| Acronym | Meaning |
| MSHA | Mine Safety And Health Administration (US) |
| RWA | Rotating Wave Approximation |
| ESIX | Electrically Switched Ion Exchange |
| PIMA | Polyisocyanurate Insulation Manufacturers Association |
| BS | Backscattering Spectroscopy |
| TOA | Thermooptical Analysis |
| GTN | Global Trend Network |
| CEPPO | Chemical Emergency Preparedness And Prevention Office |
| LRM | Laboratory Reference Material |
| HRSG | Heat Recovery Steam Generator |