- CBRF (Community Based Residential Facilities)
- CBRN (Chemical, biological, radiological, nuclear)
- CBRN CM (Chemical, Biological, Radiological, and Nuclear Consequence Management)
- CBRNE (Chemical, biological, radiological, nuclear and explosive)
- CBRN HAZ (Chemical, Biological, Radiological, and Nuclear Hazard)
- CBRNHE (Chemical, Biological, Radiological, Nuclear, and High-yield Explosives)
- CBRN PD (Chemical, Biological, Radiological, and Nuclear Passive Defense)
- CBRS (Concept-Based Requirements System)
- CBRT (Chemical-Biological Response Team)
- CBS (Columbia Broadcasting System)
- CBSA (Core based statistical area)
- CBSC (Central Board of Secondary Education)
- CBSE (Component Based Software Engineering)
- CBSU (Cluster-Based Sentence Utility)