| Acronym | Definition |
|---|
| RRO | Roles, Responsibilities and Objectives |
| RRO | Regional Registration Office (India) |
| RRO | Record Route Object |
| RRO | Regulatory Reform Order (UK Office of the Deputy Prime Minister Fire Safety) |
| RRO | Robert's Rules of Order |
| RRO | Regional Reliability Organization |
| RRO | Reproduction Rights Organisation |
| RRO | Russian Ragnarok Online (gaming) |
| RRO | Registered Roof Observer |
| RRO | Residual Range Organics |
| RRO | Rocky Road Outfitters (Utah) |
| RRO | Rahmo Rehabilitation Organisation (Somalia) |
| RRO | Radial Runout |
| RRO | Red Raider Orientation (Texas Tech University) |
| RRO | Revised Regulations of Ontario (Canada) |
| RRO | Rebirth Ragnarok Online (gaming) |
| RRO | Rappahannock River Oysters (Topping, VA) |
| RRO | Rate & Route Operator |
| RRO | Reality Rock Organization |
| RRO | Rhythmic Rotation (relaxation technique) |
| RRO | Regional Reporting Office (Hekimian) |
| RRO | Resident Representative Office |
| RRO | Rosteen Reconstruction Organization |