This document discusses various wireless technologies including ZigBee and methods to reduce interference between them. It mentions several companies such as Harvard Technology, Cree Inc., SISCO, and Willow Technologies that develop wireless lighting control and networking products using ZigBee. The document also discusses papers from these companies on topics like WiFi interference, test procedures to analyze interference, and strategies for channel selection and collision avoidance to reduce interference between different wireless standards operating in the 2.4GHz band.