BL (or similar) may refer to:

Arts and entertainment

* Boys' love, a Japanese term for fiction featuring romantic relationships between male characters * BL Publishing, a division of the wargames manufacturing company, Games Workshop * ''Boston Legal'', a US legal comedy-drama

Businesses and organizations

* Balmer Lawrie, an Indian central public sector undertaking conglomerate * Bell Labs, an audio-technology research and design enterprise * Boys' Latin School of Maryland, a US private school * Brisbane Lions, an Australian rules football team in the Australian Football League * British Library, the UK's national library * British Leyland, a former UK vehicle manufacturing company * Pacific Airlines (IATA code BL), a low-cost airline * Lytvyn Bloc, a Ukrainian political party

Food and drink

* Bitter lemon, a carbonated soft drink * Bud Light, an American lager beer

Law

* Bachelor of Laws (B.L.), an undergraduate degree in law * Barrister-at-Law, a degree and professional qualification in Ireland, Northern Ireland and Nigeria.

Places

* BL postcode area, UK, covering Bolton and Bury in Greater Manchester * Bakerloo line, a London Underground line * Banja Luka, a city in Bosnia and Herzegovina * Saint Barthélemy [ISO country code ''BL''], a Caribbean overseas collectivity of France * Basel-Landschaft (Basel-Country), a canton of Switzerland * Province of Belluno, Italy (car-license plate abbreviation ''BL'') * Bolivia (FIPS Pub 10-4 and obsolete NATO digram ''BL''), a central South American country * Brazil, LOC MARC code

Science and technology

Mathematics and computing

* BL (logic), BL (logic), basic fuzzy logic * BL register, the low byte of an X86 16-bit BX register * Booting#Modern boot loaders, Bootloader

Health and medicine

*Accupressure or acupuncture points, e.g., BL-34 or BL-54 *Burkitt's lymphoma, a disease *Borderline lepromatous leprosy, a disease

Other uses in science and technology

* B − L (B minus L), in physics * Backhoe loader, an engineering vehicle * Black light, a lamp which operates near the ultraviolet range of light * Carl Ludwig Blume, botanist, abbreviated Bl. * British ordnance terms#BL, Breech-loading weapon, designated BL in British artillery * One of the Thiele/Small#Fundamental small signal mechanical parameters, Thiele/Small electromechanical parameters of loudspeakers

Other uses

* Ы, Yery or Yeru, a letter in the Cyrillic script, which resembles lowercase B and L written together (bl) * BL, braille shorthand for blind * Bakerloo line, a London Underground line * Bill of lading, a receipt issued by a shipping carrier * ''Blessed'', an honorific prefix given to beatification, beatified Catholics * Blue Line (Washington Metro) * Body language, a form of non-verbal communication * Bhutia-Lepcha, an ethnic grouping of people for which there are reserved seats in the Sikkim Legislative Assembly, in India