| Acronym | Meaning |
| MCS | Media Cleanup Standard |
| ESAA | Earth Science Advanced Aircraft |
| PSID | Photon Stimulated Ion Desorption |
| OP | Overlap Population |
| FPI | Fourier Path Integral |
| WAMMAS | Waste Minimization Management Advisory System |
| ABC | Absorbing Boundary Condition (green Function) |
| NOET | NASA Operational Environment Team |
| NDOL(ND0-L) | Neglect Of Differential Overlap-azimutal Quantum Number (of Valence Ao's) |
| NDSL | Non-Domestic Substances List |