IFM
- Forest fire weather index
- IFM Investors
- IFM Philippines
- IFM Therapeutics
- Immunofluorescence microscopy
- Incremental funding methodology
- Independent forest monitoring
- Institut Fizik Malaysia
- Institut Français de la Mode
- Institute for Media and Communication Policy
- Institute of Fisheries Management
- Interaction-free measurement
- Intergalactic FM
- International Falcon Movement – Socialist Educational International
- International Formula Master
- Radio Mindanao Network