DB/2 is used quite extensively. But a lot of things are still flat files. On System I you can access DB/2 databases as if it were flat files as well. Not actual

DB/2 is used quite extensively. But a lot of things are still flat files. On System I you can access DB/2 databases as if it were flat files as well. Not actually useful if you ask me but I suppose useful when the developers didn't know SQL. I'm on my phone so explaining how it works is a hassle. Endevor for version control on Z/OS.