Professor Zhipeng Wu has invented a portable scanner based on radio frequency technology, which is able to show in a second the presence of tumours – malignant and benign – in the breast on a computer ...

Below is a list of all the BBC's radio services that are available on FM and AM. We have listed the frequency ranges, if you want to know the exact frequency for your location then use our ...

BBC Radio broadcasts throughout the UK on analogue, DAB digital Radio, digital television and online. Our stations available on analogue are listed below with the frequencies where you can find them.

Police scanners are actually legal to own and operate in the United States, because the radio frequencies used by law enforcement, like all U.S. radio frequencies, belong to the public.