BL
- B − L
- BL (logic)
- BL Publishing
- BL postcode area
- BL register
- Bachelor of Laws
- Backhoe loader
- Bakerloo line
- Balmer Lawrie
- Banja Luka
- Barrister
- Basel-Landschaft
- Bell Labs
- Bhutia-Lepcha
- Bill of lading
- Bitter lemon
- Black light
- Blue Line (Washington Metro)
- Body language
- Bolivia
- Booting
- Borderline lepromatous leprosy
- Boston Legal
- Boys' Latin School of Maryland
- Boys' love
- Brazil
- Brisbane Lions
- British Leyland
- British Library
- British ordnance terms
- Bud Light
- Burkitt's lymphoma
- Carl Ludwig Blume
- List of BL dramas
- Lytvyn Bloc
- Mazda3
- Pacific Airlines
- Province of Belluno
- Saint Barthélemy
- Thiele/Small
- Ы