| Acronym | Definition |
|---|
| NYI➣New York Islanders (NHL) |
| NYI➣New York Institute of Photography |
| NYI➣Not Yet Implemented |
| NYI➣Nazarene Youth International |
| NYI➣New York Internet Company (internet service provider; est. 1996; New York, NY) |
| NYI➣New York Initiative (citizen infrastructure group) |
| NYI➣National Youth Institute (American Red Cross) |