IUN
| Acronym | Definition |
|---|---|
| IUN | Indiana University Northwest (Gary, IN, USA) |
| IUN | Iunius (Latin: June) |
| IUN | Intelligent Utility Network (IBM) |
| IUN | Ilmenauer Uni Nachrichten (German: Ilmenau University News) |
| IUN | Immediate Upstream Neighbor |
| IUN | International University of Nescience (Universal Church Triumphant of the Apathetic Agnostic) |