Batman (originally referred to as the Bat-Man and still referred to at times as the Batman) is a fictional comic book superhero co-created by artist Bob Kane and writer Bill Finger (although only Kane receives official credit) and published by DC Comics. The character first appeared in Detective Comics #27 (May 1939). Batman's secret identity is Bruce Wayne, a wealthy industrialist, playboy, and philanthropist. Witnessing the murder of his parents as a child leads him to train himself to physical and intellectual perfection and don a bat-themed costume in order to fight crime. Batman operates in the fictional Gotham City, assisted by various supporting characters including his sidekick Robin and his butler Alfred Pennyworth, and fights an assortment of villains influenced by the characters' roots in film and pulp magazines. Unlike most superheroes, he does not possess any superpowers; he makes use of intellect, detective skills, science and technology, wealth, physical prowess, and intimidation in his war on crime.