| Acronym | Definition |
|---|
| RRB | Railroad Retirement Board |
| RRB | Railway Recruitment Board (India) |
| RRB | Resources Review Board |
| RRB | Research Resources Board |
| RRB | Resource Recovery Board |
| RRB | Release Receive Buffer |
| RRB | Randy Rogers Band |
| RRB | Regional Rural Bank (India) |
| RRB | Ronald Reagan Building (Washington, DC) |
| RRB | Real Return Bonds |
| RRB | Radio Regulations Board |
| RRB | Railroad Business (mail) |
| RRB | Radio Rythme Bleu (French radio station; New Caledonia) |
| RRB | Requirements Review Board |
| RRB | Resource Related Billing |
| RRB | Rowdy Ruff Boys |
| RRB | Regular Reenlistment Bonus |
| RRB | Radio Russkij Berlin (German radio station) |
| RRB | Risk Review Board |
| RRB | Rigid Rocker Bottom (shoe sole) |
| RRB | Restricted Repetitive Behavior (neurobiology) |
| RRB | Regional Rural Banks, India |
| RRB | Reduced Readiness Battery |
| RRB | Ready Review Board |
| RRB | Radar Reflective Balloon |
| RRB | Reverse Routing Bit |
| RRB | Rural Regional Bank (India) |