| Acronym | Meaning |
| PTI | Positive Thermal Ionization (for Mass Spectrometry) |
| CM | Configuration Mixing |
| VLT | Very Large Telescope |
| UEATC | European Union For Technical Agreements In Construction (French; L'Union Europeenne Pour L'Agrement Technique Dans La Construc |
| SPADE | Stratospheric Photochemistry |
| CADASIL | Cerebral Autosomal Dominant Arteriopathy With Subcortical Infarcts And Leukoencephalopathy |
| ICBN | International Code Of Botanical Nomenclature |
| BGH | Bovine Growth Hormone |
| NCS | Notification Of Compliance Status |
| ID | Isotope Dilution |