(1) A Web page that contains a list of links to other websites. The order of the list is based on the number of clicks users make to each site. The more clicks, the higher up the list the link to the site moves. Webmasters use topsites as a way of attracting visitors and collecting per-click revenue. Typically written in PHP, although other languages are used, there are free topsite scripts available as well as commercial products. Monster Top List (www.monstertoplist.com) is a commercial vendor, while Dev Shed's Scripts (www.scripts.com) catalogs both free and paid topsite scripts by language.