- CERTH
- Carleton University
- Catholic University of Korea
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for Advanced Security Research Darmstadt [Darmstadt]
- Center for Higher Education Policy Studies
- Center for Research on Direct Democracy
- Center for Technology in Government
- Center for e-Government Studies
- Centre National de la Recherche Scientifique
- Centre Universitaire d'Informatique
- Centre for Democracy Studies Aarau
- Centre for Informatics and Systems of the University of Coimbra - CISUC
- Centre for Public Administration
- Centre for Research and Technology Hellas
- Centre for Research and Technology Hellas [Athènes]
- Centro de Investigación y Docencia Económicas [Mexico]
- Chair for Information Systems I17
- Chair for Information Systems [Munich]
- Chair of Corporate Strategy & Innovation [Lausanne]
- Chercheur indépendant
- City University of Hong Kong [Hong Kong]
- College of Computer Studies
- College of Information Studies
- College of William and Mary [Williamsburg]
- Collège du Management de la Technologie [Lausanne]
- Collège du management de la technologie
- Computer Science Department, Faculty of Automatic Control and Computers
- Computer Science Division - School of Science and Technologies
- Consiglio Regionale della Campania
- Copenhagen Business School [Copenhagen]
- Corvinus University of Budapest
- Court of First Instance of Serres
- Cross-border Research Association
- Customs Administration of the Netherlands [Amsterdam]
- Customs Administration of the Netherlands [Rotterdam]
- Cyntelix Corporation Ltd.