This book identifies potential research directions and technologies that will facilitate insight generation in various domains from smart home, smart cities, science, industry, business, and consumer applications. The editors present a key pillar of using Fog Computing to make a smooth and timely transition from the current wireless 4G/5G environment. They also discuss testbeds for future emerging services in the field. To realize the full potential of Fog computing and similar paradigms, researchers and practitioners need to address several challenges and develop suitable conceptual and technological solutions for tackling them. The editors explore these solutions through sections doscussing the development of scalable architectures, moving from closed systems to open systems, dealing with privacy and ethical issues involved in data sensing, storage, processing, and actions, and more.