| AYQ | Ayers Rock Australien, Northern Territory [Internationaler Airport Code] |
| RRIP | Rock Ridge Interchange Protocol |
| ISRM | International Society for Rock Mechanics [engl.] Lissabon, http://www.isrm.net |
| R | Ring |
| RO | Ring Out |
| RMT | Ring Management |
| CR | Cambridge Ring |
| TRR | Tip-Ring Reverse |
| BBR | Backbone Ring |
| RI | Ring In / Indicator |
| RDB | Ring Deutscher Bergingenieure e.V. |
| RDM | Ring Deutscher Makler |
| TRT | Token Ring Terminal |
| RRD | Ring-Rate Decay |
| RDS | Ring Deutscher Soldatenverbände e.V. |
| RDS | Ring Deutscher Siedler e. V. Bonn, http://www.rdsev.de |
| REM | Ring Error Monitor |
| REN | Ring Equivalence Number |
| ROP | Ring-Opening Polymerization |
| HRC | Hybrid Ring Control |
| RCM | Ring Closure Metathesis |
| RDM | Ring deutscher Makler |
| ARL | Adjusted Ring Length |
| TRR | Token Ring Repeater |
| BBR | Backbone-Ring [engl.] Mailboxstruktur im Fido-Net |
| BFR | Berliner Flug Ring |
| DRC | Diamagnetic Ring Current |
| DTR | Dedicated Token Ring |
| TRIL | Token Ring Interoperability Lab |
| Tree-ring Bull. | Tree-ring Bulletin Zeitschrift |
| RSH | Ring Systems Handbook |
| RSD | Ring System Data |
| ROM | Ring Opening Metathesis |
| RRDE | Rotating Ring Disk Electrode |
| TIC | Token Ring Interface Coupler |
| ROMP | Ring Opening Metathetic Polymerization |
| RII | Ring / Routing Information Indicator |
| ARL | Adjusted Ring Length [engl.] |
| LHRD | Lohnsteuer Hilfe-Ring Deutschland e.V. Darmstadt, http://www.lohnsteuerhilfering.de |
| MRPL | Main Ring Path Length |
| ATR | Apollo Token Ring [engl.] |
| RDAV | Ring Deutscher Au-pair Vermittler e.V. |
| RCDS | Ring Christlich-Demokratischer Studenten |
| HORD | Hierarchically Ordered Ring Description |
| TRT | Token Ring / Rotation Time / Timer |
| BLSR | Bidirectional Line Switch Ring [engl.] |
| TROLI | Token Ring Optimized Link Interface |
| HSTR | High Speed Token Ring [engl.] Normiert von IEEE 802.5 |
| Pap. Lab. Tree Ring Res. | Papers of the Laboratory of Tree Ring Research Zeitschrift |
| Tree-Ring Res. | Tree-Ring Research [hat ein eigenes Review] Zeitschrift |