The radio spectrum is the band of frequencies in the electromagnetic spectrum used by all wireless communications such as broadcasting, mobile radio, microwave, satellite, cellular, public safety services and certain domestic electronic devices.

The radio frequency spectrum is vital for national security, public safety, research and individuals making use of the spectrum be it through cell phones, cordless phones or even garage door openers. This natural renewable and finite resource is shared with the world. Finite because the same part of the spectrum can be used again and limited because the spectrum is similar to a highway in that only a certain amount of traffic can be carried depending on the road and weather conditions and the type of traffic on the road.