| Rank | Abbreviation | Meaning |
|---|
| ***** | CPWS | Community Public Water System
| |
| ***** | CPWS | Contractor Performance Work Statement
| |
| **** | CPWS | Cyber Planet Web Services
| |
| **** | CPWS | Consecutive Public Water Supplies
| |
| *** | CPWS | Canadian Parks and Wilderness Society
| |
| *** | CPWS | Centre for Plant and Water Science
| |
| *** | CPWS | Columbia Power and Water Systems
| |
| *** | CPWS | Cell Processing Work Station
| |
| *** | CPWS | Center for Prisoner of War Studies
| |
| *** | CPWS | CONTINENTAL POWER SYSTEMS, INC.
| |
| ** | CPWS | Canadian Presbyterian Web Sites
| |
| ** | CPWS | Citizens Photo Web Site
| |
| ** | CPWS | Centre for Pharmacy Workforce Studies
| |
| * | CPWS | Cockpit Pressure Warning System
| |