What is the abbreviation for information operations? 

information operations

Information Operations is a category of direct and indirect support operations for the United States Military. By definition in Joint Publication 3-13, "IO are described as the integrated employment of electronic warfare (EW), computer network operations (CNO), psychological operations (PSYOP), military deception (MILDEC), and operations security (OPSEC), in concert with specified supporting and related capabilities, to influence, disrupt, corrupt or usurp adversarial human and automated decision making while protecting our own." Information Operations (IO) are actions taken to affect adversary information and information systems while defending one's own information and information systems. In the U.S. Navy, information operations are often supervised by a Navy Information Operations Command (NIOC), for example in the United States Tenth Fleet which has several NIOCs.

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