CWI
- American Welding Society
- CWI (encoding)
- Care for the Wild International
- Chicago and Western Indiana Railroad
- Children's Welfare Institute
- Christian Witness to Israel
- Civil War Institute at Gettysburg College
- Cloverway Inc.
- Cold War
- Cold War II
- College of Western Idaho
- Committee for a Workers' International (1974)
- Committee for a Workers' International (2019)
- Communist Workers' International
- Cricket West Indies
- International Socialist Alternative