Command_Qualifiers

/CARRIAGE_CONTROL
  /CARRIAGE_CONTROL
  /NOCARRIAGE_CONTROL

  Determines whether carriage control characters or line feed
  characters, or both are prefixed to the DCL-prompt string of
  the subprocess. The default is the current setting of the parent
  process.

/CLI
  /CLI[=cli]
  /NOCLI

  Specifies an alternate command language interpreter (CLI) for the
  subprocess to use. The default is the CLI the parent process uses.

  The CLI you specify must be located in SYS$SYSTEM and have the
  file type .EXE.

/INPUT
  /INPUT=file-specification

  Specifies an input file containing one or more commands for the
  spawned subprocess to execute. If you specify a command with an
  input file, the command is processed before the commands in the
  input file. The subprocess terminates when processing is complete.
  You cannot use wildcards in the file specification.

/KEYPAD
  /KEYPAD (D)
  /NOKEYPAD

  Determines whether DCL keypad symbols and the current DCL keypad
  state are copied from the parent process to the subprocess. Use
  the /NOKEYPAD qualifier if you do not want the key settings to be
  copied.

/LOGICAL_NAMES
  /LOGICAL_NAMES (D)
  /NOLOGICAL_NAMES

  Determines whether the system passes process logical names and
  logical name tables to the subprocess, except those marked CONFINE
  or those created in executive or kernel mode.

/NOTIFY
  /NOTIFY
  /NONOTIFY (D)

  Determines whether a message is sent to your terminal to notify
  you that your subprocess has been completed or aborted. You must
  specify the /NOWAIT qualifier with the /NOTIFY qualifier.

/OUTPUT
  /OUTPUT=file-specification

  Specifies the output file to which the output of the SPAWN
  operation is to be written. If you specify the /NOWAIT qualifier,
  use the /OUTPUT qualifier to specify an output other than
  SYS$OUTPUT to prevent your terminal from being used by both
  processes simultaneously. The default is to direct output to the
  current SYS$OUTPUT device.

/PROCESS
  /PROCESS=subprocess-name

  Specifies the name of the subprocess to be created. The default
  name for the subprocess is USERNAME_n (where n denotes a unique
  number).

/PROMPT
  /PROMPT[=string]

  Specifies the prompt string for the subprocess. If you specify the
  /PROMPT qualifier but do not specify a string, the default prompt
  is displayed. The default is to copy the current prompt string
  from the parent process.

/SYMBOLS
  /SYMBOLS (D)
  /NOSYMBOLS

  Determines whether the system passes DCL global and local symbols
  to the subprocess.

/WAIT
  /WAIT (D)
  /NOWAIT

  Controls whether the system waits until the subprocess is
  completed before allowing more commands to be issued by the parent
  process. The /NOWAIT qualifier enables you to enter more commands
  while the specified subprocess is running. If you specify the
  /NOWAIT qualifier, you should also specify /OUTPUT to direct
  output to a file (rather than to the screen). This prevents your
  terminal from being used by both processes simultaneously.