NISO
| Acronym | Definition |
|---|---|
| NISO | National Information Standards Organization |
| NISO | National Irish Safety Organisation |
| NISO | Northwest Iowa Symphony Orchestra (Sioux Center, IA) |
| NISO | Netherlands Industrial Space Organization |
| NISO | New International Student Orientation (Western Illinois University; Moline, IL) |
| NISO | Naval Investigative Service Office |