CASC
- CADE ATP System Competition
- California Association of Student Councils
- Cambodian Acid Survivors Charity
- Canadian Army Service Corps
- Canadian Automobile Sport Clubs
- Cardington Artificial Slalom Course
- Carl Albert State College
- Cask (disambiguation)
- Casque (disambiguation)
- Centre for Advanced Structural Ceramics
- Certificate Authority Security Council
- China Aerospace Science and Technology Corporation
- China Aviation Supplies Holding Company
- Community amateur sports club
- Corps Area Service Command
- KASC (disambiguation)
- Kask (disambiguation)