| Acronym | Meaning |
| ARAS | Atomic Resonance Absorption Spectroscopy |
| XEAES | X-ray Excited Auger Electron Spectroscopy |
| CIC | Consumer Information Catalog |
| HSPF | Hydrological Simulation Program-Fortran |
| CPT | Cluster Perturbation Theory |
| SCC | Squamous Cell Carcinoma |
| CCOSM | Chemistry And Circulation Occultation Spectroscopy Mission |
| PEIS | Programmatic Environmental Impact Statement |
| SPDM | Single-particle Density Matrix |
| NAAQS | National Ambient Air Quality Standards |