| Link | Location |
|---|
| Natalia Rusova | Moscow, Russian Federation |
| Josh Ryan | Fort Collins, Colorado, United States |
| Denys Ryzhykh | Haarlem, Netherlands |
| Andrew S | Rockville Centre, New York, United States |
| Andrejs Sabasovs | Riga, Latvia |
| Jon Sagui | Madison, Wisconsin, United States |
| Pranay Sahgal | Rockville Centre, New York, United States |
| Yuriy Sakharov | Moscow (online), Russian Federation |
| Sławomir Salamon | Kraków, Poland |
| Amer Saleh | Leicester, United Kingdom |
| Dmitry Samoylov | Moscow online, Russian Federation |
| Gregg Sanderson | Madison, Wisconsin, United States |
| Eduard Sandor | Cluj-Napoca, Romania |
| Debopom Sanyal | Rockville Centre, New York, United States |
| Kokela saravanan | Rockville Centre, New York, United States |
