Fog Computing
Fog computing was coined by CISCO and envisages multiple compute points in an IOT network. Instead of the cloud being the sole compute engine gateways and other network infrastructure may have the resources ( being full fledged Linux devices) to pre process the data before sending to back end applications or sometime even processing it locally. Fog is different from the old Distributed Computing in the sense that many different compute engines of different capacity collaborate in near real time ( multiple gateway, On premise and cloud ). An common usage is in network surveillance and malware detection
Edge computing by contrast implies only one local compute point (the gateway) and no usage of cloud or on premises resources
