| Acronym | Meaning |
| LCGTO-DF | Linear Combination Of Gaussian Type Orbitals-density Functional |
| XMCD | X-ray Magnetic Circular Dichroism |
| UPS | Uninterrupted Power Systems (for Computer Networks) |
| RBM | Random Bonding Model |
| NRT | National Response Team |
| DCBX | Distorted Coulomb-Born Exchange Approxn. |
| IMEP | International Measurement Evaluation Program |
| SCI | Single Excitation Configuration Interaction |
| PESC | Photoelectrochemical Solar Cell |
| EMCOR | European Minor Constituent Radiometer |