Software

In the early 2000 IBM introduced z/OS, a 64-bit operating system for mainframe computers. MVS followed by OS/390 and now z/OS offers the attributes of modern operating system and yet provides backward compatibility to the older operating system. z/OS supports mainframe staple technologies such as CICS, IMS, DB2, RACF, SNA, WebSphere MQ, REXX, CLIST, SMP/E, JCL, TSO/E, and ISPF.

z/OS 2.2

CICS V4

RACF

DB2 V12

IBM COBOL 6.1

JES2

PL/1

DFSMS/MVS

TSO/E

ICKDSF R17

ISPF

EREP/MVS V3 R5

HIGH LEVEL ASSEMBLER V4. R0

DFDSS

SMP/E

SDSF