This file is a tar/gzip/uuencoded html archive. I prefer to read html with hyperlinks on-line! If you want the postscript version, use the following URL http://www-fourier.ujf-grenoble.fr/~parisse/diracbkw.ps.gz To decode, you need uudecode, GNU gzip and tar, type uudecode diracbkw.uue gzip -d diracbkw.tgz tar xvf diracbkw This should create a directory named diracbkw. Now, launch netscape or your favorite webbrowser and open the file diracbkw/diracbkw.html.