I maybe hold the wrong end of the wire, (sorry. [Linked Image] but I guess the "heart" of a system like that is not in one computer, especially not in the middle of the city.
Normally databases like a bank's are in a remote server room which is not allowed to go in for anyone at all.
At least my company is small, but even our software guy cannot enter to the server room.
But maybe I misunderstood something, then excuse me. [Linked Image]

The world is full of beauty if the heart is full of love