Beautiful music (sometimes abbreviated as BM, B/EZ or BM/EZ for "beautiful music/easy listening") is a mostly instrumental music format that was prominent in North American radio from the late 1950s through the 1980s. Easy listening, elevator music, light music, mood music, and Muzak are other terms that overlap with this format and the style of music that it featured. Beautiful music can also be regarded as a subset of the middle of the road radio format. History Beautiful music initially offered soft and unobtrusive instrumental selections on a very structured schedule with limited commercial interruptions. It often functioned as a free background music service for stores, with commercial breaks consisting only of announcements aimed at shoppers already in the stores. This practice was known as "storecasting" and was very common on the FM dial in the 1940s and 1950s. Many of these FM stations usually simulcast their AM station and used a subcarrier (SCA) to transmit a hitch-hiker signal to a store receiver by subscription. The signal was usually a slow-moving audio tape of "background music" or Muzak-type service, which was independent of the simulcast AM signal. Some FM stations made more income from these music subscriptions than from their main programming. WITH-FM, in Baltimore, Maryland (1950s and 1960s), had to keep its FM carrier on the air until 2:00a.m. for restaurant subscribers, and could not sign-off the main FM carrier until that time and thus had to run a repeat of its previous day's evening concert on its main FM program line. Growth as a radio format One of the first beautiful music radio stations in the US was KIXL in the Dallas-Ft. Worth, Texas, area. As early as 1947 it played orchestral music on AM radio (1040), and later on FM (104.5). KIXL changed to KEZL (as in "easy listening") in 1973, but ended with a change to adult contemporary in 1976. In 1959, Gordon McLendon, who had interests in Top-40 radio in Dallas as well as other markets, decided to "counter-program" in San Francisco since several Top-40 stations were already there. McLendon established beautiful music AM station KABL (a tribute to the San Francisco cable cars, named by McLendon's executive assistant Billie Page Odom) which was successful through the 1990s. It then experimented with combining elements of Big Bands and soft rock until its demise in the early 21st century. It was reborn as an Internet radio