| Acronym | Meaning |
 | SMT | Standards |
| SQM | Scaled Quantum Mechanics (in Ab Initio Calcns.) |
| SCIAMACHY | SCanning Imaging Absorption SpectroMeter For Atmospheric CHartographY |
| SSF | Synchronous Scanning Fluorescence |
| BAL | Broad Absorption Line |
| SAT | Sulfuric Acid Trihydrate (polar Stratosphere Cloud Aerosol) |
| LASP | Laboratory For Atmospheric And Space Physics |
| NTU | Number Of Transfer Units (in Packed Tower Aeration System) |
| LAKE | Clean Lakes Database (accessible Through OLS) |
| TPA | Tissue Plasminogen Activator |
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