| Acronym | Meaning |
| APCA | Air Pollution Control Association |
| ITPOT | Improved Two-parameter Omega Technique |
| SSULI | Special Sensor Ultraviolet Limb Imager |
| CVOC | Chlorinated Volatile Organic Compound |
| CHF | Critical Heat Flux |
| CRISTA | Cryogenic Infrared Spectrometers And Telescopes For The Atmosphere |
| CARE | Computed-aided Risk Evaluation |
| RAS | Returned Activated Sludge |
| AQS | Air Quality Standard |
| QRPA | Quadratic Random Phase Approxn. |