Wireless is an old-fashioned term for a radio receiver, referring to its use as a wireless telegraph. The term was widely used in the UK, long after radio was being used for other signals, such as music.
Method of communication that uses low-powered radio waves to transmit data between devices. High powered transmission sources usually require government licenses to broadcast on a specific wavelength. This platform has historically carried voice and has grown into a large industry, carrying many thousands of broadcasts around the world. Radio waves are now increasingly being used by unregulated computer users.
Software and hardware developers are creating smaller computer networks which form ad-hoc wireless network, with protocols such as WiFi. The IEEE 802.11 standard is for wireless, Ethernet-like LANs. The insecurities in this protocol have popularized the concept of war driving.
Optimal bandwidth routes within wireless networks requires the calculation in real-time of the best way to direct traffic.
Microwave ovens (that cook food) use radiation in the 2.45 GHz range. Cell phones, wireless networking, and other similar tools are in the 2.4 GHz range. This is why proximity to microwaves can disrupt wireless communications