Amateur radio, often called Ham Radio, is both a hobby
and a service in which participants, called "hams" use
various types of radio communications equipment to
communicate with other radio amateurs for public service,
recreation and self-training.
Amateur radio operators enjoy personal (and often worldwide)
wireless communications with each other and are able to support
their communities with emergency and disaster communications if
necessary, while increasing their personal knowledge of electronics
and radio theory. An estimated six million people throughout the
world are regularly involved with amateur radio.