What about know about Google O.S?

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Hello mylotters, yesterday myself and my friends were discussing about the google O.S in the street corner.one of my friend told that 90% of the work was completed .But I don't beleive that ,So you people know anything about google O.S.Is Google ever officially announced anything about O.S. In case if google release O.S ,how many of you move to Google O.S.