| Acronym | Meaning |
| SED | Spectral Energy Distribution |
| BMT | Bone Marrow Transplantation |
| ECCI | Electron Capture Chemical Ionization |
| FTP | US Federal Test Procedure (for Exhaust Catalysts) |
| CO | Crystal Orbital |
| NADC | Sodium Deoxycholate |
| ASMS | American Society For Mass Spectrometry |
| IBS | Incomplete Basis Set |
| DNR | Department Of Natural Resources |
| PUMP | Pure (alpha-spin-state) Unrestricted Moeller-Plesset Nth-order (wave Function) |