sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Freight Operator Recognition Scheme | *** |
| Friends of Ruaha Society | *** |
| Fellow of the Operational Research Society | *** |
| Fiber Optics Reflectance Spectroscopy | *** |
| Full Optimized Reaction Space | *** |
| Foundation for Research in Social | ** |
| Office of Road Safety | ** |
| Freight Operators Recognition Scheme | ** |
| Full Online Remote Service | ** |
| Florida Organization for Relational Studies | ** |
| First Order Regression System | ** |
| Fire Occurrence Reporting System | ** |
| Field Operations Research Section | ** |
| Friends of Rising Sun | * |
| Friends of Rowledge School | * |
| Folding of Randomized Sequence | * |
| Fellow of the OR Society | * |
| Formula One Rescue Seat | * |
| Friends of the Rozmberk Society | * |
| Faint Object Red Spectrograph | * |
| Felony Offender Reporting System | * |
| For Fractional Ownership Resort | * |
| Formula One Racing Series | * |
| Friends of Ravenswood School | * |
| fiber optic rotation sensor | * |
| Friends Of Randall Schwartz | * |