| Acronym | Definition |
|---|
| RFO | Range Forest Officer (India) |
| RFO | Ready for Occupancy |
| RFO | Refueling Outage (nuclear power) |
| RFO | Réseau France Outre-Mer (French: French Overseas Network) |
| RFO | Request for Offer |
| RFO | Republicans for Obama |
| RFO | Rising Force Online (massive multiplayer online game) |
| RFO | Robert Ferguson Observatory (California) |
| RFO | Residual Fuel Oil |
| RFO | Regularly Funded Organisation (UK) |
| RFO | Reason For Outage |
| RFO | Request For Orders |
| RFO | Radio France Outremer (French: Overseas France Radio) |
| RFO | Recovery Field Office (USACE) |
| RFO | Recycled Fuel Oil |
| RFO | River Flood Outlook (various organizations) |
| RFO | Retained Foreign Object (healthcare) |
| RFO | Ready for Operations |
| RFO | Responsible Finance Officer (UK) |
| RFO | Regional Field Office (USACE) |
| RFO | Residual Frequency Offset |
| RFO | Restrictive Flow Orifice |
| RFO | Radio Flash Online |
| RFO | Reading Festival Online |
| RFO | Risk Factor Obesity (weight management program; University of California, Los Angeles) |
| RFO | Responsible Federal Official |
| RFO | Right Foot Only (dance game) |
| RFO | Request for Observation |
| RFO | Right Forward Outside Edge (ice skates) |
| RFO | Radio Frequency Oscillator |
| RFO | Remote Foreign Office |
| RFO | Reconfigurable Fusion Objects |
| RFO | Reserve Force Officer |
| RFO | Runners Feeding Others (Ohio) |
| RFO | Rocky Flats (Operations) Office (Department Of Energy) |
| RFO | Relative Frequency Offset |
| RFO | Refined Furnace Oil |
| RFO | Request for Outsourcing |
| RFO | Richard Friis-Olsen (UK medical supplies company) |
| RFO | Relief Flight Officer |
| RFO | Revue des Facultés Catholiques de l'Ouest |