| Acronym | Meaning |
| AODP | Advanced Ocean Drilling Program |
| PPFD | Photosynthetic Photon Flux D. |
| PVO | Pseudovalence Orbital |
| ECNI | Electron Capture Negative Ionization |
| ASMD | Atmospheric Sciences Modeling Division (US EPA) |
| OSSE | Oriented Scintillation Spectrometer Experiment |
| CCID | Confidential Chemicals Identification System |
| CCE | Capacitative Calcium Entry |
| EDRAW | Erasable Digital Read After Write |
| ROBK1 | Relativistic First-order Oppenheimer-Brinkman-Kramers |