Amateur radio or Ham radio is a common term for communicationg over the radio waves for fun.
A wide spectrum of frequencies are reserved for amateur radio services by the International Telecommunication Union.
This is a hobby enjoyed by houndreds of thousands all over the world. For the third world countries it offers a cheap and comprehensible method of teaching communication technology.

In emergencies radio amateurs can provide contact between victims and rescue crew. However, on the daily basis, hams spend their time enjoying whichever section of their hobby they fancy. Check out theese frames for some examples.
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