| Acronym | Meaning |
| ASFF | Aerated Stationary Or Submerged Fixed-film (wastewater Treatment) |
| FECO | Fringes Of Equal Chromatic Order |
| AIJ | Activities Implemented Jointly [related To Greenhouse Gas Control] |
| DPT | Diffuse Phase Transition |
| NSCP | North Sea Community Program |
| FIP | First Ionization Potential |
| TSD | Technical Support Document |
| APWR | Advanced Pressurized Water Reactor |
| CS | Crystal Structure |
| PACE | Pacific Atmospheric Chemistry Experiment |