- CA-MI S.r.l.
- CEACI-THALES
- CERN [Genève]
- CERTH
- CLMS UK Ltd
- COMSATS Institute of Information Technology [Islamabad]
- CSIRO Computational Informatics
- Calcutta Institute of Engineering and Management
- California State University [Fresno]
- California State University [Monterey Bay]
- Canterbury Christ Church University
- Cape Peninsula University of Technology
- Cardiff University
- Cardinal Stefan Wyszyński University
- Carleton University
- Carlson School of Management
- Carnegie Mellon University [Pittsburgh]
- Case Western Reserve University [Cleveland]
- Catholic University of Korea
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for Advanced Security Research Darmstadt [Darmstadt]
- Center for Advanced Studies [IBM CAS Canada]
- Center for Applied ICT
- Center for Higher Education Policy Studies
- Center for Industrial Production
- Center for Process Innovation, J. Mack Robinson College of Business
- Center for Research on Direct Democracy
- Center for Technology in Government
- Center for e-Government Studies
- Center of Operation Research and Econometrics [Louvain]
- Central Police University
- Central University of Finance and Economics [Beijing]
- CentraleSupélec
- Centre Génie Industriel
- Centre National de la Recherche Scientifique
- Centre National d’Études Spatiales [Paris]
- Centre Universitaire d'Informatique
- Centre d'Etudes et de Recherche en Droit de l'Immatériel
- Centre d'études et de recherches appliquées à la gestion
- Centre de Recherche Public Henri-Tudor [Luxembourg]
- Centre de Recherche en Informatique de Paris 1
- Centre de recherche en gestion [EA 1722]
- Centre for Applied Research in Information Systems
- Centre for Cybercrime and Computer Security [Newcastle]
- Centre for Democracy Studies Aarau
- Centre for Development of Advanced Computing [Thiruvananthapuram]
- Centre for Informatics and Systems of the University of Coimbra - CISUC
- Centre for Innovation & Structural Change
- Centre for Interactive Systems Research
- Centre for Public Administration
- Centre for Quantum Computation and Intelligent Systems [Sydney]
- Centre for Research and Technology Hellas
- Centre for Research and Technology Hellas [Athènes]
- Centre for Science and Technology Studies [Leiden]
- Centre for Secure, Intelligent and Usable Systems [Brighton]
- Centre of Excellence IT4Innovations
- Centro de Computação Gráfica
- Centro de Informatica UFPE [Recife]
- Centro de Investigaciones en Tecnologías de la Información y Comunicación
- Centro de Investigación en Métodos de Producción de Software
- Centro de Investigación y Docencia Económicas [Mexico]
- Ch. Ranbir Singh State Institute of Engineering and Technology
- Chair for Information Systems I17
- Chair for Information Systems [Munich]
- Chair of Corporate Strategy & Innovation [Lausanne]
- Chair of Mobile Business & Multilateral Security
- Chalmers University of Technology [Gothenburg, Sweden]
- Chalmers University of Technology [Göteborg]
- Chandragupt Institute of Management Patna
- Chasquis Consulting
- Chebyshev Laboratory
- Chercheur indépendant
- Chiba Institute of Technology
- China Aerodynamics Research and Development Center
- China Food and Drug Administration
- China Information Technology Security Evaluation Center
- China Medical University Hospital
- China Medical University Taichung
- China Shanghai Institute of Precision Measurement and Testing
- China Unicom
- Chinese Academy of Sciences [Changchun Branch]
- Chinese Culture University [Taipei]
- Chinese PLA General Hospital
- Chonbuk National University
- Chongqing Technology and Business University
- Chongqing University [Chongqing]
- Chongqing University of Technology
- Chonnam National University
- Chosun University
- Christian Doppler Laboratory for Security and Quality Improvement and Quality Improvement in the Production System Lifecycle
- Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel
- City University London
- City University of Hong Kong [Hong Kong]
- City University of London
- Claremont Graduate University [Claremont, CA ]
- Cochin University of Science and Technology
- College of Computer Studies
- College of Engineering [Guindy]
- College of Engineering and Science [Louisiana]
- College of Information Science and Engineering [Biwako-Kusatsu Campus]
- College of Information Studies
- College of Mathematics, Physics and Information Engineering [Jinhua]
- College of William and Mary [Williamsburg]
- Collibra SA-NV [Brussels]
- Collins Aerospace India
- Collins Aerospace USA
- Collège du Management de la Technologie [Lausanne]
- Collège du management de la technologie
- Colombian Center of Excellence and Appropriation on Big Data and Data Analytics
- Commissariat à l'énergie atomique et aux énergies alternatives
- Commitment AS [Lysaker]
- Commonwealth Scientific and Industrial Research Organisation [Canberra]
- Computer Engineering Department
- Computer Graphics and HCI Group [Kaiserslautern]
- Computer Science Department
- Computer Science Department, Faculty of Automatic Control and Computers
- Computer Science Division - School of Science and Technologies
- Computer Science [Louisiana]
- Computer Science and Communications Research Unit [Luxembourg]
- Computer Security and Industrial Cryptography [KU Leuven]
- Concordia Institute for Information Systems Engineering
- Concordia University [Montreal]
- Consiglio Nazionale delle Ricerche [Milano]
- Consiglio Regionale della Campania
- Construction and Analysis of Systems for Confidentiality and Authenticity of Data and Entities
- Consult Hyperion
- Continental AG [Hannover]
- Control and Energy Management Laboratory (CEM Lab), Sfax Engineering School
- Copenhagen Business School
- Copenhagen Business School [Copenhagen]
- Corvinus University of Budapest
- Council for Scientific and Industrial Research [Pretoria]
- Council for Scientific and Industrial Research [South Africa]
- Court of First Instance of Serres
- Covenant University
- Coventry University
- Cracow Univeristy of Technology
- Craig School of Business [California]
- Cross-border Research Association
- Cryptography and Computeralgebra, Department of Computer Science
- Curtin University
- Curtin University Sustainability Policy Institute
- Curtin University of Technology
- Customs Administration of the Netherlands [Amsterdam]
- Customs Administration of the Netherlands [Rotterdam]
- Cyntelix Corporation Ltd.
- Czech Technical University in Prague
- Częstochowa University of Technology