- CCG|ZGDV Institute [Guimarães]
- CERTH Information Technologies Institute
- CISCO Systems, Inc
- CISTER [Porto]
- COSMOTE S.A.
- COnception de l'ACTIon en Situation
- CYENS Center of Excellence [Nicosia]
- Cardinal Stefan Wyszyński University
- Carleton University
- Carlos III University of Madrid
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for Data Analytics and Biomedical Informatics [Temple University]
- Center for REsearch And Telecommunication Experimentation for NETworked communities
- Central University of Finance and Economics [Beijing]
- Central Washington University
- Centrale Lille
- Centre Génie Industriel
- Centre National de la Recherche Scientifique
- Centre Tecnològic de Telecomunicacions de Catalunya = Telecommunications Technological Centre of Catalonia
- Centre de Bioinformatique
- Centre for Applied Internet Research
- Centre for Autonomous Systems, University of Lincoln
- Centre for Informatics and Systems of the University of Coimbra - CISUC
- Centre for Research and Technology Hellas
- Centre for Research and Technology Hellas [Athènes]
- Centre of Physics of the University of Minho
- Centro Algoritmi [Guimarães]
- Centro Federal de Educação Tecnológica de Minas Gerais
- Centro Tecnológico Industrias Têxtil Vestuário Portugal
- Centro Unico Regionale Trapianti di Cellule Staminali e Terapie Cellulari “A. Neri”
- Centro de Computação Gráfica
- Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
- Chair for Artificial Intelligence
- ChannelSight, Research and Development Center
- Chercheur indépendant
- Chinese Academy of Sciences [Changchun Branch]
- Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel
- Christopher Newport University
- City College [International Faculty of the University of Sheffield]
- City University
- Clemic Services S.A
- Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093]
- Cognitive Interaction Technology [Bielefeld]
- Colep Packaging [Vale de Cambra]
- College of Engineering [Pune]
- College of Informational Science and Technology
- Commissariat à l'énergie atomique et aux énergies alternatives
- Computer Engineering Department [Istanbul]
- Computer Engineering and Informatics Department
- Computer Laboratory [Cambridge]
- Computer Learning Research Centre [Royal Holloway, University of London]
- Computer Learning Research Centre and Department of Computer Science, Royal Holloway
- Computer Learning Research Centre, Royal Holloway
- Computer Science Department
- Computer Science and Engineering Department
- Computer Science and Engineering department
- Computer Science and Statistics Department- INE - CTC
- Computer Technology Institute
- Computer, Electrical and Mathematical Sciences and Engineering Division [Thuwal]
- Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain]
- Consorzio Nazionale Interuniversitario per le Telecomunicazioni [Roma]
- Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione
- Constantine the Philosopher University in Nitra
- Continental Automotive GmbH
- Control and Automation Engineering [Istanbul]
- Coordinación de Ciencias Computacionales [INAOE]
- Council for Scientific and Industrial Research [Pretoria]
- Council of Agriculture
- Coventry University
- Cranfield University
- Culham Science Centre [Abingdon]
- Curtin Business School
- Curtin University
- Cyprus Institute of Neurology and Genetics
- Cyprus University of Technology
- Czech Academy of Sciences [Prague]
- Czech Technical University in Prague
- commonspace [Athens]