| RR&B | Rolls Royce and Bentley 
| Others |
| RRB | Junta de Reglamento de Radiocomunicaciones
| Others |
| RRB | Radar Range Bearing
| Others |
| RRB | Radar Reflective Balloon
| Others |
| RRB | Rade Revised Bible
| Others |
| RRB | Radio Regulations Board
| Others |
| RRB | Railroad Retirement Benefits
| Others |
| RRB | Railroad Retirement Board
| Others |
| RRB | Railroad Retirement Board's
| Others |
| RRB | Railway Recruitment Board
| Agency, Government, Railways |
| RRB | Random Raging Boners
| Others |
| RRB | Randy Rogers Band
| Others |
| RRB | Rate Reduction Bonds
| Others |
| RRB | Rational Reason to Believe
| Others |
| RRB | Readiness Review Board
| Others |
| RRB | Real Return Bonds
| Others |
| RRB | Recruitment & Retention Battalion
| Others |
| RRB | Reduced Readiness Battery
| Others |
| RRB | Regional Rural Bank
| Others |
| RRB | Regional Rural Bank of India
| Others |
| RRB | Regional Rural Banks
| Others |
| RRB | Regular Re-Enlistment Bonus
| Others |
| RRB | Reiner, Reiner, & Bendett, PC
| Others |
| RRB | Release Receive Buffer
| Others |
| RRB | Reliability Requirements Board
| Others |
| RRB | Requirements Review Board
| Others |
| RRB | Research Resources Board
| Others |
| RRB | Research Review Board
| Others |
| RRB | Resource Recovery Board
| Others |
| RRB | Resource-Related Billing
| Others |
| RRB | Resources Review Board
| Others |
| RRB | Resources Review Boards
| Others |
| RRB | Road Rally Board
| Others |
| RRB | Robert R. Blair, Attorney at Law
| Others |
| RRB | Robinson Ranger Brigade
| Others |
| RRB | Rock Rhythm N Blues Festival
| Others |
| RRB | Rolls- Royce and Bentley Garages
| Others |
| RRB | Roof Rack Bag
| Others |
| RRB | Round Rod Bayonet
| Others |
| RRB | rRNA and ribosome biosynthesis
| Others |