Payame Noor University (PNU) (Persian: دانشگاه پیام نور) is a public university system and one of the largest universities in Iran, and a mega university in world, with its headquarters in Tehran, 31 provincial centers, 500 local study centers, other campuses around the country, and an International Study Center located in the headquarters in Tehran. Established in 1988, is a legal body under the Ministry of Science, Research and Technology.