| Acronym | Meaning |
| PTA | Plasma Transferred Arc |
| NIWG | National Interagency Work Group |
| CSF | Configuration Spin Function (a Wave Function) |
| RANTES | Regulated On Activation Normal T Cell Expressed And Secreted |
| GEXRF | Grazing-emission X-ray Fluorescence |
| AHW | Atomic Hydrogen Welding |
| EXEFS | Extended X-ray Emission Fine Structure |
| SSL | Spent Sulfite Liquor |
| PLDMR | Photoluminescence Detected Magnetic Resonance |
| ASHRAE | American Society Of Heating |