| Acronym | Meaning |
| HGF | Hermite Gaussian Function |
| GC-MS | Gas Chromatography-mass Spectrometry |
| QBO | Quasi-biennial Oscillation (atm.) |
| TDD | Telecommunications Device For The Deaf |
| MQES | Metastable-quenched Electron Spectroscopy |
| CLOS | Common Lisp Object System (language) |
| ESARDA | European Safeguards Research And Development Association |
| APOMA | American Precision Optics Manufacturers Association |
| OLDA | Ordinary Linear Discriminant Analysis |
| HDP | High-density Plasma |