| Acronym | Meaning |
| LTER | Long Term Ecological Research |
| OHAO | Orthogonalized Hybrid Atomic Orbital |
| ICTAC | International Confederation For Thermal Analysis And Calorimetry |
| BAER | Brainstem Auditory Evoked Response |
| SBCOD | Slowly Biodegradable Chemical Oxygen Demand |
| NRDA | Natural Resource Damage Assessment |
| FIB | Focused Ion Beam |
| APT | Atomic Polar Tensor (in Ir Spectra Calcn.) |
| HSQC | Heteronuclear Single Quantum Coherence |
| TISAB | Total Ionic Strength Adjustment Buffer (for Fluoride) |