I got a copy of the Fedora Core 5...
Can anyone at least share a bit what were the improvements from version 4..?

I heard Debian can support a process for a single processor-multiple user system...

But it's not the superior open OS...

well, core 5 has improved on configuration management, with other versions, if you configured lets say the network on the gui, and later tried using the command line, then, PROBLEMS! also an improvement on software upgrade or installation after first install. Oh! plus a bubbly screen saver. +++++++ so many things have changed.