| Acronym | Meaning |
| CRC | Coupled-reaction-channels (quantum Calcn. Method) |
| MPI | Mass Psychogenic Illness (in Indoor Air Pollution) |
| DISI | Direct-injection Spark-ignition |
| BMX | Brominated MX |
| WEF | Water Environment Federation (formerly WPCF) |
| ID | Isotope Dilution |
| ELAP | Environmental Laboratory Accreditation Program |
| PRIME | Purdue Rare Isotope Measurement Laboratory |
| APCA | Air Pollution Control Association |
| OCT | Optical Coherence Tomography |