The corporation is a major publisher of religious publications, including books, tracts, magazines and Bibles. By 1979, the society had 39 printing branches worldwide. In 1990, it was reported that in one year the society printed 696 million copies of its magazines, "The Watchtower" and "Awake!" as well as another 35,811,000 pieces of literature worldwide, which are offered door-to-door by Jehovah's Witnesses. As of 2013, the Society prints more than 43 million of its public issues of these magazines each month, totaling over 1 billion annually.