Soap opera soap opera "Guiding Light" (originally titled "The Guiding Light" until 1975) started as a radio drama in January 1937 and subsequently transferred to television in June 1952. With the exception of several years in the late 1940s, during which creator Irna Phillips was involved in a dispute with Procter & Gamble, "Guiding Light" was heard or seen nearly every weekday from 1937 until 2009, making it the longest story ever told in a broadcast medium. Originally serials were broadcast as fifteen-minute installments each weekday in daytime slots. In 1956, "As the World Turns" and "The Edge of Night", both produced
The Soap Opera Encyclopedia (Schemering book) and characters. Schemering also includes a "Short History of Television Soap Opera," as well as profiles of major performers, writers and producers in the genre in a section entitled "Who's Who in Soap Opera." Finally, the book contains 30 pages of photos from various programs. Published in a time before the internet, the "Encyclopedia" was a primary source of background information and commentary on soap opera; it and Schemering have been quoted in various articles, books and web pages. It was revised and reprinted in 1987 () and 1988. According to the "Encyclopedia", Schemering "spent fifteen years collecting memorabilia and