Yeh, I know someone, is a friends Father, who is past retirement and getting paid a very healthy retainer to maintain a well known inter banking transaction system. He cut his teeth during the 60s / 70s. I would guess COBOL and pretty sure Fortran was mentioned also, was a while back we last spoke.

Yeah I can see that, both COBOL and Fortran are one of those programming languages that a small number of developers actually want to work on nowadays. Ironically that's why they're paid so well