| Acronym | Meaning |
| WORM | Write Once Read Many |
| ICF-CI | Interacting Correlated Fragment-CI (wave Function) (see Also SA-MCSCF) |
| OUST | Office Of Underground Storage Tanks |
| MCQR | Multiconfigurational Quadratic Response |
| DID | Dipole-induced-dipole (in Mol. Polarizabilities Calcn.) |
| SCC | Self-consistent Charge Method |
| PDU | Process Development Unit |
| PHOTOSELEX | Photochemical Systematic Evolution Of Ligands By Exponential Enrichment |
| HSA | Hexanesulfonic Acid |
| PAZ | Partial Annealing Zone (fission-track) |