BCI
- BCCI (disambiguation)
- BCI Bus
- Bahria College Islamabad
- Banca Commerciale Italiana
- Banco de Crédito e Inversiones
- Bank of the Cook Islands
- Baoulé language
- Bar Council of India
- Barcaldine Airport
- Barro Colorado Island
- Barts Cancer Institute
- Bat Conservation International
- Battery Council International
- Better Cotton Initiative
- Black Crown Initiate
- Bluevale Collegiate Institute
- Boa constrictor imperator
- Bonobo Conservation Initiative
- Book Citation Index
- Brain–computer interface
- Brantford Collegiate Institute
- British Columbia Investment Management Corporation
- Broadcasting Commission of Ireland
- Brockville Collegiate Institute
- Broward Correctional Institution
- Business Continuity Institute
- Negombo
- Ohio Bureau of Criminal Investigation