ISOO meaning in Governmental ?

Answer: What is Information Security Oversight Office mean?

The Information Security Oversight Office (ISOO) is responsible to the President for policy and oversight of the government-wide security classification system and the National Industrial Security Program in the United States. The ISOO is a component of the National Archives and Records Administration (NARA) and receives policy and program guidance from the National Security Council (NSC).

reference

Full Form	Category
Information Security Oversight Office	Governmental
International Society of Ocular Oncology	International
International Society of Oral Oncology	Medical