| Abbreviation | Definition |
|---|---|
| RRB | Radar Reflective Balloon |
| RRB | Readiness Review Board |
| RRB | Recruitment & Retention Battalion |
| RRB | Reduced Readiness Battery |
| RRB | Regular Re-Enlistment Bonus |
| RRB | Reliability Requirements Board |
| RRB | Requirements Review Board |
| RRB | Robinson Ranger Brigade |
| RRBI | Radar Range Bearing Indicator |
| RRC | Regional Reporting Center |
| RRC | Requirements Review Committee |
| RRD | Radar Range Development |
| RRD | Radio Research Detachment |
| RRD | Raw Radar Data |
| RRD | Reactor Radiation Division |
| RRD | Recurrence Rate Data |
| RRD | Reduced Resolution Data |
| RRD | Regimental Reconnaissance Detachment |
| RRD | Regional Readiness Data |
| RRD | Regular Retirement Date |