| Acronym | Meaning |
| NDSL | Non-Domestic Substances List |
| FEEO | Fuel Efficient Engine Operation |
| TPM | Two-potential Model (in At. Scattering Calcns.) |
| OES | Optical Emission Spectroscopy |
| NSWS | National Surface Water Survey |
| IMFP | Inelastic Mean Free Paths |
| BARF | Best Available Retrofit Facility |
| UHIPI | Ultrahigh Intensity Post-ionization |
| IMMA | Ion Microprobe Mass Analysis |
| CCGF | Coupled Cluster Green Function |