| Acronym | Meaning |
| BESB | Biological Environmental Specimen Banking |
| PDI | Polydispersity Index |
| PWTF | Plane-wave Translation Factors (in Atom-ion Inelastic Collisions) |
| ALAPO | Association Of Local Air Pollution Control Officers |
| STIS | Space Telescope Imaging Spectrograph |
| YOS | Yttrium Orthosilicate |
| RDA | Recommended Daily Allowance |
| ROMP | Ring-opening Metathesis Polymerization |
| MCCP | Mountain Cloud Chemistry Program |
| ERS | External Reflection Spectroscopy |