BTI
- AirBaltic
- Bacillus thuringiensis israelensis
- Barisan Tani Indonesia
- Baron Tornado Index
- Barter Island LRRS Airport
- Because the Internet
- Before the Impact
- Beverage Testing Institute
- Bicycle Technologies International
- Boston Theological Institute
- Boyce Thompson Institute for Plant Research
- Branch Target Identification
- Branch Target Injection
- Breaking the Impasse
- British American Tobacco
- Btrieve Technologies, Inc.
- Childish Gambino
- Joyson Safety Systems