| Acronym | Meaning |
| HAD | Hollow Anode Discharge |
| PCCI | Premixed Charge Compression Ignition |
| HTGR | High-Temperature Gas Reactor |
| PCA | Polar Cap Absorption |
| USGE | Ultrathin Slab Gel Electrophoresis |
| ETI | Environmental Testing Industry |
| EPQU | IFCC Expert Panel On Quantities And Units |
| CNRF | Cold Neutron Research Facility |
| RKKR-GF | Relativistic Koringa-Kohn-Rostoker Green Function |
| DWC | Deasphalted Whole Crude |