Radios are communication systems that send and/or receive electromagnetic waves.

Wireless modems transmit modulated data using electromagnetic waves.

Terrestrial and satellite radio service providers transmit radio programming over satellite, cable networks and over open airwaves

Radio modems are radio frequency transceivers for serial data.

Radio frequency identification (RFID) products read or write data to RF tags that are present in a radio frequency field projected from RF reading/writing equipment

Antennas are structures or devices used to collect or radiate electromagnetic waves.

Towers, poles and support structures elevate, support and/or position personnel and equipment such as antennas, lighting, surveillance cameras or sensors, wind turbines, weather instruments, and power lines.