| Acronym | Meaning |
| SSHF | Spin-symmetrized Hartree-Fock (wave Function) |
| SANDS | Stratospheric Aitken Nuclei Detection System |
| ANPP | Aboveground Net Primary Production |
| CFM | Chemical Force Microscopy |
| PLSR | Partial Least-squares Regression |
| PODS | Periodic Orbit Dividing Surfaces (in Potential Surface Calcn.) |
| GRNN | Generalized Regression Neural Network |
| RFD | Reference Dose |
| BAW | Bond-order Alternation Wave (mol. Orbital) |
| SPARC | Secreted Protein Acidic And Rich In Cysteine |