RIWS
| Acronym | Definition |
|---|---|
| RIWS | Rhode Island Watercolor Society (Pawtucket, RI) |
| RIWS | Runway Incursion Warning System (aviation) |
| RIWS | Racal Instruments Wireless Solutions (now Aeroflex; UK) |
| RIWS | Rockford Industrial Welding Supply (various locations) |
| RIWS | Rhode Island Wellness Society |