- AAA College of Engineering and Technology
- AEC3 Deutschland GmbH
- AGH University of Science and Technology [Krakow, PL]
- AGW Lawyers and Consultants
- ATOS Origin
- ATOS [madrid]
- AVL-AST d.o.o
- Aalborg University [Denmark]
- Aalen University of Applied Sciences
- Aalto University
- Abdelmalek Essaadi University [Tétouan] = Université Abdelmalek Essaadi [Tétouan]
- Academy of Armored Forces Engineering
- Accademia Musicale Studio Musica
- Accenture Labs [Ireland]
- Adani Institute of Infrastructure Engineering
- Aditro [Espoo]
- Administration of Quality and Technology Supervision of Guangdong Province
- Advanced Research Center on Electronic Systems for Information and Communication Technologies E. De Castro [Bologna]
- Agios Therissos Medical Diagnostic Centre
- Agresearch Ltd
- Agricultural Bank of China
- Agricultural Information Institute
- Agricultural Information Institution
- Agricultural Technological Extensive Station of Luntai County in Xinjiang
- Agricultural University [Plovdiv]
- Agricultural University of Hebei
- Agricultural engineer center
- Agriculture Information Institute
- AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement
- Ain Shams University
- Air Force Engineering University [Xi'an]
- Air University
- Aix Marseille Université
- Alberta Machine Intelligence Institute
- Alexander Technological Educational Institute of Thessaloniki
- Algorithms for the Grid
- Alibaba Group [Hangzhou]
- Alma Mater Studiorum Università di Bologna = University of Bologna
- Altice Labs [Aveiro]
- Amazon [Berlin]
- American University in Cairo
- American University of Beirut [Beyrouth]
- Amrita University
- Amrita Vishwa Vidyapeetham
- Amsterdam Machine Learning Lab
- Anding District People’s Armed Forces Department
- Anglia Ruskin University
- Anhui Agricultural University [Hefei]
- Anhui Institute of Architectural and Industry
- Animal Health Research Institute
- Animal Health and Veterinary Laboratories Agency
- Anna University
- Annamalai University
- Antalya Bilim University
- Applied informatics in management and economy [Messolonghi]
- Arcada University of Applied Sciences
- Arcelik A.S
- Archéologie et Archéométrie
- Argumentation, Décision, Raisonnement, Incertitude et Apprentissage
- Aristotle University of Thessaloniki
- Arizona State University [Tempe]
- Army Engineering University [Jiangsu]
- Artificial Intelligence Lab, Faculty of Computer Science
- Artificial Intelligence Research Institute | Spanish Scientific Research Council
- Arts et Métiers ParisTech
- Arts et Métiers Sciences et Technologies
- Asia Pacific University of Technology and Innovation [Petaling]
- Association EURATOM-CEA
- Associazione Euratom-ENEA sulla Fusione
- AstraZeneca
- Atacama Large Millimeter|submillimeter Array
- Ateneo de Manila University
- Athens Technology Center S.A. [Athènes]
- Athens University of Economics and Business
- Athinoula A. Martinos Center for Biomedical Imaging
- Athonet
- Atilim University
- Atomic Energy Regulatory Board
- Atos Spain
- Auckland University of Technology
- Australian Computer Society
- Australian Defence Force Academy [Canberra]
- Australian Government
- Australian National University
- Austrian Institute of Technology [Vienna]
- Auteur indépendant
- Automated Scheduling, Optimisation and Planning Research Group, School of Computer Science
- Avid Radiopharmaceuticals
- Avlos
- Avrasya Yer Bilimleri Enstitüsü = Eurasia Institute of Earth Sciences [Istanbul]
- Axon logic
- Axpo Turkey
- “Attikon” University Hospital