| Acronym | Meaning |
| ATIR | Attenuated Total Reflectance Infrared |
| ATG | Antithymocyte Globulin |
| PBTK | Physiologically Based Toxicokinetics |
| NWIS | Nuclear Weapons Identification System |
| ACE | Atmospheric Collection Equipment |
| EAA | Environmental Assessment Association |
| RVD | Regulatory Volume Decrease |
| MCE | Multichannel Eikonal (method For Scattering Calcns.) |
| ATLAS | A Toroidal LHC Apparatus |
| APD | Antiphase Domain |