| Acronym | Meaning |
| ECBM | Extended Classical Over-barrier Model (in Calcns. On Inelastic Ion-atom Colisions) |
| ROBK2 | Relativistic Second-order Oppenheimer-Brinkman-Kramers (in Ion-scattering Calcns.) |
| IBR | In-plane Birefringence |
| DSLFS | Doppler-shift Laser Fluorescence Spectroscopy |
| ICAC | Institute Of Clean Air Companies |
| GAMETAG | Global Atmospheric Measurements Experiment Of Tropospheric Aerosols And Gases |
| DNS | Determination Of Nonsignificance |
| ORAQI | Oak Ridge Air Quality Index |
| PSXD | Position Sensitive X-ray Detector |
| ECF | Elemental Chlorine Free [as In Nonchlorine Bleaching] |