"It appears that many corporate network users are taking advantage of fast Internet connections at work by publicly uploading and downloading infringing files on P2P (peer to peer) services, and also distributing and storing such files on corporate intranets," the groups wrote. "The use of your digital network to pirate music, movies, and other copyrighted works both interferes with the business purposes your network was built to serve and subjects your employees and your company to significant legal liability."