Once upon a time, Linux was installed from a stack of floppy
disks—thankfully cassette tape “drives” were long in the past at that
point—but floppies were superseded by optical media, first CDs and then
DVDs. These days, those options are starting to fade away in most new
computer systems; just as it is now rather hard to find a floppy-based Linux
installer, not to mention the media and drives themselves, someday optical
media installation will disappear as well. For Fedora, that day has not truly
arrived, though a somewhat confusingly presented proposal on the Fedora
devel mailing list is, to a limited extent, a step in that direction.

Source: LWN.net – [$] Fedora and optical media testing