| Acronym | Meaning |
| 2PH TDA | Two-particle-hole Tamm-Dancoff Approximation (for Closed-shell |
| ECLSS | Environmental Control And Life Support System |
| FIAT | Field Information Agency Technical |
| MDW | Multichannel Distorted Wave (Born Approxn.) |
| NAFTA | North American Free Trade Agreement |
| MMR | Magnetometric Restivity (method For Subsurface Characterization) |
| AS | Auger Spectroscopy |
| CCA | Canonical Correspondence Analysis |
| OSW | Office Of Solid Waste (US EPA) |
| GDR | German Democratic Republic |