ICSU
| Acronym | Definition |
|---|---|
| ICSU | International Council for Science |
| ICSU | International Council of Scientific Unions (also seen as CIUC) |
| ICSU | Integrated Combat Systems University (martial arts; Victorville, CA) |
| ICSU | Integrated Channel Service Unit |
| ICSU | Integrated Commissioning and Start Up (oil exploration) |
| ICSU | Idaho Commons and Student Union (University of Idaho; Moscow, ID) |
| ICSU | Internal Channel Service Unit |
| ICSU | Interactive Compilation System Upgrade |