| Acronym | Meaning |
| HED | Howardite-eucrite-diogenite (suite Of Achondrite Meteorites) |
| NMMAPS II | The National Morbidity |
| PIAMS | Photoionization Aerosol Mass Spectrometry |
| FOSFA | Federation Of Oils |
| CERES | Crop Estimation Through Resource And Environment Synthesis Model |
| OA | Office Of The Administrator |
| DIG | Diffuse Ionized Gas |
| GHF | Generalized Hellmann-Feynman (theorem) |
| BTX | Botulinum Toxin |
| MNDO/H | MNDO For H-bonded Systems |