CBI
- CB1 (disambiguation)
- CBI (AM)
- CBI (film series)
- CBI-FM
- CBIS (disambiguation)
- CBL (disambiguation)
- California Bureau of Investigation
- Cardiff Bus Interchange
- Caribbean Basin Initiative
- Center for Biomedical Imaging
- Center for the Promotion of Imports
- Central Bank of Iceland
- Central Bank of India
- Central Bank of Iran
- Central Bank of Iraq
- Central Bank of Ireland
- Central Bukidnon Institute
- Central Bureau of Investigation
- Central bank independence
- Charles Babbage Institute
- China Burma India Theater
- College Basketball Invitational
- College Bowl
- Colorado Bureau of Investigation
- Community Boating, Inc
- Computer-based interlocking
- Confederation of British Industry
- Content-based instruction
- Continuous bladder irrigation
- Cosmic Background Imager
- Immigrant investor programs
- Washington Commonwealth Federation