| Acronym | Meaning |
| SVP | Schwinger Variational Principle |
| 2MASS | Two Micron All-Sky Survey |
| LDEF | Long Duration Exposure Facility (for Spacecraft Material Testing) |
| ROI | Reactive Oxygen Intermediate |
| GDIM | Generalized Diatomics-in-molecules (theory) |
| CNDO/B | Complete Neglect Of Differential Overlap / Boyd |
| QGP | Quark Gluon Plasma |
| HHS | Health And Human Services Department |
| MSPO | Method Of Successive P |
| SPOS | Single-particle Optical Sensing |