| Acronym | Meaning |
| EQS | Environmental Quality Standard |
| PTC | Phase Transfer Catalysis |
| ORPP | Optimized Relativistic Pseudopotential |
| LCPH | Localized Chemical Pseudopotential Hamiltonian |
| POLINAT | Pollution From Aircraft Emissions In The North Atlantic Flight Corridor |
| SCADA | Supervisory Control And Data Acquisition |
| RODAC | Regional Ocean Dumping Advisory Committee |
| UNECE | United Nations Economic Commission For Europe |
| CEPA-2V | Coupled-electron-pair Approxn. (with) Variational (method) |
| ECIP | Energy Conservation Investment Program |