| Acronym | Meaning |
| PFWM | Parametric Four-wave Mixing |
| GBH | Gravel Bed Hydroponic System (for Wastewater Treatment) |
| LHASA | Logic And Heuristics Applied To Synthetic Analysis |
| CCG | Continental Collision Granitoids |
| IEG | Immediate Early Gene |
| LSDF | Local Spin Density Functional |
| MCI | Mild Cognitive Impairment |
| NCHS | National Center For Health Statistics |
| PDS | Piecewise Direct Standardization |
| ARMAX | Autoregressive Moving Average Exogenous |