Oregon Public Broadcasting (OPB) is the primary television and radio public broadcasting network for most of the U.S. state of Oregon as well as southern Washington. OPB consists of five full-power television stations, dozens of VHF or UHF translators, and over 20 radio stations and frequencies. Broadcasts include local and regional programming as well as television programs from the Public Broadcasting Service (PBS) and American Public Television (APT), and radio programs from National Public Radio (NPR), Public Radio International (PRI), American Public Media (APM), Public Radio Exchange (PRX), and the BBC World Service, among other distributors. Its headquarters and television studios are located in Portland.