| Acronym | Meaning |
| IDF | International Dairy Federation |
| IPES | Inverse Photoemission Spectroscopy |
| HPCPC | High Performance Centrifugal Partition Chromatography |
| FI | Field Ionization |
| NMHC | Nonmethane Hydrocarbons |
| IUPAP | International Union Of Pure And Applied Physics |
| ASSP | Aerosol Scattering Spectrometer Probe |
| KIPO | Korean Intellectual Property Office |
| MPR | Magnetic Permeability Resonance |
| WDA | Weighted-density Approxn. (within D. Functional Formalism) |