| Acronym | Meaning |
| PQL | Practical Quantitation Levels (of Pollutants |
| SLD | Superluminescent Diode |
| EDC | Electron Energy Distribution Curve |
| PIPECO | Photoion-photoelectron Coincidence Spectroscopy |
| ACCDPPA | Approx. Coupled Cluster With Double Excitations Polarization Propagator Approxn. |
| SAIC | Science Applications International Corporation |
| LEGO | Lean Exhaust Gas Oxygen Sensor |
| NRC | National Research Council |
| NDTT | Nil Ductility Transition Temperature |
| CNDO/SW | Complete Neglect Of Differential Overlap / Sichel-Whitehead |