| CCSS | Caja Costarricense de Seguro Social 
| Others |
| CCSS | California Council for the Social Studies
| Others |
| CCSS | Cambodian Civil Society Strengthening
| Others |
| CCSS | Campus and Community Student Services
| Others |
| CCSS | Canada's Cyber Security Strategy
| Others |
| CCSS | Car Customer Satisfaction Study
| Others |
| CCSS | Cass Community Social Services
| Others |
| CCSS | Center for Catalysis and Surface Science
| Others |
| CCSS | Center for Civil Society Studies
| Others |
| CCSS | Center for Complex System Studies
| Others |
| CCSS | Center for Computer Systems Security
| Others |
| CCSS | Center for Cyber Security Studies
| Others |
| CCSS | Central Community School System
| Others |
| CCSS | Centre for Complex Systems Studies
| Others |
| CCSS | Centrifugally Cast Stainless Steel
| Others |
| CCSS | Certified Cloud Security Specialist
| Others |
| CCSS | Chevrolet Camaro Super Sport
| Others |
| CCSS | Childhood Cancer Survivor Study
| Others |
| CCSS | Children's Corrective Surgery Society
| Others |
| CCSS | Chinese Character Syn thesis
| Others |
| CCSS | Chinese Character Synthesis System
| Others |
| CCSS | Clinical Care Support System
| Others |
| CCSS | Comanche Crew Support System
| Others |
| CCSS | Combat System and Command Support System Directorate
| Others |
| CCSS | Command Commodity Standard System
| Others |
| CCSS | Commodity Command Standard System
| Others |
| CCSS | Common Channel Signaling System
| Others |
| CCSS | Common Computing Security Standards
| Others |
| CCSS | Common Configuration Scoring System
| Others |
| CCSS | Common Core State Standards
| Others |
| CCSS | Common Core States Standards
| Others |
| CCSS | Communications Circuits and Sensing Systems
| Others |
| CCSS | Community Counseling Supportive Services
| Others |
| CCSS | Comprehensive Community Service System
| Others |
| CCSS | Comprehensive Community Support Services
| Others |
| CCSS | Consolidated Community School Services
| Others |
| CCSS | Crescent City Sound Studios
| Others |
| CCSS | Cross Channel Sales and Services
| Others |