| Acronym | Meaning |
| AODC | Acridine Orange Direct Count [of Bacteria] |
| EMIRA | Epidemiological And Microbial Risk Assessment |
| NDA | New Drug Application |
| DDAF | Dicretized Distributes Approximating Function (propagator |
| ESP | Exchangeable Sodium Percentage (soils) |
| RC(XI) | (fully) Correlated Relativistic Local-density |
| SNO | Spin Natural Orbital |
| QLSM | Quadratic Least-squares Method (variational For Scattering) |
| CDM | Capacitive Discharge Mode |
| MAC | Maximum Admissible Concentration |