Command: ? (question mark)

  Displays a list of commands and features available with in the shell.

Syntax:

  ?
  ?command [argument]

Options:

  command   Any command
  argument  Any argument

Comments:

  The first variant displays any available internal COMMAND.COM
  command and feature.
  The second one will prompt whether or not to execute the specified
  command as if trace mode would be active.
  See also: ? (CONFIG.SYS/FDCONFIG.SYS: question)
  ?command argument can also be used in BATCH FILES and
  AUTOEXEC.BAT / FDAUTO.BAT

Examples:

  ?                           Lists all available internal commands.
  ?pause                      Asks if pause shall be executed.
  ?alias                      Asks if alias shall be executed.
  ?alias fd=C:\FREEDOS\BIN\   Asks with argument.