| Acronym | Meaning |
| GTCP | Global Tropospheric Chemistry Program |
| CAQ | Computer Aided Quality Assurance |
| SS-CCSD | State Selective-CCSD |
| RATM | Renormalized Average T-matrix (for D.-of-states Calcns.) |
| CRT | Continuously Regeneration Trap |
| TAMS | Toxic Air Monitoring System (US EPA) |
| ESA | Electrokinetic Sonic Amplitude |
| PT2F | Second-order Perturbation Theory (with) Fock (matrix) |
| IMF | Initial Mass Function |
| LSE | Liquid/solid Extraction |