| Acronym | Definition |
|---|
| CCSS➣Common Core State Standards (various locations) |
| CCSS➣Crisis Center for South Suburbia (Tinley Park, IL) |
| CCSS➣Caja Costarricense del Seguro Social (Costa Rican Social Security Institution) |
| CCSS➣California Council for the Social Studies (Chico, CA) |
| CCSS➣Coweta County School System (Newnan, GA) |
| CCSS➣Center for Civil Society Studies |
| CCSS➣Childhood Cancer Survivor Study (St. Jude Children's Research Hospital; Memphis, TN) |
| CCSS➣Commission des Comptes de la Sécurité Sociale (French: Social Security Accounts Commission) |
| CCSS➣Cherokee County School System (Georgia) |
| CCSS➣CatholicCare Social Services (Australia) |
| CCSS➣Commodity Command Standard System |
| CCSS➣Centre Commun de la Sécurité Sociale (French: Joint Center for Social Security; Luxembourg) |
| CCSS➣Catmull Clark Subdivision Surface (computer graphics algorithm) |
| CCSS➣Colorado Cactus and Succulent Society |
| CCSS➣Coroners' Courts Support Service (UK) |
| CCSS➣Chilean Computer Science Society |
| CCSS➣Common Channel Signaling System |
| CCSS➣Commercial Closed Source Software |
| CCSS➣Comprehensive Community Support Services (New Mexico) |
| CCSS➣Council of Christian Scholarly Societies |
| CCSS➣Cass Community Social Services |
| CCSS➣Caisse Commune de Sécurité Sociale (French: Common Fund for Social Security) |
| CCSS➣Cryptologic Combat Support System |
| CCSS➣Center for Complex Systems Studies (Kalamazoo College) |
| CCSS➣Center for Computer System Security |
| CCSS➣Computer Crime and Security Survey |
| CCSS➣Combat Command Support System |
| CCSS➣Controlled Copy Support Systems, Inc |
| CCSS➣Community Charge for Standard Spending (UK) |
| CCSS➣Comanche Crew Support System |
| CCSS➣Combat Communications Support Squadron |
| CCSS➣Conference of the Cognitive Science Society |
| CCSS➣Communications Channel Signalling System |
| CCSS➣Consolidated Critical Support System |
| CCSS➣Chaotic Complex Spreading Sequence |
| CCSS➣Combat Cryptologic Support System |
| CCSS➣Command and Control Simulation System |
| CCSS➣Command Center Support System |
| CCSS➣Command Commodity Supply System |
| CCSS➣CSIRT Collaboration Support System |
| CCSS➣Command & Control Switching Systems |
| CCSS➣Coordination Committee on Social Sector |
| CCSS➣Canadian Computer Security Symposium |
| CCSS➣Cadet Command and Staff School (Howard Payne University; Brownwood, TX) |
| CCSS➣Cedar Creek State School (Gold Coast, Australia) |
| CCSS➣Communications-Computer Systems Security |
| CCSS➣China Current Student Society (Harvard University) |
| CCSS➣Cruise Control Set Switch |
| CCSS➣Coordinating Committee on the Social Sector |
| CCSS➣Certified Church Security Specialist |