What does VOS stand for?
VOS stands for "Voluntary Observing System"
How to abbreviate "Voluntary Observing System"?
"Voluntary Observing System" can be abbreviated as VOS
What is the meaning of VOS abbreviation?
The meaning of VOS abbreviation is "Voluntary Observing System"
What does VOS mean?
VOS as abbreviation means "Voluntary Observing System"
