Introduction InFOrmaTIOn In THIs CHapTer · Book Overview and Key Learning Points · Book Audience · How This Book Is Organized Look around any street, business, or home. There is a world of information passing in front of us and through us that many people just don't perceive. Wireless signals are everywhere, passing information between sources at incredible speeds just beyond our vision. We all use dozens of wireless devices in our daily lives, simple things like wireless doorbells that communicate very simple information to modern smart phones that have access to all the knowledge of the Internet. It's when you start to