| Acronym | Definition |
|---|
| ISUP➣Inflatable Stand Up Paddle Board (various companies) |
| ISUP➣ISDN User Part |
| ISUP➣Institut de Statistiques de l'Université de Paris (French: University of Paris Institute of Statistics; est. 1922; Paris, France) |
| ISUP➣Integrated Services User Part |
| ISUP➣International Society of Urological Pathology |
| ISUP➣International Summer University Program (various locations) |
| ISUP➣International Symposium on Unconventional Plasmas |