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Sam_w
It's amazing how much IT stuff that may be presented as a very swishy iPhone app (e.g. phone banking apps) are actually backended by layers and layers of increasingly old and crufty goblinry.
Somewhere there's probably a pair of ancient Tandem mainframes lurking in a basement that the bank is just praying will continue to work without problems, and things like transaction IDs are actually screen scraped from TN3270 sessions by hardware that is older than every bank employee.
Or stuff like the SABRE airline reservation system.
*shudder*