- Harvard Medical School [Boston]
- Harvard University
- Health Regional Agency [Cayenne]
- HEC Montréal
- Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research
- Helsingin yliopisto = Helsingfors universitet = University of Helsinki
- Herbier de Guyane - IRD
- Hétérocycles et Peptides