| Acronym | Meaning |
| ODF | Orientation Distribution Function |
| OPO | Optical Parametric Oscillator |
| PVD | Physical Vapor Deposition |
| FREEON | Spin-free Orbital |
| RDF | Radial Distribution Function |
| SCTB | Self-consistent Tight-binding (in Electronic Structure) |
| BAER | Brainstem Auditory Evoked Response |
| ASB | Ambient Stds. Branch [of The US EPA] |
| SCF2 | Two-electron Self-consistent Field |
| CB1 | Corrected First Born (perturbation Theory In Atom-ion Collisions) |