| Acronym | Meaning |
| PNO | Pseudonatural Orbital |
| TFELD | Thin Film Electroluminescent Device |
| DBRA | Division Of Biometry And Risk Assessment |
| LMO | Localized Molecular Spin Orbital |
| EUV | Extreme Ultraviolet |
| CCMC-T2 | Coupled-cluster Multiconfigurational (double-excitation Method With Cluster Operator Approximated By T2) |
| BTUGA | Bonded Tableau Unitary Group Approach |
| CMT | Computed Microtomography |
| VIMOS | VIsible MultiObject Spectrograph |
| ARCS | Alternative Remedial Contracting Strategy (US EPA) |