| Acronym | Meaning |
| USRA | Universities Space Research Association |
| ARAC | Acid Rain Advisory Committee |
| DIANA | Detection Of Immobilized Amplified Nucleic Acids |
| PMDL | Practical Method Detection Limit |
| RI/FS | Remedial Investigation/feasibility Study (Superfund) |
| IRMS | Isotope Ratio Mass Spectrometry |
| APHA | American Public Health Association |
| TROESY | Transverse Rotating-frame Overhauser Effect Spectroscopy |
| ROHF | Restricted Open-shell Hartree-Fock |
| CP-TAPF | Cross-polarization Using Time-averaged Precession Frequency |