2.5.4.6 OLD Command
  The OLD command brings a previously created BASIC
  source file into memory. The following command reads
  PROG1.BAS into memory:
  OLD PROG1

  If you do not specify a file name, BASIC issues the prompt:
  Old file name--

  You should respond with a file name. If you do not spec-
  ify a file type, VAX BASIC reads a file with the specified file
  name and the default file type. If you press the Return key
  in response to the prompt, BASIC searches for a file with the
  default file name and default file type: NONAME.BAS.