DBG_1> PTHREAD HELP
      conditions [-afhwqrs] [-
 N <n>] [id]...: list condition variables
      exit: exit from DECthreads debugger
      help [topic]: display help information
      keys [-v] [-N <n>] [id]...: list keys
      mutexes [-afhilqrs] [-N <n>] [id]...: list mutexes
      quit: exit from DECthreads debugger
      show [-csuv]: show stuff
      squeue [-c <n>] [-fhq] [-t <t>
  ] [a]: format queue
      stacks [-fs] [sp]...: list stacks
      system: show system information
      threads [-1] [-N <n>] [-abcdfhklmnor] [-s
   <v>] [-tz] [id]...: list threads
      tset [-chna] [-s <v>] <id>
  : set state of thread
      versions: display versions
      write <st>: write a string
  All keywords may be abbreviated: if the abbreviation is ambiguous,
  the first match will be used. For more help, type 'help <topic>'.
  DBG_1>

      This command invokes the POSIX threads debugger help file,
      then returns control to the OpenVMS debugger. To get specific
      help on a POSIX threads debugger Help topic, type PTHREAD HELP
      topic.