| ICC(S) | Intraclass Correlation Coefficient(S) 
| Others |
| ICCS | Illinois Coalition for Community Services
| Others |
| ICCS | Immaculate Conception Cathedral School
| Others |
| ICCS | Immaculate Conception Catholic School
| Others |
| ICCS | Implementing College and Career Standards
| Others |
| ICCS | Implementing the Common Core Standards
| Others |
| ICCS | Impressions Clicks Conversions and Spend
| Others |
| ICCS | In Car Communication Systems
| Others |
| ICCS | Independent Coordination and Certification Squad
| Others |
| ICCS | Indiana Cyber Charter School
| Others |
| ICCS | Institute for Community Collaborative Studies
| Others |
| ICCS | Institute for Creative Civil Strategies
| Others |
| ICCS | Institute of Communication and Computer Systems
| Others |
| ICCS | Integrated Chassis Control System
| Others |
| ICCS | Intelligent Career Card Sort
| Others |
| ICCS | Intelligent Control and Command Systems
| Others |
| ICCS | Intelligent Cruise Control System
| Others |
| ICCS | Interaction Center Core Specialist
| Others |
| ICCS | Intercollegiate Center for Classic Studies
| Others |
| ICCS | Intercollegiate Center for Classical Studies
| Others |
| ICCS | Interior Communications Electrician Senior Chief Petty Officer
| Others |
| ICCS | International Cancer Cluster Showcase
| Others |
| ICCS | International Catholic Conference of Scouting
| Others |
| ICCS | International Center for Communication Studies
| Others |
| ICCS | International Center for Computational Science
| Others |
| ICCS | International Children's Continence Society
| Others |
| ICCS | International Civic and Citizenship Study
| Others |
| ICCS | International Clinical Cytometry Society
| Others |
| ICCS | International Coastal Cleanup Singapore
| Others |
| ICCS | International Coin Certification Service
| Others |
| ICCS | International Commision for Control and Supervision
| Others |
| ICCS | International Commission of Control and Supervision
| Others |
| ICCS | International Commission on Civil Status
| Others |
| ICCS | International Conference on Chemical Structures
| Others |
| ICCS | International Conference On City Sciences
| Others |
| ICCS | International Conference on Climate Services
| Others |
| ICCS | International Conference on Complex Systems
| Others |
| ICCS | International Conference on Computational Science
| Others |
| ICCS | International Conference on Cyber Security
| Others |
| ICCS | International Conferences on Conceptual Structures
| Others |
| ICCS | International Content Certification Standard
| Others |
| ICCS | International Council for Canadian Studies
| Others |
| ICCS | International Customer Care Services
| Others |
| ICCS | Interstate Contract Cleaning Services
| Others |
| ICCS | Intervention Community Corrections Services
| Others |
| ICCS | Island Crossing Counseling Services
| Others |