| Acronym | Meaning |
| TGMA | Task Group Of Metal Accumulation |
| MEHT | Modified Extended Hueckel Theory |
| AA | Aluminum Association |
| NMDS | Nonmetric Multidimensional Scaling |
| EUMAC | European Modeling Of Atmospheric Constituents |
| IEC | Inertial Electrostatic Confinement |
| AMSA | Association Of Metropolitan Sewerage Agencies |
| SAD | Selected Area Diffraction Patterns (crystal Chemistry) |
| NNLO | Next-to-next-to-leading Order |
| NCAT | National Catalog Database (accessible Through OLS) |