Contest Abbreviations and Acronyms
- SOSingle-Op
- SO2RSingle Operator Two Radio
- SO2RSingle Operator 2 Radio
- SO2RSingle Operator 2 Radios
- SOABSingle Op, All Bands
- SOABSingle Operator All Band
- SOABSingle Operator All Bands
- SOABSingle Operator, All Bands
- SOABSingle Operator, All Band
- SOSBSingle Op, Single Band
- SOSBSingle Operator Single Band
- SRPRSpoon River Poetry Review
- SSDSGPSStefan Sucht Den Luper-Grand-Prix-Star
- SYLRAScandinavian Young Ladies Radio Amateurs
- TAGTambov Awardagroup
- TARATroy Amateur Radho Association
- TIDATaipei International Design Award
- TOTFATexas Old Time Fiddlers Association
- UCCUkrainian Czntest Club
- UCFUrban Culture Festival
Last updated: — Total entries: 142