| Acronym | Meaning |
| AQMD | Air Quality Management District |
| ARP | Angle-resolved Photoemission |
| HTLA | Heat-treatable Low Alloy (steel) |
| CSD | Chemical Solution Deposition |
| COSPAR | Committee On Space Research |
| CCI | Contracted Configuration Interaction |
| AIP | Acute Intermittent Porphyria |
| ASAS | Advanced Solid State Array Spectrometer |
| ECBM | Enhanced Coalbed Methane (recovery) |
| CPVC | Chlorinated Polyvinyl Chloride |