a project by e_bischoff
The purpose would be to have the equivalent of Ubuntu's "apt-get autoremove" functionality. When you install package P, it might draw in dependancies D1, D2, ... Dn automatically.
a project by mlandres
Packages added by the dependency solver in order to resolve a user's request, are marked as having been automatically installed. They may later be removed, if no more manually installed packages depend on them (e.g. by zypper remove --clean-deps). However things may go haywire. Automatically installed packages may turn out to be useful, and you may want to exclude them from any automatic cleanup. And vice versa.