Library /sys$common/syshlp/PCA$HELP.HLB  —  User Routines, Usage
    For information on specifying collection with user routines enter
    the following commands:

  $ PCA
  PCAA> HELP SET SERVICES /NOUSER_ROUTINE
  PCAA> HELP SET SERVICES /USER_ROUTINE
  PCAA> HELP SET IO_SERVICES /NOUSER_ROUTINE
  PCAA> HELP SET IO_SERVICES /USER_ROUTINE
Additional Information: explode extract
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