| royalism | royalisme |
| royalist | royaliste |
| royalty | membre de la famille royale |
| Royan | Royan |
| Royat | Royat |
| Royaumont Abbey | Abbaye de Royaumont |
| Royston Drenthe | Royston Drenthe |
| Roystonea | Roystonea |
| Roza Otunbayeva | Roza Otounbaïeva |
| Rozay-en-Brie | Rozay-en-Brie |
| Roztocze | Acari |
| rozzer | flic |
| Rožaje | Rožaje |
| RP | Rzeczpospolita |
| RPD | RPD |
| RPK | Kalachnikov RPK |
| RPL | RPL |
| RPM Package Manager | RPM Package Manager |
| RPO-A Shmel | Bourdon |
| RR Lyrae stars | Etoiles RR Lyrae |
| RR Lyrae variable | Variable de type RR Lyrae |
| RR Telescopii stars | Etoiles RR Telescopii |
| RRA stars | Etoile RRA |
| RRAB stars | Etoile RRAB |
| RRB stars | Etoile RRB |
| RRC stars | Etoile RRC |
| RRDtool | RRDTool |
| rRNA | ARNr |
| Rrose Sélavy | Marcel Duchamp |
| RS | RS |
| RS Canum Venaticorum stars | Etoiles RS Canum Venaticorum |
| RS Canum Venaticorum variable | Variable de type RS Canum Venaticorum |
| RS Gimnástica de Torrelavega | RS Gimnástica de Torrelavega |
| RS Settat | Renaissance de Settat |
| RSA | Rivest Shamir Adleman |
| RSA Factoring Challenge | Compétition de factorisation RSA |
| RSA number | Compétition de factorisation RSA |
| RSA Security | RSA Security |
| RSD Alcalá | Real Sociedad Deportiva Alcalá |
| RSHA | Reichssicherheitshauptamt |
| RSS | RSS |
| rsvp | R.S.V.P. |
| RT | RT |
| RTBF | Radio-Télévision belge de la Communauté française |
| Rtc | Horloge temps réel |
| RTD info | RDT info |
| RTEMS | RTEMS |
| RTFM | LLFM |
| RTL Group | RTL Group |
| RTL II | RTL II |
| RTL Klub | RTL Klub |
| RTL Television | RTL Television |
| RTL Televizija | RTL Televizija |
| RTS Index | RTS Index |
| RTV Pink | RTV Pink |
| RTVE | Radio Televisión Española |
| Rua | Ruga |
| Ruag | RUAG technology group |
| Ruaha National Park | Parc national de Ruaha |
| Ruan Lingyu | Ruan Lingyu |
| Ruanda | Rwanda |
