Mostly written in PL/1, I describe some of them
Programm APPTDD10 Online, uses CICS + DB2 + PL/1
Programm APPTIND Online, uses CICS + VSAM + PL/1
Programm DDREP01 Batch, uses PL/1 + DB2
Programm DK553V2 Batch, uses DB2 + IMS + PL/1
Programm NPK1 Routine, PL/1 and Pointers