The ARRL National Traffic System (NTS) is a well-organized system for routing formal written message traffic (RADIOGRAMS) from any point in the United States to any other. Messages are relayed from one ham to the next, using a variety of modes such as voice, Morse code, radio teletype, or packet radio. The NTS has it origins in the earliest days of radio as is indicated by the name, "American Radio Relay League" itself. In times of emergency, radiograms may be used to communicate information critical to saving lives or property or to inquire or learn about the health or welfare of a disaster victim. During these times, NTS works in concert with the Amateur Radio Emergency Service (ARES) and other emergency and disaster relief organizations.