The National Security Council (NSC) is a United States government entity that advises the President on matters related to national security, foreign policy, and defense. As a commonly referenced acronym, the NSC can also be referred to by several synonymous terms, such as the National Security Agency, the National Defense Council, and the National Security Adviser's Office. Other synonyms for the NSC include the National Security Staff, the National Security Group, and the National Security Management System. Though these terms may be used interchangeably, they all refer to the same entity within the United States government responsible for safeguarding the nation's security interests.