When I set up the Stock Options system at Netscape (as the Desktop Support guy) back in 1997, It consisted of two computers, connected to each other via a switch, in a Locked room, with a wall all the way to the ceiling to reduce false-ceiling access, with that room also located inside the Secure Legal Office Space.   Systems were backed up daily by the users, using encrypted backups to Zip Drives.<p>It&#x27;s interesting how when you don&#x27;t know what the hell you are doing, you sometimes do something reasonably secure by pure happenstance.  (Also, I had probably read too much Bruce Schneier when I was a teenager.)