| Acronym | Meaning |
| VETESS | Vehicle Transient Emissions Simulation Software |
| AGA | American Gas Association |
| FDM | Finite-difference Method |
| DPP | Differential-pulse Polarography |
| DI | Differentiation Index |
| DDIM | Dry Deposition Inferential Monitoring |
| LAGST | Leaking Above Ground Storage Tank |
| MRP | Medical Removal Protection |
| BCA | Binary-collision Approximation |
| IIRF | Intergalactic IR Radiation Field |