| Acronym | Definition |
|---|
| RBU | Riksförbundet för Rörelsehindrade Barn Och Ungdomar (Swedish National Association for Disabled Children and Young People) |
| RBU | Regional Business Unit |
| RBU | Rock Band Unplugged (video game) |
| RBU | Référentiel de Bon Usage (French: Repository of Good Use; healthcare) |
| RBU | Rukun Budi Utama (The Hague, The Netherlands) |
| RBU | Rear Body Unit |
| RBU | Reference Base Units (International Commission for Uniform Methods of Sugar Analysis) |
| RBU | Rechnungsbegleitende Unterlagen (German) |
| RBU | Remote BIOS (Basic Input/Output System) Update (computing) |
| RBU | Rehabilitation Bedservice Unit |