomena (book), an engineering textbook also known by its authors' initials (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 (Turkish: Basketbol Süper Ligi), Turkey's premier men's basketball league
  • Basketball Super League (North America), North American basketball league
  • Israeli Basketball Super League, a former name of the Israeli Basketball Premier League
  • Brunei Super League, association football league in Brunei
  • Bangladesh Super League, professional football league in Bangladesh

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