ScienceDaily (July 18, 2008) — iTunes has the ability to manage and organize PDF files just as easy as music files, allowing radiologists to better organize their personal files of articles and images, according to a recent study conducted by researchers at Renji Hospital and Shanghai Jiaotong University School of Medicine in Shanghai, China. 16, 2007) — Website policy makers who use robots.txt files as gatekeepers to specify what is open and what is off limits to Web crawlers have a preference for Google over other search engines, say researchers. Science News. Hacking.