| Acronym | Meaning |
| NESCAUM | North East States Coalition For Air Use Management |
| SF-PNM | Step Function Perturbative Numerical Method |
| ESQC | Elastic Scattering Quantum Chemistry |
| SARS | Severe Acute Respiratory Syndrome |
| PREVENT | Pacific Northwest Regional Visibility Expt. Using Natural Tracers |
| FNO | Frozen Natural Orbital |
| VOIE | Valence Orbital Ionization Energy |
| J(Z)CCS | J(z) Conserving Centrifugal Sudden Approximation (in Molecular Collisions |
| NIST | National Institute Of Standards And Technology (formerly NBS) |
| LSDSIC | Local-spin-density Self-interaction-correction Approxn. (in Total Energy Calcns. For Atoms) |