Hi 'Bren, nice to see ya again!
Sorry for the ambiguous "Pizza Box" term without an explaination
"Pizza Box" is a kind of antiquated slang term for a Desktop Computer with a thin Case.
The ones which are physically ½ the size of a "Standard" Desktop Machine's Case.
Definitely not mistaken for any "Tower" Case model - "Mini" to "Full" / "Server" Case size.
Also, looks almost like a Pizza Box! (use of imagination for this will help!).
All the "Pizza Boxes" I have owned had "Bus Risers" for expansion bus use, rather than individual expansion bus slots mounted directly on the M. Board.
Anyhow, thanks for the message!!!
Scott35