| Acronym | Meaning |
| QSO | Quasistellar Objects |
| HAO | Hydrogenic Atomic Orbital |
| ARIMAX | Auto Regressive Integrated Moving Average With Exogeneous Input Model |
| ARNT | Aryl Hydrocarbon Receptor Nuclear Translocator |
| BSFC | Break Specific Fuel Consumption |
| CPF | Cancer Potency Factor |
| ALMV | Alfalfa Mosaic Virus |
| RVLM | Rostral Ventrolateral Medulla |
| BOCLE | Ball-on Cylinder Lubricity Evaluator |
| QCCA | Quasiclassical Close-coupling Approximation |