| Acronym | Meaning |
| OEMTB | One-electron Mol. Tight-binding (for Electronic Structure) |
| FIDA | Fluorescence Intensity Distribution Analysis |
| AAL | Acceptable Ambient Level(s) |
| GRID | Global Resources Information Database |
| XHV | Extremely High Vacuum |
| HHMI | Howard Hughes Medical Institute |
| ACTS | Asbestos Contractor Tracking System |
| URT | Upper Respiratory Tract |
| PA | Preliminary Assessment |
| AAPG | American Association Of Petroleum Geologists |