| Acronym | Meaning |
| EMEP | European Monitoring And Evaluation Program |
| SMP | Submitochondrial Particle |
| IRGCHAZ | Intercritically Reheated Grain-coarsened Heat-affected Zone |
| ANSR | Advanced Neutron Source Reactor |
| CQED | Consortium For Quality Environmental Data |
| EAN | Effective Atomic Number |
| EKMA | Empirical Kinetic Modeling Approach (in Air Pollution) |
| BADT | Best Available Demonstrated Technology |
| LET | Light-emitting Transistor |
| NBS | National Bureau Of Standards |