| Acronym | Meaning |
| GRIDS | Geographic Resources Information And Data System |
| ACC-IOS | Azimutal Close Coupled-infinite Order Sudden |
| NIAID | National Institute Of Allergy And Infectious Diseases |
| CNDO/OPTIC | CI Method For Elec. Transition Moments Of The Optical Transition Of Large Mols. Based On CNDO/S Parametrization |
| MPPCF | Millions Of Particles Per Cubic Foot |
| ECS-P | Energy-corrected Sudden-polynomial (scaling Law) |
| VF | Valence Force (model In Bond Properties Calcns. In Solids) |
| IGC | Inverse Gas Chromatog. |
| BXE | Bombardment-induced X-ray Emission |
| CS-AAS | Continuous Source Atomic Absorption Spectroscopy |