CCM AC chart was an adult contemporary chart that was originally started by CCM Magazine in 1978. According to author Jeffrey Lee Brothers in his book Hot Hits: AC Charts 1978 – 2001, "When CCM published music charts, it received data from a specific number of radio stations regarding the number of times a song was played. This airplay data was then assigned points and weights based on the cumulative number of plays per song. The result was a weekly chart that ranked the most played, and presumably, most popular songs. The AC charts have long covered the most radio stations in the Christian music industry. The charts themselves have gone through several changes over the years. When CCM first published its radio hits charts, AC was not a recognized format. What is today considered adult contemporary was then covered under the title of contemporary hits. On September 30, 1981 CCM published its first AC chart, but only for a year. CHR (Contemporary Hit Radio) and AC merged again on October 6, 1982 until CCM split them again on May 6, 1985 to reflect the current formats."[1][2]
