| Acronym | Meaning |
| SS | Split-shell (gaussian Basis Set) |
| DIET | Desorption Induced By Electronic Transitions |
| MSIS | Mass Spectrometer And Incoherent Scatter |
| ODFS | Optimized Dirac-Fock-Slater |
| BZ | 3-quinuclidinyl Benzilate (chemical Warfare Agent) |
| HIWIP | Homojunction Interfacial Work-function Internal Photoemission |
| CSDP | Continental Scientific Drilling Program |
| PSRP | Process To Significantly Reduce Pathogens (of EPA) |
| SAACGS | State Ambient Air Concentration Guidelines Or Standards |
| AWWA | American Water Works Association |