The ABC logo has evolved many times since the network's creation in 1943. The network's first logo, introduced in 1946, consisted of a television screen containing the letters "T" and "V", with a vertical ABC microphone in the center, referencing the network's roots in radio. When the ABC-UPT merger was finalized in 1953, the network introduced a new logo based on the seal of the Federal Communications Commission, with the letters "ABC" enclosed in a circular shield surmounted by the bald eagle. In 1957, just before the television network began its first color broadcasts, the ABC logo consisted of a tiny lowercase "abc" in the center of a large lowercase letter a, a design known as the "ABC Circle A".
Who did ABC merge with?