Acronyms
- Bihac, a city in Bosnia and Herzegovina
- Batteries Included, a former computer software and hardware company based in the Toronto area
- Bank Indonesia, the national bank of Indonesia
- Batman Incorporated, an organization in DC comics lead by Bruce Wayne.
- Bayesian inference, in statistics
- Bear Island (disambiguation)
- Bilhete de identidade (disambiguation), the common abbreviation for the names of the national ID cards of Portugal and Mozambique
- BioShock Infinite, a 2012 first-person shooter video game
- Bishop Ireton High School, a Roman Catholic high school in Alexandria, Virginia
- Block Island, in Rhode Island
- Boehringer Ingelheim, a German pharmaceutical company
- Braniff International Airways, a now-defunct large air passenger service
- Breidbart Index, measure of severity of Usenet newsgroup spam
- British Invisibles, a British trade organisation
- Burning Index, A number relating to the potential amount of effort needed to contain a single fire in a particular fuel type within a rating area derived from the NFDRS
- Business informatics, the combined discipline of information technology and management
- Business intelligence, in information technology, the discipline of dealing and analysing business-related information
- Bedriftsøkonomisk Institutt, BI Norwegian Business School
- Rome: Total War: Barbarian Invasion, a 2005 expansion pack in the Rome: Total War computer game
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