| Acronym | Meaning |
| ITC | Interagency Testing Committee (TSCA) |
| CMF | Clay Minerals File (of Digitized X-ray Diffraction Traces) |
| PRS | Perturbed Rotational State (method For Ion-mol. Collisions) |
| STS | Sequence-tagged Site |
| LMW | Low Molecular Weight |
| ICOH | International Commission On Occupational Health |
| STE | Septic Tank Effluent |
| ASRG | Analytical Spectroscopy Research Group |
| IPA | Independent-particle Approximation (in Quantum Calcns. On Solids) |
| EOR | Enhanced Oil Recovery |