| RSSC | Radar Sonar Surveillance Center 
| Others |
| RSSC | Radiation Safety Short Course
| Others |
| RSSC | Rajasthan State Sports Council
| Others |
| RSSC | Randolph Southern School Corporation
| Others |
| RSSC | Regent Seven Seas Cruises
| Others |
| RSSC | Regional Satellite Communications (SATCOM) Support Center
| Others |
| RSSC | Regional Satellite Support Cell
| Others |
| RSSC | Regional Schools Service Center
| Others |
| RSSC | Regional SIGINT (SIGnals INTelligence) Support Center
| Others |
| RSSC | Regional Signals Intelligence (SIGINT) Support Center (NSA)
| Others |
| RSSC | Regional Space Support Center
| Others |
| RSSC | Registered Side Sewer Contractors
| Others |
| RSSC | Republican Secretaries of State Committee
| Others |
| RSSC | Republican Seismic Survey Center
| Others |
| RSSC | Research Surveys and Statistics Center
| Others |
| RSSC | Residential Sewer Service Charge
| Others |
| RSSC | Residential Summer String Camp
| Others |
| RSSC | Respiratory Support and Sleep Centre
| Others |
| RSSC | Robotics Society of Southern California
| Others |
| RSSC | Ross Schonder Sterzinger Cupcheck
| Others |