| ICAO | Iinternational Civil Aviation Organisation 
| Others |
| ICAO | Industrial Claim Appeals Office
| Others |
| ICAO | Institute of Chartered Accountants of Ontario
| Others |
| ICAO | Intellectual Civil Aviation Organs
| Others |
| ICAO | Internal Carotid Artery Occlusion
| Others |
| ICAO | International Civil Aviation Organisation
| Others |
| ICAO | International Civil Aviation Organization
| Others |
| ICAO | International Civil Aviation Organizations
| Others |
| ICAO | International Civilian Aviation Organization
| Others |
| ICAO | International Concorde Airplanes Organization
| Others |
| ICAO | International Cooperative Agricultural Organisation
| Others |