Many companies still run production, warehousing, orders and invoicing on a business system that has been going for twenty years or more on an AS/400. Today that platform is called IBM i (it went from AS/400 to iSeries, System i and finally IBM i), but the name almost everyone still uses is the ...
Source: [Dev.to](https://dev.to/custralis/modernising-a-legacy-as400-ibm-i-system-without-rewriting-it-4k9k)