| Acronym | Meaning |
| PCI-X | Parametrized Configuration Interaction (with Parameter) X |
| ACMV | African Cassava Mosaic Virus |
| LAI | Leaf Area Index |
| UKIRT | United Kingdom Infrared Telescope |
| RTT | Resonant Tunneling Transistor |
| CCOM | Coupled Channel Optical Method |
| BASF | Badische Anilin- Und Soda-Fabrik |
| FOEA | First-order Eikonal Approximation |
| CAIR | Comprehensive Assessment Information Rule (USEPA) |
| PBM | Proton Beam Micromachining |