| 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 |