| Acronym | Meaning |
| IAB | Information Access Branch |
| AAV | Adeno-associated Virus |
| TDO | Truncated Diatomic Orbital (a MO) |
| CMF | Colloid Metal Film |
| PEOE | Partial Equalization Of Orbital Electronegativity (model) |
| LSM | Laser Scanning Microscopy |
| RAA | Rigid-atom Approxn. (in Electronic Structure Calcns.) |
| HMS | High-manganese Silicide (semiconductor Thermoelectric Material) |
| UKMO | United Kingdom Meteorological Office |
| TTO | Transient Tracers In The Ocean |