| Acronym | Meaning |
| CCSA | Classical Cintrifugal-sudden Approxn. |
| IWSA | International Water Supply Association |
| APDI | Anisotropic Point-dipole Interaction (model For Calcg. Long-range Intermol. Dispersion Forces) |
| USACE | US Army Corp Of Engineers |
| IRES | Internal Ribosome Entry Site |
| SDA | Strand Displacement Amplification |
| OCH | Ochkur (approxn. In Electron-atom Scattering Calcns.) |
| FLASH | Fluorescent Airborne Stratospheric Hygrometer |
| CAPCA | Closure And Postclosure Activity |
| IPAN | Imaging Passive-active Neutron |