| Acronym | Meaning |
| ALAD | Delta-aminolevulinic Acid Dehydratase (lead Poisoning Indicator) |
| BRI | Building-related Illness |
| AMI | Active Microwave Instrument |
| ASW | Augmented Spherical Wave |
| ORFEUS | Orbiting Retrievable Far And Extreme Ultraviolet Spectrometers |
| EXES | Electron-induced X-ray Emission Spectrometry |
| FCCU | Fluidized Catalytic Cracking Unit |
| SASU | Source Apportionment |
| LULU | Locally Undesirable Land Use |
| ARDS | Adult Respiratory Distress Syndrome |