| Acronym | Meaning |
| SDPA | 4,4'-sulfonyldiphthalic Anhydride |
| CAFE | Corporate Average Fuel Economy |
| GITXRF | Glancing Incidence And Takeoff X-ray Fluorescence |
| PSB | Photosynthetic Bacteria |
| HSF | Hiller-Sucher-Feinberg (equation For Calcn. Of Spin Densities And Charge Densities In Mols.) |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| IDD | Insulin-dependent Diabetes |
| PCT | Patent Cooperation Treaty |
| DWM | Distorted Wave Method |
| SIS | Stepwise Isothermal Segregation |