John - There isn't really any difference between them, they both alias the same directory off the document root. *however* if you were to only have Alias /books/ "D:/www/books/" in your config file, http://foo.com/books would throw a 404 putting both of them in there ensures that http://foo.com/books/ or http://foo.com/books both work transparently to the user. Make sense? .djc. John Meyer wrote: > Can somebody on this list give me a practical difference between > > Alias /books/ "D:/www/books/" > Alias /books "D:/www/books/"