| Acronym | Definition |
|---|
| NIOC➣National Iranian Oil Company |
| NIOC➣Navy Information Operations Command (US Navy) |
| NIOC➣Naval Information Operations Command (US Navy) |
| NIOC➣Negril Interval Ownership Club (Negril, Jamaica) |
| NIOC➣Northern Illinois Orienteering Club |
| NIOC➣Network Inter-Operability Committee |
| NIOC➣Northern Illlinois Offshore Club |