[tyingq]

All the surrounding ecosystem for batch scheduling (JCL, Tivoli), databases (IDMS, IMS, Adabas, DB2, etc), something like what we would call an app server (CICS), role based access control (RACF), and others I've missed.

[nsxwolf]

And there's file system stuff: https://stackoverflow.com/questions/28640159/what-is-the-dif...

[tyingq]

Ah, yep. The original nosql. Variable and fixed length record based storage, that comes with the OS.

[p_l]

The parts that are standardised in COBOL (k/v storage) are implemented in GNU COBOL using gdbm/Berkeley DB.