The United Nations Office of Internal Oversight Services (OIOS) is a United Nations organ whose primary purpose is to perform world-wide audit, investigation, inspection, programme monitoring, evaluation and consulting services to the United Nations Secretariat and the rest of the United Nations System. (External Link) Its intended and mandated function is similar to many national government audit organisations, like the Government Accountability Office in the United States. And like most of it… (More on Oios)