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Ask people maintaining critical legacy stuff and you'll find: in amazingly many places: banks, planes, public transport...
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Legacy systems are all over the place. It's simply not cost effective to upgrade to the latest and greatest every 2 years or whatever. As long as the system is doing what's required of it, there's no reason to break what's already working. The upside of that is you can make a load of money if you know how to perform maintenance on those systems.
Nice find by the way! It'll serve you well -
@trollonaboat
Pretty sure in the old days people just write architecture proof Fortran code. Cuz I still use lots of subroutines date back to f77 for my work, and have to deal with binary operations which makes it less readable.
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So the Computer Science departent at my university has a shelf where people can give away technical books they don't need anymore. I found a giant UNIX system administration book from 1995 there the other day, and i am blown away by how many useful things i could find in such an old book; basically all of the unix flavours mentioned are long dead (with the exception of bsd and linux ofc), and so is 99% of the software, but all of the core concepts and basic tasks still hold true in 2018... Isn't that amazing? :D Where else can you find a system that still works the same after 23 years?
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