| Acronym | Meaning |
 | SCISAS | Size Classifying Isokinetic Sequential Aerosol Sampler |
| STLS | Singwi-Tosi-Land-Sjolander (generalized Random-phase Approxn. For Effective Pair Potentials Of Liq. Metals) |
| SXAPS | Soft X-ray Appearance Potential Spectroscopy |
| MCV | Mesoscale Convective Vortex |
| SPEAR | Stanford Positron Electron Accelerating Ring |
| CWT | Centralized Waste Treatment |
| BPH | Benign Prostatic Hyperplasia |
| ORPA | Optimized Random Phase Approximation |
| CRISTA | Cryogenic Infrared Spectrometers And Telescopes For The Atmosphere |
| RD/RA | Remedial Design/Remedial Action |
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