2.5.4.11 SAVE Command
  The SAVE command copies a BASIC source program from
  memory to a file. You can specify a storage device, a file
  name, and a file type in the SAVE file specification. In the
  following program, a SAVE command instructs VAX BASIC
  to arrange the program in ascending line number order and
  copy it to a file on MTA1: in the current default directory
  with file name TEST and the default file type of .BAS.
  10 REM THIS IS A TEST
  30 PRINT "THIS IS A TEST"
  SAVE MTA1:TEST

  If the program in memory has no name, and you issue the
  SAVE command with no argument, VAX BASIC copies the
  program to a file named NONAME with the default file type
  in your current default device and directory.