Sometimes the information in a data set becomes obsolete and you need to delete the data set. To delete one or more data sets, select the ISPF/PDF UTILITIES option (option 3) from the ISPF/PDF Primary Option Menu.

------------------------  ISPF/PDF PRIMARY OPTION MENU  ------------------------
OPTION ===> 3
                                                              USERID   - YOURID
    0  ISPF PARMS  - Specify terminal and user parameters     TIME     - 12:47
    1  BROWSE      - Display source data or output listings   TERMINAL - 3277
    2  EDIT        - Create or change source data             PF KEYS  - 12
    3  UTILITIES   - Perform utility functions
    4  FOREGROUND  - Invoke language processors in foreground
    5  BATCH       - Submit job for language processing
    6  COMMAND     - Enter TSO command or CLIST
    7  DIALOG TEST - Perform dialog testing
    8  LM UTILITIES- Perform library administrator utility functions
    9  IBM PRODUCTS- Additional IBM program development products
    C  CHANGES     - Display summary of changes for this release
    T  TUTORIAL    - Display information about ISPF/PDF
    X  EXIT        - Terminate ISPF using log and list defaults

Enter END command to terminate ISPF.

You then see the Utility Selection Menu from which you can select options to delete an entire data set or data set members.