| Acronym | Meaning |
| NPSO | Nonpaired Spatial Orbital |
| AER | Atmospheric And Environmental Research |
| DSA | Dynamic Strain Aging |
| SMG | Submandibular Gland |
| BID | Buoyancy Induced Dispersion |
| PENIS | Proton-enhanced Nuclear Induction Spectroscopy |
| FATES | FIRFA And TSCA Enforcement System (now Known As SSTS) |
| ORD | Office Of Research And Development (USEPA) |
| DMICS | Design Methods For Integrated Control Systems [propulsion] |
| FEESP | Field-emitted Electron Spin-polarization |