| Acronym | Definition |
|---|
| OSIRIS | Optical, Spectroscopic, and Infrared Remote Imaging System (European Space Agency) |
| OSIRIS | Observatoire sur les Systèmes d'Information, les Réseaux et les Inforoutes au Sénégal (French: Observatory on Information Systems, Networks and Information Highways in Senegal; Senegal) |
| OSIRIS | Optical Spectrograph and InfraRed Imaging System (Canada) |
| OSIRIS | Origins Spectral Interpretation, Resource Identification and Security (US NASA) |
| OSIRIS | Optical Scattering Instantaneous Respirable Dust Indication System |
| OSIRIS | Optimized Synthetic Infrared Interactive Simulation |