What does FCOS stand for?

abbreviation to define

		If you haven't already, we suggest you try Acronym Finder first! Acronym Finder has 6 verified definitions for FCOS Our 'Attic' has 5 unverified meanings for FCOS

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Possible Meanings	Rank
Flight Computer Operating System	**
First Church of Simba	**
First Class Office Space	**
First Church of Shatnerology	**
Flight Control Operational Software	*

Note: Acronym Finder has 6 verified definitions for FCOS