AVID:1956/May

{| class="wikitable sortable" style="text-align: center; width: 75%; height: 75%;" ! # ! Logo image ! Company name ! data-sort-type=usLongDate | Debut date ! Country
 * - style="background-color:#7DB2FB"
 * 1
 * Granada (1967) (From - Coronation Street).png
 * Granada Productions
 * style="background-color:#f8f9fa" rowspan="2"|May 3
 * Flag of the United Kingdom.svg United Kingdom
 * - style="background-color:#7DFAFB"
 * 1
 * Granada (1956-1964).jpg
 * Granada Television
 * Flag of the United Kingdom.svg United Kingdom
 * - style="background-color:#7DFAFB"
 * RTZ (1956-1980's?).png
 * RTZ
 * style="background-color:#f8f9fa"|May 15
 * Flag of Yugoslavia.svg Yugoslavia
 * - style="background-color:#7DFAFB"
 * 4
 * Abc1957.png
 * ABC
 * style="background-color:#f8f9fa"|Unknown
 * Flag of the United States (1912-1959).svg United States
 * Flag of the United States (1912-1959).svg United States