| RRI | Barbara, Solomon Islands 
| Others |
| RRI | R to R interval
| Others |
| RRI | Radio Relay International
| Others |
| RRI | Radio Republik Indonesia
| Others |
| RRI | Radio Romania International
| Others |
| RRI | Raman Research Institute
| Others |
| RRI | Rancho Research Institute
| Others |
| RRI | Rapid Response Investigation
| Others |
| RRI | Rapid Results Institute
| Others |
| RRI | Reach to Recovery International
| Others |
| RRI | Reading Room Index
| Others |
| RRI | Real Residential Investment
| Others |
| RRI | Recognition Research Inc.
| Others |
| RRI | Recovery Research Institute
| Others |
| RRI | Reference Roughness Index
| Others |
| RRI | Refugee Relief International
| Others |
| RRI | Regional Reporting Inc
| Others |
| RRI | Regional Research Institute
| Others |
| RRI | Regulatory Reporting Interface
| Others |
| RRI | Relative Rate Index
| Others |
| RRI | Relocation Resources International, Inc.
| Others |
| RRI | Renal Research Institute
| Others |
| RRI | Renal Resistive Index
| Others |
| RRI | Renal Risk Index
| Others |
| RRI | Rendezvous Radar Indicator
| Others |
| RRI | replacement ratio in
| Others |
| RRI | Report to report Interphase
| Others |
| RRI | Research on Research Integrity
| Others |
| RRI | Residential Remodeling Index
| Others |
| RRI | Resource Renewal Institute
| Others |
| RRI | Response Resource Inventory
| Others |
| RRI | Response to Request for Information
| Others |
| RRI | Responsible Research and Innovation
| Others |
| RRI | Reverse Route Injection
| Others |
| RRI | Rights and Resources Initiative
| Others |
| RRI | Risk Return Index
| Others |
| RRI | Riverside Rehabilitation Institute
| Others |
| RRI | Riverside Resources Inc
| Others |
| RRI | Road Risk Index
| Others |
| RRI | Route Relay Interlocking
| Others |
| RRI | Rowett Research Institute
| Others |
| RRI | Royal Rangers International
| Others |
| RRI | Rubber Research Institute
| Others |
| RRI | Rusted Rainbow, Inc.
| Others |