| Acronym | Meaning |
| DAA | Days After Anthesispar |
| DONUT | Direct Observation Of The Nu Tau |
| MLIS | Molecular Laser Isotope Separation |
| ANPRM | Advance Notice Of Proposed Rulemaking |
| BIS | Bremsstrahlung Isochromat Spectroscopy |
| VESCF | Variable Electronegativity Self-consistent Field |
| UHC | Unburned Hydrocarbons |
| DLCA | Diffusion Limited Cluster Aggregation |
| ZOAO | Zero Overlap Of Atomic Orbital Approxn. |
| MSMO | Multiple Scattering Molecular Orbital Method (also Known As X(alpha) Scattered-wave) |