It's more likely that the code and whatever was used for the DB dates from the 1960s-70s (likely a mixture of COBOL, JCL, and who knows what else), and has fixed-width columns for the data fields, with the password configured to something small.

I'd say most if not all of this code is probably running on some IBM mainframe from the 1980s or 90s - possibly later - and likely in some kind of emulation or backwards compatibility mode (so something from the 80s/90s would likely allow for running S/360 stuff, and so forth).

The actual hardware, though, has either been scrapped or is in a museum somewhere. There are very, very few instances of organizations still running "ancient" hardware (though the few that are tend to be known by the mainframe collecting community from what I understand).