the planet, and attracts tens of thousands of participating stations each year. In large contests the number of people taking part is a significant percentage of radio amateurs active on the HF bands, although they in themselves are a small percentage of the total amateurs in the world. There are regional contests that invite all stations around the world to participate, but restrict which stations each competitor may contact. For example, Japanese stations in the Japan International DX Contest (sponsored by Five Nine magazine) may only contact other stations located outside Japan and vice versa. There are also contests that limit participation to just the stations located in a particular continent or country, even though those stations may work any other station for points. All contests use one or more amateur radio bands on which competing stations may make two-way contacts. HF contests use one or more of the 160 meter, 80 Meter, 40 Meter, 20 Meter, 15 Meter, and 10 Meter bands. VHF contests use all the amateur radio bands above 50 MHz. Some contests permit activity on all HF or all VHF bands, and may offer points for contacts and multipliers on each band. Other contests may permit activity on all bands but restrict stations to making only one contact with each other station, regardless of band, or may limit multipliers to once per contest instead of once per band. Most VHF contests in North America are similar to the ARRL June VHF QSO Party, and allow contacts on all the amateur radio bands 50 MHz or higher in frequency. Most VHF contests in the United Kingdom, however, are restricted to one amateur radio band at a time. An HF contest with worldwide participation that restricts all contest activity to just one band is the ARRL 10 Meter Contest. Contests exist for enthusiasts of all modes. Some contests are restricted to just CW emissions using the Morse code for communications, some are restricted to telephony modes and spoken communications, and some employ digital emissions modes such as RTTY or PSK31. Many popular contests are offered on two separate weekends, one for CW and one for telephony, with all the same rules. The CQ World Wide WPX Contest, for example, is held as a RTTY-only competition one weekend in February, a phone-only competition one weekend in March, and a CW-only competition one weekend in May. Some contests, especially those