Radio systems are communication systems that use radio waves to transmit and receive information over distances. They consist of a transmitter, which converts information into radio signals, and a receiver, which captures these signals and converts them back into usable information. Radio systems are widely used in various applications, including television broadcasting, cellular networks, and two-way radios. These systems operate on different frequencies, allowing multiple channels to exist simultaneously without interference. The range of a radio system can vary from a few meters to thousands of kilometers, depending on factors like power output, antenna design, and environmental conditions. Common types of radio systems include AM and FM radio, as well as digital radio technologies.