[Koha] squeeze vs. main

Hello everyone, I have found a discrepancy in the documentation, this page (http://download.koha-community.org) says to use: deb http://debian.koha-community.org/koha squeeze main And the wiki page (https://wiki.koha-community.org/wiki/Debian) says: deb http://debian.koha-community.org/koha stable main What is the difference between "squeeze" and “main”? Thank you, FV