2.5.4.2 LIST and LISTNH Commands
  The LIST and LISTNH commands display a specified line
  or lines. If you type LIST or LISTNH without specifying
  line numbers, BASIC displays a copy of the source program
  currently in memory, in ascending line number order.

  The LIST command prints a header displaying the program
  name and the current time and date before displaying the
  specified lines. The LISTNH command suppresses the header
  information and prints the specified lines only. For example:

  LIST 10 Displays header information, then displays
                                    line 10.
  LISTNH 50, 100 Displays lines 50 and 100.
  LIST 50, 90, 100-190 Displays header information, then displays
                                    lines 50, 90, and 100 to 190.