What does ORB stand for?

MLA style: "ORB." Acronym Finder . 2013. AcronymFinder.com 18 May. 2013 http://www.acronymfinder.com/Operation-Request-Block-(ORB).html
Chicago style: Acronym Finder . S.v. "ORB." Retrieved May 18 2013 from http://www.acronymfinder.com/Operation-Request-Block-(ORB).html
APA style: ORB. (n.d.) Acronym Finder. (2013). Retrieved May 18 2013 from http://www.acronymfinder.com/Operation-Request-Block-(ORB).html

Operation Request Block

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