| Acronym | Meaning |
| OLDA | Ordinary Linear Discriminant Analysis |
| ETS | Environmental Tobacco Smoke |
| ESD | Element-Specific Detector |
| TDOPM | Time-dependent Optimized Potential Method |
| APELL | Awareness And Preparedness For Emergencies At Local Level |
| CTCF | Collisional Time Correlation Function (in Quantum Calcns. On Mol. Inelastic Collisions) |
| MAVRIQ | Model Of Analysis Of Volatiles And Residential Indoor-air Quality |
| FATES | FIRFA And TSCA Enforcement System (now Known As SSTS) |
| MR-MBPT | Multireference-many-body Perturbation Theory |
| CREB | CAMP-responsive Element-binding |