| Acronym | Meaning |
| PVOH | Polyvinyl Alcohol |
| MAS | Magic Angle Spinning (solid State NMR) |
| LASCS | Light-activated Silicon Controlled Switch |
| VESCF | Variable Electronegativity Self-consistent Field |
| SPPA | Self-consistent Polarization Propagator Approximation |
| BEEM | Ballistic Electron Emission Microscopy |
| BOC | Bond-order Conservation (model In Calcns. On Reactions) |
| ESAA | Earth Science Advanced Aircraft |
| HMM | Heavy Meromyosin |
| ICF-CI | Interacting Correlated Fragment-CI (wave Function) (see Also SA-MCSCF) |