CBL
- CBL (gene)
- CBL-FM
- CBL-Mariner
- CBLA-FM
- Calculator-Based Laboratory
- Cambuslang railway station
- Canadian Baseball League
- Canadian Basketball League
- Cannabicyclol
- Carbon Based Lifeforms
- Carl Barks Library
- Catholic Benevolent Legion
- Celebrity Badminton League
- Cement bond log
- Central Bank of Liberia
- Central Bank of Libya
- Cerebellum
- Challenge-based learning
- Chesapeake Biological Laboratory
- Chester Beatty Library
- China Baseball League
- Citrus Belt League
- Clare Boothe Luce
- Composite Blocking List
- Computer-based learning
- Conference Basketball League
- Confidence-based learning
- Continental Baseball League
- Continental Basketball League
- Controlled buoyant lift
- Convective Boundary Layer
- Croatian Biographical Lexicon
- Cross-body lead
- Cross-border leasing
- Datacom Group
- Linux
- List of Pennsylvania railroads
- National Basketball League (China)
- Public Housing