/LIST[=file-spec]
  /NOLIST

  Controls whether the compiler produces an output listing file.
  When you specify /LIST, you can control the defaults applied to
  the output file specification by your placement of the qualifier
  in the command.

  The listing file always contains a listing of the source program.
  Other portions of the listing file are optionally produced under
  the control of the /MACHINE_CODE, /MAP, and /CROSS_REFERENCE
  qualifiers.  The /LIST qualifier is required when you want to
  use the /CROSS_REFERENCE, /COPY_LIST, /FLAGGER, /MACHINE_CODE,
  or /MAP qualifiers.

  In batch mode, /LIST, the default, causes the compiler to create
  an output listing file with the same file name as the input source
  file and with a default file type of LIS.

  In interactive mode, /NOLIST, the default, suppresses the creation
  of a listing file.