ICSO
| Acronym | Definition |
|---|---|
| ICSO | International Conference on Space Optics (Toulouse, France) |
| ICSO | Imperial County Sheriff's Office (California) |
| ICSO | Imperial College Symphony Orchestra (London, UK) |
| ICSO | International Civil Society Organization |
| ICSO | International Container Security Organization (Brussels, Belgium) |
| ICSO | Installation Commercial Solicitation Officer |