| Acronym | Meaning |
| PDA | Photodiode Array |
| AFA | Abstract Factor Anal. (statistics) |
| RCNDO/S | Rydberg CNDO/screened |
| SEGD | Surfactant-enhanced Gravity Drainage [as Of Subsurface Contaminants] |
| QUAPI | Quasiadiabatic Propagator Path Integral Method |
| CEES | Committee On Earth And Environment Sciences (US) |
| QPM | Quantum Proximity Microscopy |
| IAP | Islet-activating Protein |
| LINEAR | Lincoln Near Earth Asteroid Research |
| AOCI | Airborne Ocean Color Imager |