| 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 |