Opar or OPAR may refer to: Opar (fictional city), a fictional lost city in Edgar Rice Burroughs's series of Tarzan novels Opar (state constituency), a state constituency of Malaysia Opar, Albania OPAR L'Orientale Open Archive, the institutional repository of the University of Naples, Italy Objectivism: The Philosophy of Ayn Rand, a book by Leonard Peikoff GTRI Office of Policy Analysis and Research, a think tank at the Georgia Tech Research Institute See also