| Acronym | Meaning |
| SOP | Split-operator Propagator |
| MDH | Malate Dehydrogenase |
| CM | Configuration Mixing |
| PSES | Pretreatment Standards For Existing Sources |
| TICT | Twisted Intramolecular Charge Transfer |
| QSMD | Quantum-stochastic Mol. Dynamics |
| PIAMS | Photoionization Aerosol Mass Spectrometry |
| CFAST | Center For Field Analytical Studies And Technology |
| LISPS | Laser-induced Shock Wave Plasma Spectroscopy |
| POA | Peierls-Onsager Approxn. (in Electronic Structure Calcns.) |