| Acronym | Meaning |
| GRI | Gas Research Institute |
| HAP | Hazardous Air Pollutants |
| RMTA | Rigid Muffin-tin Approxn. |
| ACE | Alternating Conditional Expectations |
| MMI | Man-machine Interface |
| AWS | American Welding Society |
| PAT | Proficiency Analytical Testing (NIOSH) |
| GLEAMS | Groundwater Loading Effects Of Agricultural Management Systems |
| EOM | Equations Of Motion Method (green's Function) |
| RAPRA | Rubber And Plastics Research Association |