This document discusses the wireless communication technology Zigbee. It begins by defining Zigbee as a technological standard created for control and sensor networks, based on the IEEE 802.15.4 standard. It then contrasts Zigbee with other wireless technologies like WiFi and Bluetooth by noting that Zigbee is designed for low data rates and power consumption, and controlling physical devices. The document outlines Zigbee's architecture including coordinator, router, and end device roles. It provides examples of Zigbee applications in building automation, industrial control, home automation, and more.