O was the name of an international fetish magazine published in Germany by Peter W. Czernich. It was published both in German and English. The last issue, O No. 25, was published in the summer of 1995. O magazine was followed by Marquis magazine.
The name comes from the French sadomasochistic novel Story of O.
The magazine was notably in a trademark dispute with Oprah Winfrey and Hearst Magazines over their O: The Oprah Magazine title.[1]