Our company is currently doing the following (very successfully): 1) Our mission critical application (encompassing order entry through to general ledger including manufacturing operations) is running on an HP3000 Micro/XE while I am setting up our new 918LX. 2) We have 5 or 6 (I can't remember which) HP-UX workstations running a HP's cad program ME-10. One of these is acting as a file server for all of our workstations, PC's and Macs. The HP3000 machine seems better at handling high volume transaction processing. It is also extremely reliable. This is why we choose it to run our main application. The unix boxes are much better with graphics (cad) and seem to do very well with serving our network. E-mail me if you want more specifics or to talk with our Engineer who has set up this entire network. Good Luck!