| Acronym | Meaning |
| GDF | Generalized Density-functional (theory) |
| PIMA | Polyisocyanurate Insulation Manufacturers Association |
| SCPM | Scanning Chemical Potential Microscopy |
| CPAP | Continuous Positive Airway Pressure |
| HRSG | Heat Recovery Steam Generator |
| PSTC | Pressure Sensitive Tape Council |
| CREG | Cross-reactive Group |
| ECE | Electrical Conductivity Of Saturation Extract (soils) |
| SRCI | Single-reference Configuration Interaction |
| PAC | Polyaluminum Chloride |