| Acronym | Meaning |
| RFCC | Residue Fluid Catalytic Cracking |
| EPS | Expanded Polystyrene |
| 2PPE | Two-photon Photoemission |
| PCV | Positive Crankcase Ventilation |
| GREAT-ER | Geog.-referenced Regional Exposure Assessment Tools For European Rivers |
| ATERIS | Air Toxics Exposure And Risk Information System |
| PDA | Photodiode Array |
| NCID | National Center For Infectious Diseases |
| LLT | Laser Luminescence Tomography |
| PRENFLO | PRessurized ENtrained FLOw (process) [combustion And Gasification] |