Also called Superboy & the Legion of Super-Heroes
First Issue #1 - March 1949
Last #258 - December 1979
Continued in Legion of Super-Heroes (1980 series)
These are the adventures of Clark Kent as Superboy. In the Superman mythology from 1939 to 1986, Clark Kent became a super-hero as a youngster, and these are his adventures. But in 1987, DC comics changed the mythology of Superman and he only became a super-hero as an adult. In the current Superman mythology, Superboy (that is, Clark Kent) as a young Superman, does not exist. Instead, the post-1987 Superboy is an alien.