| Acronym | Meaning |
| DMC | Dynamic Matrix Control |
| LCMO | Linear Combination Of Molecular Orbitals |
| E-2PH-TDA | Extended Two-particle-hole Tamm-Dancoff Approxn. (green-function Method For Ionization-energy Calcns.) |
| MUDPIT | Multidimensional Protein Identification Technology |
| HEB | High Efficiency Boiler |
| HPHF | Half-projected Hartree-Fock Model |
| RCS | Recoupled Centrifugal Sudden (approxn. |
| ORPP | Optimized Relativistic Pseudopotential |
| BHET | Bis(2-hydroxyethyl) Terephthalate |
| INIS | International Nuclear Information System |