| Acronym | Meaning |
| PTEF | Photochem. Thermodynamic Efficiency Factor |
| CDHR | Center For Devices And Radiological Health |
| AAFEGE | Asymptotically Adjusted Free-electron-gas Exchange (potential) |
| ACPF | Averaged Coupled Pair Functional |
| SCALE | Symmetrically Configured AC Light Emitting [device] |
| OLPA | Orbital Local Plasma Approxn. (in Stopping Power Calcn. For Ions By Films) |
| PGSE | Pulsed Gradient Spin Echo |
| STAD | Simple Town Air Dispersion Model (of Air Pollution) |
| DEMA | Diesel Engine Manufacturers Association |
| RPC | Rotation Planar Chromatography |