| Acronym | Meaning |
| GSAC | Generalized Symmetry Adapted Cluster (theory) |
| CELIA | Competitive Enzyme-Linked Immunoassay |
| MR-SAC | Multireference Symmetry-adapted-cluster (quantum Theory Or Wave Function For Mol. Calcns.) |
| INDO/2-AHP | INDO/2-average Hole Potential |
| TERA | Toxicology Excellence For Risk Assessment |
| IPNS | Intense Pulsed Neutron Source |
| ODPAS | Optically Detected Photoacoustic Spectroscopy |
| ISGO | International Structural Genomics Organization |
| ESTEC | European Space Research And Technology Centre |
| CPF | Coupled-pair Functional (CI Method With Energy Functional) |