| Acronym | Meaning |
| ICRU | International Commission On Radiation Units And Measurements |
| GAEP | Generalized Atomic Effective Potential |
| CEPPO | Chemical Emergency Preparedness And Prevention Office |
| HKS | Hartree-Kohn-Sham (quantum Theory) |
| IEHT | Iterative Extended Hueckel Theory |
| RFM | Relativistic Mean Field |
| LNAPL | Light Nonaqueous Phase Liquid |
| IF DRM | Inversion-free Direct Recursion Method (for Surface Electronic Structure) |
| SAPHIR | Spectrometer Arrangement For Photon Induced Reactions |
| LISA | Lander For Ion-selective Analysis |