| Acronym | Meaning |
| QLUC | Quasimolecular Large Unit Cell (model For Electronic-structure Calcns. On Solids) |
| ORAQI | Oak Ridge Air Quality Index |
| DCBA | Drift Chamber Beta-ray Analyzer |
| TVOC | Total Volatile Organic Compounds |
| TACB | Texas Air Control Board |
| RMBPT | Relativistic Many-body Perturbation Theory |
| GEMS | General Energy And Material Balance System [model] |
| ICPAC | International Committee On Polycyclic Aromatic Compounds |
| ECG | Ecosystem Conservation Group |
| DIC | Differential Interference Contrast |