- T-Mobile Czech Republic,
- TXT e-solutions s.p.a
- Tallinn University of Technology
- Tata Consultancy Services Limited
- Tata Consultancy Services Research
- Technical University of Lisbon
- Technical University of Sofia [Bulgaria]
- Technische Universiteit Eindhoven
- Technische Universität Dresden = Dresden University of Technology
- Technische Universität Kaiserslautern
- Technische Universität Munchen - Technical University Munich - Université Technique de Munich
- Technological Center for the Ceramic and Glass
- Thammasat Business School
- Thammasat University
- The Enterprise Engineering Company 2
- The MITRE corporation
- The Netherlands Organisation for Applied Scientific Research
- Third Research Institute
- Tiani Spirit
- Tilburg University [Netherlands]
- Tokyo Institute of Technology [Tokyo]
- Tomsk State University of Control Systems and Radioelectronics
- Télécom SudParis