1. SDSF – System Display and Search Facility
2. SUBSYSTEM – TSO(Time Sharing Option) / SMF (Storage Management
Facility) / CICS
3. TELECOMMUNICATION – BTAM /
TCAM / VTAM
4. IMS – IMSDB /
IMSDC
5. DB2
6. Security – RACF (Resource Access Control Facility) / System
Libraries (SYS1.NUCLEOUS / SYS1.LINKLIB / SYS1.SVCLIB
