| Abbreviation | Definition |
|---|---|
| RTY | Realty |
| RU | Roses Unlimited |
| RU | Roussel Uclaf (now part of Hoechst AG) |
| RUGC | Really Useful Garden Company (Wakefield, England, UK) |
| RUH | Russell- Hampton Company |
| RUH | Russell-Hampton Company |
| RUHT | Ruapuha Uekaha Hapu Trust |
| RUI | Restaurants Unlimited, Inc. |
| RUI | Retirement Unlimited Inc |
| RUI | Retirement Unlimited, Inc. |
| RUMASA | Ruiz Mateos, S. A. |
| RUR | Really Useful Resources |
| RUSI | Ramas Uypitching Sons Inc |
| RUSNANO | RUSsian Corporation of NANOtechnologies |
| RUTH | Ricks Underwater Treasure Hunt |
| RUTH | Rick's Underwater Treasure Hunt |
| RV | Rampant Verdure |
| RVA | RARITAN VALVE & AUTOMATION, INC. |
| RVA | Raritan Valve & Automation, Incorporated |
| RVB | Red Velvet Box Studio |