CPL
- ALOA Security Professionals Association
- American Association of Professional Landmen
- Bibliotheca Palatina
- CPFL Energia
- CPL (programming language)
- CPL Aromas
- CPL Resources
- CPL Shield
- Calgary Public Library
- Call-Processing Language
- Cambodian Premier League
- Campus The Hague
- Canadian Premier League
- Caprolactam
- Caribbean Premier League
- Characters per line
- Chemical Physics Letters
- Chicago Public Library
- Chinese Physics Letters
- Circular polarizing filter
- Cleveland Public Library
- Coastal Plain League
- Coastal Plain League (Class D)
- Commercial pilot licence
- Common Public License
- Communist Party of Latvia
- Communist Party of Lithuania
- Communist Party of Luxembourg
- Complementary pass-transistor logic
- Contemporary Pictorial Literature
- Control Panel (Windows)
- Coquitlam Public Library
- Corporal
- Corpus Christianorum
- Cost per Lead
- Crimean Premier League
- Criminal procedure
- Current privilege level
- Cyberathlete Professional League
- Digital Cinema Package
- North American railroad signals
- PRIMOS