| Acronym | Meaning |
| RFW | Request For Waiver |
| RGBIT | Rigging Built-in Test |
| RGNRQR | Ignition Request Right Engine |
| RGT | Right |
| RH | Relative Humidity |
| RIC | Resource Implementation Cooperative |
| RIC | Repairable Items Conference |
| RIG | Reuse Library Interoperability Group |
| RIL | Repairable Items List |
| RILSD | Resident Integrated Logistics Support Detachment |
| RIU | Radar Interface Unit |
| RJAG | Reuse Joint Activities Group |
| RLF | Reusability Library Framework |
| RLMS | Radar Landmass Simulator |
| RM | Replaceable Module |
| RMNG | Remaining |
| RMP | Risk Management Plan |
| RMR | Remote Map Reader |
| RMS | Root-mean-square |
| RNAV | Radar Navigation |
| RNCC | Reference Number Category Code |
| RNG | Range |
| RNS | Radar Navigation Set |
| RNTDS | Restructured Navy Tactical Data System |
| RNVC | Reference Number Variation Code |
| ROAMS | Reusable Object Access Management System |
| ROCD | Reuse Operational Concept Document |
| ROE | Rules Of Engagement |
| ROF | Receipt Of Funds |
| ROI | Return On Investment |
| ROM | Read Only Memory |
| ROM | Rough Order Of Magnitude |
| ROR | Repair Of Repairables |
| RPC | Remote Procedure Call |
| RPIE | Real Property Installed Equipment |
| RPM | Revolutions Per Minute |
| RPU | Rotor Phasing Unit |
| RR | Rejection Report |
| RRR | Requirements Rational Report |
| RSQ | Rescue |
| RSR | Repair Survival Rate |
| RST | Reset |
| RSVR | Reservoir |
| RT | Receiver Transmitter |
| RT | Remote Terminal |
| RTA | Receiver-transmitter Antenna |
| RTB | Remote Test Basetmtreturn To Base |
| RTC | Recruit Training Command |
| RTN | Return |
| RTP | Request For Technical Proposal |