| Acronym | Meaning |
| THGF | Trigonometric Hermite Gaussian Function |
| BPD | Bronchopulmonary Dysplasia |
| PSCC | Pseudostate Close Coupling |
| LCIS | Lobular Carcinoma In Situ |
| HSD | Hyperspherical Diabatic (wave Functions) |
| RATM | Renormalized Average T-matrix (for D.-of-states Calcns.) |
| ANPP | Aboveground Net Primary Production |
| NMOC | Nonmethane Organic Compound(s) |
| SPM | Suspended Particulate Matter |
| HCN | US Historical Climatology Network |