The largest publicly available collection of comic books in the United States is housed in the Newspaper and Current Periodical Reading Room. The collection includes U.S. and foreign comic books--over 12,000 titles in all, totaling more than 140,000 issues. Primarily composed of the original print issues, the collection includes color microfiche of selected early comic book titles (such as Superman, More Fun, and Action Comics), bound volumes of comic books submitted by the publishers and special reprints. The collection is most comprehensive from the mid-1940s on; however, many titles date back to the 1930s. For some of the earliest modern comic books (those which began publishing in the 1930s), the collection holdings begin with the early 1940s.