| Abbreviation | Definition |
|---|---|
| RFE | Return From Exception |
| RFIO | Remote File Input/Output |
| RFmx | Radio Frequency Measurement Ex |
| RFP | Remote Field Programming |
| RFRS | Ready For Rational Software |
| RFST | Romanian Free Software Teams |
| RFV | Reduced Functionality Version |
| RGB | Rotating Graphics Base |
| RGL | Ruby Graph Library |
| RGM | Ripon Good Math |
| RGML | Requirements Generation Markup Language |
| RGPA | Real-time General Purpose Analyzer; it's a free software interface for KEOLAB'S smart card |
| RGR | Retro Game Room |
| RGS | REAL GDPR Software |
| RGS | Remote Graphics Software |
| RGSS | Ruby Game Scripting System |
| RGU | Report Generator Utility |
| RHEA | Red Hat Enhancement Advisory |
| RHEL | Red Hat Enterprise Linux |
| RHSCL | Red Hat Software Collections Library |