| Acronym | Definition |
|---|
| OIN➣Open Invention Network |
| OIN➣Output or Input |
| OIN➣Opérations d'Intérêt National (French: Operations of National Interest) |
| OIN➣Originator's Identification Number (direct debit identification number) |
| OIN➣Outer Info Network (advertising supported software) |
| OIN➣Other Items Net |
| OIN➣Office for Immigration and Nationality (Hungary) |
| OIN➣Otaniemi International Network (Finland) |
| OIN➣Organization of Imperial Nations (Cyber Nations alliance) |
| OIN➣Orona Innovation Network (Spain) |