| Acronym | Meaning |
| PAR | Population At Risk |
| CARIBIC | Civil Aircraft For Remote Sensing And In Situ Measurements In Troposphere And Lower Stratosphere Based On The Instrumentation |
| MCR | Minimum Creep Rate |
| SORP | Southern Oxidants Research Program |
| LSW | Localized Spherical Wave (in Electronic Structure Calcns.) |
| OUST | Office Of Underground Storage Tanks |
| QCI | Quadratic Configuration Interaction |
| NSF | National Science Foundation |
| CAQ | Computer Aided Quality Assurance |
| FSMRCC | Fock Space Multireference Coupled Cluster |