Early versions of Flickr focused on a chat room called FlickrLive, with real-time photo exchange capabilities.[14] The successive evolutions focused more on the uploading and filing back-end for individual users and the chat room was buried in the site map. It was eventually dropped as Flickr's back-end systems evolved away from Game Neverending's codebase.[15] Key features of Flickr not initially present are tags, marking photos as favorites, group photo pools and interestingness, for which a patent is pending.[16]