If something doesn't make sense to you and isn't explained here please mail the maintainer for an explanation.
See also, detailed help on:
Adobe's Portable Document Format (PDF) is particularly suited to offering printable files for download.
There are free PDF viewers for practically every platform:
Ghostscript is the most common postscript interpreter, and available for a wide range of platforms. It has a somewhat complex history. For a graphical interface to Ghostscript you probably want gv (which is a derivative of Ghostview) or GSView (which isn't).
Some of the postscript files here are GZipped, which is a way of compressing them so you can download them quicker. Most postscript viewers will handle GZipped files quite happily, but you may need to save them to disk first so your browser doesn't try to extract them first.
Try Google for other postscript viewers.
There is no need for a separate 'printable version' of any of the Web pages on this site, we simply use the appropriate Web standards for suggesting how a browser that supports Cascading Style Sheets can make the printed version look good.
If you have trouble printing - or if your browser still prints the search box and other navigation widgets - please consider using a browser that supports Web standards properly.
For printing PDF and postscript files, please see the advice above about viewers, all of which should allow you to print simply.
Really Simple Syndication (or other animals). It's a format for publishing content with enough structure that you can redisplay it, and use it in a way that's convenient to you, automatically. Crucially, it's very popular; lots of sites let you look at their content this way. Syndication geeks might want to look at the specification for RSS 2.0, which is an extension of the 0.91+ formats & that we're using here, or the one for RSS 1.0 which is a speciation of RDF and hangs around with the Semantic Web crowd. Both formats have been around for some time, and you shouldn't need to worry about it just to read feeds. As such, non-syndication-geeks should skip all that and find out what RSS is useful for. Play with an RSS reader, to get a feel for what you get.
Thanks to Etienne for having compiled links to these things in his RSS feeds faq.