BL
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), basic fuzzy logic
 - BL register, the low byte of an X86 16-bit BX register
 - 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.
 - Breech-loading weapon, designated BL in British artillery
 - One of the 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 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