| Acronym | Meaning |
| MDC | Minimum Detectable Concentration |
| IRMM | Institute For Reference Materials And Measurements |
| CERPIES | Collision Energy Resolved Penning Ionization Electron Spectra |
| FRC | Federal Records Center |
| UNO-CAS | Unrestricted Natural Orbital-complete Active Space |
| LCLS | Linac Coherent Light Source |
| CNC | Condensation Nucleus Counter |
| SSMBE | Solid Source Molecular Beam Epitaxy |
| LIS | Lightning Imaging Sensor |
| FML | Flexible Membrane Liner |