| 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) |