Do you remember when desktop computers were so large that they had to go under (or to the side of) the desk Oh wait; most of them still are still that large. The HP EliteDesk 800 G1 , however, is an exception.
Extremely small CPU that can be mounted or placed almost anywhere; powerful and upgradeable; a total of six USB 3.0 ports; can handle up to three external displays
You have to provide your own monitor, keyboard, and mouse; no digital drive (for those who haven't weaned themselves off of them yet