| Acronym | Meaning |
| GAPT | Generalized Atomic Polar Tensor |
| IEP | Isoelectric Point |
| VRPA | Variational Random Phase Approxn. |
| UCCD | (spin) Unrestricted Coupled Cluster (with) Double (excitations) |
| LIF | Leukemia Inhibitory Factor |
| MCHC | Mean Corpuscular Hemoglobin Concentration (occupational Exposure) |
| RHC | Rubber Hydrocarbon Content |
| NREL | National Renewable Energy Laboratory (formerly SERI) |
| CCOSM | Chemistry And Circulation Occultation Spectroscopy Mission |
| HBGF | Heparin-binding Growth Factor |