- PIXIEL GROUP
- PPGIA [Curitiba]
- PRES Université de Toulouse
- Paavo Nurmi Centre and Department of Health and Physical Activity [Turku]
- Pace University
- Palo Alto Research Center
- Parallélisme, Réseaux, Systèmes, Modélisation
- Peer-to-Peer Systems Engineering Lab [Darmstadt]
- Peerialism AB [Stockholm]
- Peking University [Beijing]
- Pengcheng Laboratory = Peng Cheng Laboratory [Shenzhen]
- Penn State System
- Pennsylvania Commonwealth System of Higher Education (PCSHE)
- Pennsylvania State University
- People's Friendship University of Russia [Moscow] = Rossijskij universitet družby narodov [Moskva]
- Peoples’ Friendship University of Russia
- Performance Analysis of Telecommunication Systems Research Group
- Performance analysis and optimization of LARge Infrastructures and Systems
- Pforzheim University
- Phare
- Philips Research Laboratories [Eindhoven]
- Physics Department
- Pine Digital Security
- Pinhal de Marrocos
- Plymouth University
- Pohang University of Science and Technology
- Polar Electro Oy
- Politecnico di Milano [Milan]
- Politecnico di Torino = Polytechnic of Turin
- Pontificia universidad Javeriana, Cali
- Pontifícia Universidade Católica do Rio Grande do Sul [Brasil] = Pontifical Catholic University of Rio Grande do Sul [Brazil] = Université catholique pontificale de Rio Grande do Sul [Brésil]
- Pontifícia Universidade Católica do Rio de Janeiro [Brasil] = Pontifical Catholic University of Rio de Janeiro [Brazil] = Université catholique pontificale de Rio de Janeiro [Brésil]
- Poznan University of Technology
- Poznań University of Economics and Business
- Preuves, Programmes et Systèmes
- Private Joint Stock Company "Elsis TS" [Kaunas]
- Process for Adaptative Software Systems
- Programa de Engenharia Elétrica
- Programa de Engenharia de Sistemas e Computação
- Programming Language Technology For Communication Services
- Promerit AG
- Proof-oriented development of computer-based systems
- Protocols and applications for the Internet
- Public Authority for Applied Education & Training
- Public authority for applied education and training, Al-Ardeya
- Pukyong National University
- Purdue University [West Lafayette]