SWIM, including this manual, is free software; you may redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.
This is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details.
                                                                     
          You should have received a copy of the GNU General Public             
          License with the swim source as the file                      
          COPYING.  If not, write to the Free Software                 
          Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.