RIFS
| Acronym | Definition |
|---|---|
| RIFS | Reflectometric Interference Spectroscopy |
| RIFS | Remedial Investigation & Feasability Study |
| RIFS | Reduced Interframe Spacing |
| RIFS | Rothamsted International Fellowship Scheme (UK) |
| RIFS | Roland International Freight Services (Los Angeles, CA) |
| RIFS | Regional Ionospheric Forecast and Specification |