| Acronym | Meaning |
| LID | Lased Induced Desorption |
| RHF SP | Restricted Hartree Fock Spin Polarization |
| CCAP | Center For Clean Air Policy |
| GMAD | Geometric Mean Aerodynamic Diameter |
| NBS | National Bureau Of Standards |
| EMF | Electromobility Focusing |
| HEN | Heat Exchanger Network |
| NCEA | National Center For Environmental Assessment |
| MVEG | Motor Vehicle Emissions Group |
| QEEC | Quasimol. Extended Elementary Cell (for Electronic Structure Calcns. Of Crystals) |