| Acronym | Meaning |
| PTDS | Photothermal Deflection Spectroscopy |
| GMP2 | Generalized Moeller-Plesset Second-order (perturbation Theory) |
| OA | Office Of The Administrator |
| ETD | Enhanced Trickle Down (watershed Acidification Model) |
| GVB-PP | Generalized Valence Bond-perfect Pairing (wave Function) |
| AMOS | Air Management Oversight System |
| SH3 | Src Homology 3 |
| HEA | Health And Environmental Assessment |
| CIBS | Corrections To An Incomplete Basis Set (a Perturbation Theory) |
| SWFM | Scanning Work Function Microscopy |