The possibility to include hyperlinks to almost every resource available on the Internet means that you don't have to include instructions anymore. Before the WWW was started, any document about Internet services had to contain some basic instructions on how to download files, use a mail server or connect to a particular computer. Now, all this can be done with a simple hyperlink, which hides all the technical details from the user.
So, when offering a file in a particular format, do not discuss where to download a program to view or play it, how to save the file to disk or how to decompress it: just add the link and make sure the server sends the right MIME type to identify the file.
