Allow me to educate our fellow non-comic readers.
Back in 1986, DC Comics decided to re-boot their major franchise heroes (Superman, Batman, Wonder Woman) as well as most of their line. It was done with the 12 part series, Crisis on Infinite Earths. After that series ended, the "origins" of many heroes had changed. Being their main character, Superman received a 6 issue mini-series reboot from then hot creator John Byrne. This series was called The Man of Steel.
http://en.wikipedia.org/wiki/The_Man...8comic_book%29
Following that series, a new Superman series was set to be launched, but DC did not want to discontinue the numbering of the old Superman series. It was #423. Without checking, I think Detective Comics was the only other series close to that. However, they wanted to start Superman over to reflect the major change in the character and direction (Ma and Pa Kent alive, Luthor now a businessman, less powerful).
Enter the Adventures of Superman.
http://en.wikipedia.org/wiki/Adventures_Of_Superman
This series "took over" the numbering of the Superman series and a new Superman series was launched as Vol. 2, Issue #1.
This numbering lasted until a few months ago when on the 20 Year Anniversary of Crisis on Infinite Earths, DC launched Infinite Crisis. This once again revamped their entire line, although not as drastically. Issue #649 of Adventures of Superman would be its last. As of #650, the title returned to just Superman. The rebooted Superman title ended with issue #226.
Sadly, I knew all of this (except a few issue numbers) from memory. I'm a comic geek first, cartoons second.