1953. In 1951, Lindenberg partnered with Antonio Quirino, brother of then-Philippine president Elpidio Quirino, to try television broadcasting. In 1952, BEC was renamed Alto Broadcasting System or ABS (with Alto Sales Corporation as its corporate name). Alto was a contraction of Quirino's and his wife's first names, Tony and Aleli. Despite little money and resources, ABS was able to put up its TV tower by July 1953 and imported around 300 television sets. The initial test broadcasts began in September of the same year. The very first full-blown broadcast was on October 23, 1953, at a party in Quirino's home. The first program to air was a garden party at the Quirino residence in Sitio Alto, San Juan. After the premiere telecast, the station followed a daily four-hour schedule from 6:00 to 10:00 PM. ABS-CBN's first television broadcast was on October 23, 1953, as Alto Broadcasting System (ABS) on DZAQ-TV, three months after the first broadcast of Japan's NHK General TV and Nippon Television. It is the first television network in Southeast Asia to broadcast in color, the first television network in the Philippines to formally launch a digital terrestrial television service, and the first broadcast television network in the Philippines to formally launch in HD. The flagship television station of ABS-CBN was DWWX-TV (ABS-CBN TV-2 Manila). As such, the network was informally referred to as "Channel 2" or "dos" (Spanish for two) even if the network was seen in other channel numbers elsewhere in the country. The network operated across the Philippine archipelago through the ABS-CBN Regional division which controlled 80 television stations. Its programs are also available outside the Philippines through the global subscription television channel The Filipino Channel (TFC). From 2011 to 2020, the network had been on test broadcast for digital terrestrial television using the Japanese standard ISDB-T in select areas in the Philippines. On October 3, 2015, ABS-CBN started to broadcast in high-definition quality through its affiliate direct-to-home cable and satellite television providers. Branding The ABS-CBN logo features three main elements: the vertical line rooted in a horizontal origin, the three extending circles, and the text ABS-CBN. ABS-CBN's logo also has a horizontal version, usually used to save space as the main vertical logo usually takes up more space. The design of the horizontal version of the logo contains the ABS-CBN text, split into two parts, "ABS" and "CBN", without the dash connecting them, and