Cloud-only models face serious challenges in latency, network bandwidth, geographic focus, reliability, and security. Fog computing reduces these challenges by providing a system level horizontal architecture to distribute computing, storage, control, and networking resources and services from the cloud to connected devices (“things”). Over time, fog and cloud computing will converge into unified end-to-end platforms offering integrated services and applications along the continuum from the cloud to things. Applications developed and deployed for the cloud will be able to run in fog and vice versa. Fog computing will be integral in developing and sustaining smart living.