| Acronym | Meaning |
| RILS | Regulatory Interpretation Letters |
| HAO | Hybrid Atomic Orbital |
| LDFT | Local Density-functional Theory |
| ZID | Zone Of Initial Dilution |
| ODC | Orientation Distribution Coeffs. |
| PCD | Programmed Cell Death |
| SHIV | Simian-human Immunodeficiency Virus |
| ZEKE | Zero Electron Kinetic Energy |
| MRLCC | Multireference Linearized Coupled Cluster |
| TPPE | Two-photon Photoemission |