1) Data Communication Fuctions
Interface between CICS and terminals, To Interface Telecommunication access methods. To free application programs from the terminal hardware.
2) Data Handling Functions
Interface between the CICS and Data, To Interface with data access methods -VSAM, To Interface with databases Access Methods - DB2.
3) Application Programming Services
Interface between the CICS and Application Program (COBOL)
1) Command level translator,
2) Execution diagnestic facility(EDF).
3) Command interpreter(CECI).
4) System services
1)Interface between the CICS and Os,
2)Program Control(Load, RELEASE)
3)storage Control
4)Task Control
5) Monitoring Functions
1) Monitor various events within CICS.
2) Provides statistics to be used for system tuning.
3) Offline program DFHSTUP can be used for statistics informations.
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