KWOS debuted, as KLIK in 1954. In 1999, the station swapped call letters with an existing station on AM 1240, becoming KWOS.
The KWOS call sign referenced an earlier Jefferson City radio station, WOS, that was set up by Missouri Agriculture Commissioner Jewell A. Mayes to facilitate agricultural commerce.[3] WOS was first licensed on February 23, 1922,[4] and was deleted on March 27, 1936.[5] The original KWOS (1240 AM) was established in 1937, operating with 250 watts and featuring programming from Mutual Broadcasting System. From the 1950s until the mid-1970s, KWOS carried a Top 40 music format. KWOS also formerly carried St. Louis Cardinals baseball games for 68 years from 1938 until 2006.[6]
