fatmanmedia
I hate to scare you all, but the operating system used by nats is the same used by the banks for dealing with accounts, the banks are using hardware that is even older than nats and a lot less reliable, one bank has a number of main frames that are coming up to their 50th birthday.
Fats
What rubbish.
Which operating system is it?
How about naming the bank?
What make of mainframe? Do you really believe that there would be any maintenance available for machines that old?