| Acronym | Meaning |
| IEM | Independent Electron Model (for Ionization In Ion-atom Collisions) |
| PCR | Principal Component Regression |
| ORCA | Optical Resonance Cavity Analyzer |
| SKY | Spectral Karyotyping |
| OP | Overlap Population |
| SPA | Shielded-potential Approxn. (in Electronic Structure) |
| IPMA | Ion Probe Microanalysis |
| ADCC | Antibody-dependent Cellular Cytotoxicity |
| HAN | Halogenated Acetonitrile(s) |
| GDEPT | Gene-directed Enzyme Prodrug Therapy |