PNU can stand for:
Education Payame Noor University, Tehran, Iran headquarters and 500+ locations worldwide Pacific National University, Khabarovsk, Russia Philippine Normal University, Manila, Philippines Precarpathian National University, Ivano-Frankivsk, Ukraine Princess of Naradhiwas University, Narathiwat, Thailand Princess Nora bint Abdul Rahman University, Riyadh, Saudi Arabia Pusan National University, Busan, South Korea
Other uses Party of National Unity, a Kenyan political party Penrith Nepean United, an association football club in New South Wales, Australia Protein nitrogen unit, a measure of the potency of the compounds used in allergy skin tests