The Internet of Things (IoT) and smartphones generate so much data and require response times so brief that networks, even though they have multiplied their speed, are slow. In these cases, interacting under the paradigm of cloud computing is now dispersed in the form of fog (fog computing). In other words, processing returns to the edge of the network and to terminal devices. A behavior that seems cyclical: from the mainframe, to the PC in solitude; from there to the client-server; at that moment, "the network is the computer", which (almost) returns us to the silly terminal; after that the cloud and now processing returns to the devices and to the edge of the network.