- CAS Software [Karlsruhe]
- CASE - Center for Applied Software Engineering
- CASH - Compilation and Analysis, Software and Hardware
- CISTER [Porto]
- CITI Centre of Innovation in Telecommunications and Integration of services
- CNR Istituto di Scienza e Tecnologie dell’Informazione “A. Faedo” [Pisa]
- COMmunications, Réseaux, systèmes Embarqués et Distribués
- Caixa Mágica Software
- Canter of China Study
- Canterbury Christ Church University
- Cap Gemini [Amsterdam]
- Cape Peninsula University of Technology
- Carleton University
- Carnegie Mellon University [Pittsburgh]
- Carnegie Mellon University [Silicon Valley]
- Catholic University of Leuven = Katholieke Universiteit Leuven
- Center for Research & Development in Mathematics and Applications [Aveiro]
- Center for Research on Information, Customer and Innovation Management
- CentraleSupélec
- Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier
- Centre International de Hautes Études Agronomiques Méditerranéennes
- Centre National de la Recherche Scientifique
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement
- Centre de recherche en gestion
- Centre d’Excellence en Technologies de l’Information et de la Communication
- Centre for Organisational Research
- Centre for Quantum Computation and Intelligent Systems &, School of Software
- Centre international d'études supérieures en sciences agronomiques
- Centre of Research on Open Source Software (CROSS)
- Centre of Research on Open Source Software - CROSS
- Centro Neurolesi Bonino Pulejo Messina
- Centro de Competência em Software Livre Qualipso at University of São Paulo
- Centro de Investigaçao e Desenvolvimento em Matematica e Aplicaçoes
- Centrum Wiskunde & Informatica
- Centrum voor Wiskunde en Informatica
- Certus Centre for Software Validation and Verification
- Chalmers University of Technology [Göteborg]
- Chemnitz University of Technology | Technische Universität Chemnitz
- Chennai Mathematical Institute [Inde]
- Chinese Academy of Sciences [Beijing]
- Chinese Academy of Sciences [Changchun Branch]
- Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel
- City College [International Faculty of the University of Sheffield]
- Clemson University
- Cluster of Excellence Multimodal Computing and Interaction
- Codethink Ltd.
- Combination of approaches to the security of infinite states systems
- Combitech AB
- Computer Emergency Response Team (Research and Academic Computer Network (NASK))
- Computer Science and Engineering Department [Bucharest]
- Computer Science department [Michigan Tech]
- Computing Science Department
- Computing and Information Systems [Kingston University London]
- Concurrency, Mobility and Transactions
- Consiglio Regionale della Lombardia [Milano]
- Consorzio per il Trasferimento Tecnologico
- Construction of verified concurrent systems
- Copenhagen Business School [Copenhagen]
- Cornell University [New York]
- Costa Rica Institute of Technology [Cartago]
- Cracow University of Technology
- Credit Suisse
- Czech Academy of Sciences [Prague]