IAP
IAP is the abbreviation of:
- Inhibitor of apoptosis, apoptosis inhibitor
- International Academy of Philosophy in Liechtenstein
- Unstable angina pectoris
- Fraunhofer Institute for Applied Polymer Research
- Leibniz - Institute of Atmospheric Physics
- Instrument Approach Procedure, dt instrument approach procedure, see instrument landing system
- Index of Air Purity, Index to air purity on the basis of lichen mapping
- Inter-Academy Panel, International Association of Academies of Sciences
- Disambiguation
- Abbreviation