| Acronym | Meaning |
| MP2 | Moeller-Plesset Second-order Perturbation Theory |
| HEMPAS | Hereditary Erythroblastic Multinuclearity With Positive Acidified Serum Lysis Test |
| EPA | Environmental Protection Authority (Australia) |
| SHREWD | Standoff Handheld Real-time Early Warning Detector |
| BTDA | 3,3',4,4'-benzophenonetetracarboxylic Dianhydride |
| MIC | Microwave Integrated Circuit |
| MAHRSI | Middle Atmosphere High Resolution Spectrograph Investigation |
| BASF | Badische Anilin- Und Soda-Fabrik |
| CHORUS | CERN Hybrid Oscillation Research Apparatus |
| MR-CEPM | Multireference-coupled Electron Pair Method |