The Shortwave spectrum is regarded as the radio frequencies in the range from 1.8 to 30 mHz. International, or Regional Broadcasters sometimes use this range of frequencies to reach target audiences, but are correctly listed in Arts/International Broadcasters because broadcasting is a performing art, for the consumption of many. Listening to or monitoring such broadcasts and others such as utility, aircraft, marine, and military radio broadcasts by individuals is a radio-related, recreational hobby much like CB and Scanner listening. Monitoring activity, which is not restricted only to ShortWave frequencies, is often categorized in two ways, namely Short Wave Listening and DXing, or DX Listening. Short Wave Listening (SWL) is the casual and regular reception of International Broadcasters such as the BBC, Deutsche Welle, and Radio Canada International, among many others. They are easily heard by intended or target audience, through powerful shortwave transmitters, satellite broadcasts. DXing is the attempt to hear weak signals, signals that are for local audiences, but which may often be heard at further distances by listeners who use special equipment and antennas. Such listeners are often referred to as DXers who often also listen for weak signals outside the shortwave frequencies on the longwave and the mediumwave bands. Those extend from just over 0 kHz to 1.8 mHz. Information about longwave and mediumwave DXing is also found in the Shortwave category. Ham radio and CB, although within the Shortwave frequency spectrum, are considered separate activities, and in ODP, have their own categories. This is also true for scanning of radio services like police, fire and ambulance. by editor funk updated 2001.10.08