What does SIO mean in Governmental & Military

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All SIO meanings

What does SIO stand for?

SIO stands for "Staged in Orbit"

How to abbreviate "Staged in Orbit"?

"Staged in Orbit" can be abbreviated as SIO

What is the meaning of SIO abbreviation?

The meaning of SIO abbreviation is "Staged in Orbit"

What does SIO mean?

SIO as abbreviation means "Staged in Orbit"