| Acronym | Meaning |
 | RARBI | Radar Altimeter Beacon Interface |
| RAST | Recovery Assistant Secure And Traverse System |
| RAT | Reliability Assessment Testtmtram Air Turbine |
| RATCF | Radar Air Traffic Control Facility |
| RAWS | Radar Altimeter Warning System |
| RBL | Right Butt Line |
| RC | Recoverability Code |
| RCC | Report Control Code |
| RCCB | Remote Controled Circuit Breaker |
| RCCO | Reverse Current Cut Out |
| RCM | Reliability Centered Maintenance |
| RCS | Radar Cross Section |
| RCV | Receive |
| RDBMS | Relational Data Base Management System |
| RDGT | Reliability Development Growth Test |
| RDR | Radar |
| RDR CTRL | Radar Control |
| RDSS | Rapidly Deployable Surveillance System |
| RDT | Reliability Development Test |
| RDT&E | Research, Development, Test And Evaluation |
| RDT&EN | Research, Development, Test And Evaluation, Navy |
| RDVT | Reliability Design Verification Test |
| RDY | Ready |
| REA | Request For Equitable Adjustment |
| READS | Requirements Entry Allocation Decomposition System |
| REC | Receiver |
| REC | Record |
| RECIRC | Recirculating |
| RECO | Remote Command And Control |
| REF | Reference |
| REILS | Runway End Identifier Light System |
| REJ | Reject |
| REL | Release |
| REM | Remote |
| REPLANT | Naval Training Sysyems Center Representative Atlantic |
| REPPAC | Naval Training Systems Center Representative Pacific |
| REQ | Required |
| REQD | Required |
| RESOLV | Resolver |
| RET | Retract |
| RF | Radio Frequency |
| RFD/W | Request For Deviation/waver |
| RFI | Radio Frequency Interference |
| RFI | Ready For Issue |
| RFI | Request For Information |
| RFP | Request For Proposal |
| RFQ | Request For Quotation |
| RFREQ | Receive Frequency |
| RFSS | Radio Frequency Switching System |
| RFT | Ready For Training (operational Milestone) |
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