| Acronym | Meaning |
| NEA | Negative Electron Affinity |
| CBS | Complete Basis Set |
| JJT | Josephson Junction Transistor |
| ERL | Environmental Research Laboratory |
| ARXAS | Angle-resolved X-ray Absorption |
| DOUBTFUL | Double Quantum Transitions For Finding Unresolved Lines |
| MCCEM | Multi-chamber Concentration And Exposure Model |
| HRV | Heart Rate Variability |
| AIR RISC | Air Risk Information Support Center |
| CA | Corrective Action |