| Acronym | Meaning |
| NASP | National Aerospace Plane |
| ANPRM | Advance Notice Of Proposed Rulemaking |
| VISITT | Vendor Information System For Innovative Treatment Technology (US EPA) |
| TAC | Toxic Air Contaminant |
| STLC | Soluble Threshold Limit Concentration |
| PC | Personal Computer |
| CPCCSD | Coupled-perturbed Coupled-cluster (with) Single (and) Double Excitation |
| GTO | Gaussian-type Orbital |
| FEEO | Fuel Efficient Engine Operation |
| FLAIR | Fluid Attenuated Inversion Recovery |