T J Tulley wrote: and note that Cassandra 3.0 which I selected for installation is described as having Feisty innovations (but KDE isn't mentioned)
Ubuntu "Feisty Fawn" 7.04 has GNOME as its default desktop, not KDE. The version with KDE as its default desktop would be Kubuntu 7.04 ... Nontheless you can e.g. install GNOME on Kubuntu and KDE on Ubuntu if you so wish. But the reason why KDE isn't mentioned is simply because KDE is not part of the Ubuntu default distro and Cassandra 3.0 (not to be mistaken with the "KDE Community Edition" of Mint) is GNOME-based too.
T J Tulley wrote: I gather that Feisty Fawn was something of a landmark.
It's kind of a tradition that e.g. Debian releases are named characters from the animated movie "Toy Story".http://en.wikipedia.org/wiki/Debian#Debian_releases
Canonical Ltd. selected similar fancy names for their Ubuntu releases (which are based on Debian).
T J Tulley wrote: If I R-click Cassandra at bottom L of screen, and select About, I see that it is the Gnome-like mintMenu 2.3 - no mention of Cassandra!
Why should Cassandra need to be mentioned everywhere?
T J Tulley wrote: So just what is the significance of KDE (presumably an acronym)
KDE and GNOME are desktop environments for UNIX-like operating systems. Some dislike GNOME and thus choose KDE, some dislike KDE and thus choose GNOME. Some dislike both of them and therefore choose XFCE or Enlightenment, or WindowMaker, or FluxBox, or something else ... De gustibus non est disputandum.http://en.wikipedia.org/wiki/Kdehttp://en.wikipedia.org/wiki/GNOMEhttp://en.wikipedia.org/wiki/Xfcehttp://en.wikipedia.org/wiki/Enlightenment_%28window_manager%29http://en.wikipedia.org/wiki/Window_Makerhttp://en.wikipedia.org/wiki/Fluxbox
T J Tulley wrote: Obviously most people here are familiar with these things, but I've come in very green.
Wikipedia is your friend
T J Tulley wrote: I'm trying to find the Bookmarks folder of Firefox
Bookmarks file ... not folder. It's usually called bookmarks.html
on UNIX-like OS, maybe bookmarks.htm
on Windows (not sure here). They are however compatible and can be exchanged and swapped at will. Just place them into the right folder. On UNIX-like OS such as Linux this would be e.g. underneath the ~/.mozilla/firefox/
folder structure in your $HOME directory.