This software is made freely available "as is" for your use. You may modify the software in any way that you wish. No warranty is made as to the suitability of this software for any particular purpose; the user takes all risks for its use. No copyright, trademark, or patent claims are made on this software or its name. Source code can be found by anonymous ftp to theory.lcs.mit.edu and looking in the pub/rivest/bibtag directory.