- International Virtual Observatory Alliance
- ArVO, Armenian Virtual Observatory
- AstroGrid, Virtual Observatory United Kingdom
- Aus-VO, Australian Virtual Observatory
- BVO,Brazilian Virtual Observatory
- CVO, Canadian Virtual Observatory
- ESA VO, European Space Agency VO
- EURO-VO, European Virtual Observatory
- GAVO, German Astrophysical Virtual Observatory
- HVO, Hungarian Virtual Observatory
- JVO, Japanese Virtual Observatory
- KVO, Korean Virtual Observatory
- NVO, National Astronomical Observatory, United States
- OV-France, Observatoire Virtuel France
- RVO, Russian Virtual Observatory
- SVO, Spanish Virtual Observatory
- IVO,Italian Virtual Observatory
- VO-India, Virtual Observatory India
- Virtual Observatory Forum
- Web Services for the Virtual Observatory
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