Social bookmarking allows users to save bookmarks online and tag them with keywords instead of organizing them into folders. This allows bookmarks to be accessed from any computer and shared with others. Popular social bookmarking tools discussed include Delicious, Furl, and CiteULike. Social bookmarking allows users to find bookmarks by searching tags and see what others have bookmarked. Some libraries are using social bookmarking tools like Delicious to organize research resources and share subject guides. Tagging also allows users to organize and catalog other online resources like photos, articles, and items in library catalogs.