 In the 1970s, the feature appeared in DC's fan magazine "The Amazing World of DC Comics".From the late 1970s to the early 1980s, the name was also used for one of the features in DC's "Daily Planet" house ads.From November 1976 to July 1977, DC had its own toll-free phone number called the Direct Currents Hot-Line, where fans could hear pre-recorded messages from DC staff about upcoming titles.