Book excerpt: Learn about the most popular wireless data communications technologies in use today as Olenewa�s GUIDE TO WIRELESS COMMUNICATIONS, 5th Edition, examines Bluetooth, ZigBee, Thread, Wi-Fi, cellular and satellite communications while providing a broad industry perspective. You develop a solid base of knowledge in Wireless Personal Area Networks (WPANs), Wireless Local Area Networks (WLANs), Wireless Metropolitan Area Networks (WMANs) and Wireless Wide Area Networks (WWANs). Written in simple language, with a focus on what you need to know to get started and not sound like a novice, this book�s comprehensive approach provides you with the solid background you need to prepare for a future career in today�s wireless data communications technology field.