| PhD from University of Technology Belfort-Montbeliard |  |
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- OAO FOMOS
- OEwaves
- ONERA - The French Aerospace Lab [Châtillon]
- ONERA - The French Aerospace Lab [Lille]
- ONERA - The French Aerospace Lab [Palaiseau]
- ONERA - The French Aerospace Lab [Toulouse]
- ONERA | DEMR, Université de Toulouse [Toulouse]
- ONERA | DTIS, Université de Toulouse [Toulouse]
- OPTOEL
- ORIENT ET MÉDITERRANÉE : Textes, Archéologie, Histoire
- OSCILLOQUARTZ
- Observatoire Astronomique de Marseille Provence
- Observatoire Astronomique de l'Université de Genève
- Observatoire aquitain des sciences de l'univers
- Observatoire astronomique de Strasbourg
- Observatoire de Cabris
- Observatoire de Chinon
- Observatoire de Paris - Site de Meudon
- Observatoire de Paris - Site de Paris
- Observatoire de la Côte d'Azur
- Observatorio Astronomico de Valencia
- Observatorio Astronómico de Tradate
- Observatorio Local de Empleo
- Observatório Nacional|MCT
- Observatório do Valongo|UFRJ [Rio de Janeiro]
- Occupational Health Unit
- Ocean Research Institute
- Ocean and Earth Science [Southampton]
- Oceans and Atmosphere Flagship
- Oncologie virale
- Onsala Space Observatory
- Optical Sciences Group
- Optics Laboratory [Tampere}
- Optics Research Group, Department of Imaging Science and Technology, Delft University of Technology, Lorentzweg, Delft, The Netherlands
- Optics and Molecular Materials Laboratory
- Optics, Photonics, Electromagnetism, Radio-Communications and Acoustics
- Optimisation Métabolique et Cellulaire
- Optique Nonlinéaire Théorique
- Optoelectronics Research Center
- Optoelectronics Research Centre
- Optoelectronics Research Centre [Southampton]
- Orange Labs [Cesson-Sévigné]
- Orange Labs [Chatillon]
- Orange Labs [Issy les Moulineaux]
- Orange Labs [Lannion]
- Orange Labs [Paris]
- Origine, structure et évolution de la biodiversité
- Orthopedic, Traumatology, Plastic Reconstructive and Hand Surgery Unit
- Oscilloquartz SA
- Oxford Instrument
- Oxford Radiocarbon Accelerator Unit
- Oxford University
- Österreichisches Archäologisches Institut