Although we think of web pages and their graphics as a unit, web page files do not contain graphics but consist instead of embedded links to separate graphics files. These embedded image links () are used by the web server to deliver a package consisting of an html file, plus all associated graphics, css or JavaScript files, and other media files. Most web “pages” are actually a constellation of files delivered to and assembled by the browser into the coherent page we see on our screens. Attention to file and directory names is essential to keeping track of the myriad pages and supporting files that make up a web site (fig. 5.2).