Detective Comics
Detective Comics is an American comic book series published by DC Comics. The first volume, published from 1937 to 2011 (and later continued in 2016), is best known for introducing the superhero Batman in "Detective Comics" #27 (cover dated May 1939).
Comic strip syndication
Comic strip syndication services began operating in the opening years of the 20th century. The first syndicate to distribute comic strips was the McClure Newspaper Syndicate (founded in 1884), which began syndicating comic strips circa 1901. (McClure's more notable strips included "Billy Bounce", by W. W. Denslow and later by C. W. Kahles, (1901–1906); "Superman", which it syndicated beginning in 1939; and "Batman and Robin", debuting in 1943.)