| Acronym | Meaning |
| SSME | Space Shuttle Main Engine |
| NZRPA | Normalized Zero-range Potential Approxn. |
| ROHF | Restricted Open-shell Hartree-Fock |
| PASPE | Photochemically Accumulated Stimulated Photon Echo |
| VSQG | Very Small Quantity Generator |
| LHD | Lower Hybrid Drift |
| RCM | Ring-closing Metathesis |
| ID | Isotope Dilution |
| AMAD | Activity Median Aerodynamic Diameter |
| LSM | Loop Sampling Mode |