- ATOS
- ATOS Origin
- ATOS [Barcelona]
- ATOS [madrid]
- Aalto University
- Aarhus University Hospital
- Administratia Nationala de Meteorologie
- Agriculture Division: Department of Environment and Primary Industries
- Agriculture Research: Department of Environment and Primary Industries
- AgroApps
- Agroknow [Athens]
- Agrophysical Research Institute
- Aoyama Gakuin University
- Aristotle University of Thessaloniki