| Acronym | Meaning |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| PA | Preliminary Assessment |
| APC | Air Pollution Control |
| BBIC | Bioluminescent Bioreporter Integrated Circuits |
| STODI | Slater-type Orbital-point Dipole Interaction (in Mol. Polarizability Calcns.) |
| SF-PNM | Step Function Perturbative Numerical Method |
| TBM | Tight Binding Model |
| SRCCSDT | Single-reference Coupled-cluster (with) Single (and) Double (and) Triple (excitations) |
| SUPERDARN | Super Dual Auroral Radar Network |
| SCTB | Self-consistent Tight-binding (in Electronic Structure) |