https://en.wikipedia.org/wiki/Direct_Currents


 Quote:
Direct Currents was first used as the name of a text feature appearing in DC's comics beginning in 1966.[1]
In the 1970s, the feature appeared in DC's fan magazine The Amazing World of DC Comics.[1]
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. The phone number was so popular (it was
receiving an average of 100,000 calls a week toward its end) that it had to be shut down due to strain on the telephone
system.[2]

Beginning in 1978 and lasting a little more than a year,[3] Direct Currents was the name for a one-page newsletter.[1]
The newsletter, which was available by subscription, featured a 13" by 18" poster cover.[4]


[ Not listed, from July 1978-1984, the newsletter was called DC COMING ATTRACTIONS.

And 1984-1988, a mostly black-and-white or one-color 8 X 11 4-page newsletter titled DC RELEASES. ]



In 1988, Direct Currents became the title of a free monthly newsletter distributed by comic book stores, containing
articles about DC Comics titles being released that month as well as a checklist of the month's new releases. It was a
replacement for DC's previous newsletter, DC Releases.[1]
Unlike DC Releases, which was printed in black and white and magazine-sized, Direct Currents was printed in color and was
the size of a regular comic book. Eventually, Direct Currents contained a flipbook format, with one side containing
features about DC Universe titles, and the other containing features about titles from DC's Vertigo and Paradox Press
imprints.[5] The newsletter ran for a total of 92 issues, ending in 1995, and also produced two specials.

Beginning in November 2016, the name was used for a free quarterly magazine offering sneak peeks of every DC title.[6]
However, the book was cancelled after only one issue.[7]