| 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 |