WLS is a pioneer Chicago radio station. The call letters stand for World's Largest Store after its original owner, Sears, Roebuck. The station operates on an AM frequency of 890. It is now owned and operated by the radio division of the American Broadcasting Company.
Sears opened the station in 1924 as a service to farmers and subsequently sold it to the Prairie Farmer Magazine, which continued that orientation through 1960. It was the scene of the American Barn Dance, which featured Gene Autry, Pat Buttram, and George Gobel, and which was second only to the Grand Ole Opry in presenting country music and humor.
The station also experimented successfully in many forms of news broadcasting, including weather and crop reports. Its most famous news broadcast was the report of the Hindenburg disaster by Herbert Morrison.