| Acronym | Meaning |
| ETF | Extended Thomas-Fermi (model) |
| SPIRIT | Single Photon Ionization Resonance Ionization To Threshold |
| LLD | Lower Limit Of Detection |
| SXRF | Synchrotron X-ray Fluorescence |
| FERST | Facility For Environmental Remote Sensing And Test |
| STR | Short Tandem Repeat |
| ASPET | American Society For Pharmacology And Experimental Therapeutics |
| IPPP | Inner Projections (of The) Polarization Propagator (in Calcns. On Nuclear Spin Coupling) |
| PSA-CCSD | Partially Spin Adapted-CCSD |
| LSDX | Local-spin-density (with Exact) Exchange |