| Acronym | Meaning |
| HBJ | Hougen-Bunker-Johns (Hamiltonian For Mol. Calcns.) |
| AMD | Acid Mine Drainage |
| RR | Round Robin (test) |
| GEKT | Generalized Extended Koopmans Theorem |
| PPI | Prepulse Inhibition |
| ETA | Electrothermal Atomization |
| CWTI | Chemical Waste Transportation Institute |
| FSGO | Floating Spherical Gaussian Orbital |
| HTCO | High Temperature Catalytic Oxidation |
| CHCS | Chemical Hazards Communication Society |