Backspace           <Backspace>
    -------------------------------------------------------------------------

    If Insert mode is ON:
     Deletes the character to the left of the cursor.  The text to the
     right of, and including the cursor position, shifts left one
     position. If the cursor is in column one, the cursor line is
     appended to the end of the preceding line.

    If Insert mode is OFF:
     Deletes the character to the left of the cursor.  The text to the
     right of the cursor does NOT close in or shift.  If the cursor is
     in column one, however, the cursor line will still be appended to
     the end of the previous line.