| Acronym | Meaning |
 | IFEOS | International Forum On Earth Observations Using Space Station Elements |
| IFIAS | International Federation Of Institutes For Advanced Study |
| IFLOWS | Integrated Flood Observing And Warning System |
| IFOV | Instantaneous Field Of View |
| IFR | Instrument Flight Rules |
| IFREMER | Institut Francais Re'checche Pour L'Exploitation De La Mer |
| IFYGL | International Field Year For The Great Lakes |
| IGAC | International Global Atmospheric Chemistry |
| IGACP | International Global Atmospheric Chemistry Program |
| IGB | International Geophysical Bulletin |
| IGB | International Geophysical Bulletin |
| IGBP | International Geosphere-Biosphere Program |
| IGC | International Geophysical Cooperation |
| IGE | International Group Elements |
| IGFA | Intergovernmental Funding Agency |
| IGOSS | Integrated Global Ocean Station System |
| IGPO | International GEWEX Program Office |
| IGPP | Institute Of Geophysics And Planetary Physics |
| IGU | International Geographical Union |
| IGW | Internal Gravity Waves |
| IGY | International Geophysical Year |
| IHOP | International H2O Project |
| IHOP 2002 | International H2O Project 2002 |
| IIASA | International Institute For Applied Systems Analysis |
| IIOE | International Indian Ocean Expedition |
| IIPS | Interactive Information And Processing Systems [for Meteorology |
| IIT | Illinois Institute Of Technology |
| IITA | Information Infrastructure Technology And Applications |
| IIV&V | Independent Integration |
| IIWG | International Investigator Working Group |
| ILEC | International Lake Environment Committee |
| ILI | Instrumentation And Laboratory Improvement |
| ILP | International Lithosphere Programme |
| ILS | Instrument Landing System |
| ILSS | Integrated Logistics Support System |
| IMAGE | N/A |
| IMAGE | Institute For Mathematics Applied To The Geosciences |
| IMAGES | Intermediate Model For The Annual And Global Evolution Of Species |
| IMAGES | Intermediate Model For The Annual And Global Evolution Of Interactive Systems |
| IMAGES | Intermediate Model Of Global Evaluation Of Species |
| IMC | International Meteorological Center |
| IMD | Indian Meteorology Department |
| IMEP | International Meteorological Educational Program |
| IMF | Interplanetary Magnetic Field |
| IMOS | Inadvertent Modification Of The Stratosphere |
| IMP | Interface Message Processor ARPANET |
| IMP | Interplanetary Monitoring Platform |
| IMPROVE II | Improvement Of Cloud & Precipitation Physics In Mesoscale Models ? 2nd Generation |
| IMS | International Magnetospheric Study |
| IMS | Information Management Service |
Browse by Letter:
