| Acronym | Meaning |
 | PESA | Proton Elastic Scattering Anal. |
| PSC | Polar Stratospheric Clouds (in Antarctic) |
| CCSR | Calcium Carbonate Saturation Ratio |
| APME | Association Of Plastics Manufacturers In Europe |
| ISC | Industrial Source Complex |
| PODS | Periodic Orbit Dividing Surfaces (in Potential Surface Calcn.) |
| CST | Central Standard Time |
| SPICE | Simulation Program With Integral Circuit Emphasis |
| OAQPS | Office Of Air Quality Planning And Standards |
| CSIR | Council For Scientific And Industrial Research (South Africa) |
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