| Acronym | Meaning |
| APHA | American Public Health Association |
| RMBPT | Relativistic Many-body Perturbation Theory |
| AMBIENS | Atmospheric Mass Balance Of Industrially Emitted And Natural Sulfur |
| FRP | Fiber Reinforced Plastic |
| IEET | Intramolecular Electronic Energy Transfer |
| QLSM | Quadratic Least-squares Method (variational For Scattering) |
| DMCP | Double Microchannel Plate |
| TCXO | Temperature-compensated Crystal Oscillator |
| DF-OCE | Dirac-Fock One-center Expansion |
| IGC | International Geological Congress |