http://tags.library.upenn.edu/tag/tagging+lc PennTags Feed http://tags.library.upenn.edu/makerecord/url/24712 http://tags.library.upenn.edu/makerecord/url/24712 LC has made it possible to make a permanant link to any bibliographic record in their catalog http://tags.library.upenn.edu/makerecord/url/24668 http://tags.library.upenn.edu/makerecord/url/24668 LC adds 3,000 images to Flickr and invites the public to tag them