| Acronym | Meaning |
| PWS | Parallel Working System |
| PWS | Performance Work Statement |
| PWS | Personal Work Station |
| PWS | Phalanx Weapon System |
| PWS | Phoenix Weapon System |
| PWS | Potable Water System |
| PWS | Preliminary Work Statement |
| PWS | Prince William Sound (Alaska) |
| PWS | Private Water Supply |
| PWS | Program Work Statement |
| PWS | Programmer Work Station |
| PWS | Project Work Statement |
| PWS | Psychological Warfare Service |
| PWS | Psychological Warfare Society |
| PWS | Public Warning System (civil defense; various locations) |
| PWS | Public Water Supply |
| PWS | Public Weather Service |
| PWS | Public Works Standards (various locations) |