GMA Network (an acronym of its legal name, Global Media Arts and commonly known as GMA) is a Philippine commercial broadcast network, serving as the flagship property of publicly traded GMA Network Inc. The network is headquartered in the GMA Network Center in Quezon City and its transmitter facilities, Tower of Power, are located at Tandang Sora Avenue, Barangay Culiat also in Quezon City with regional stations and offices strategically located in over 12 major cities across the country including Dagupan, Naga, Bacolod, Iloilo, Cebu and Davao. GMA Network (formerly known as Republic Broadcasting System, GMA Radio-Television Arts and GMA Rainbow Satellite Network) is commonly referred to as the Kapuso Network in reference to the outline of the company's logo; the branding was originally introduced in 1992 and was officially introduced on October 27, 2002 during an episode of its now-defunct noontime variety show SOP. GMA Network is one of the largest television and radio network in the Philippines, along with TV5 and ABS-CBN/A2Z.