 A similar model for charging requirement can be thought of for Internet of Things and Web of Things. So we look at the small but emerging ecosystem for Internet and Web of Things. Once you export IoT or sensor networks onto Web, so completely unprecedented business models can be generated. Involving purely private networks, purely public networks or public-private partnership, leading to certain interesting applications like smart city, smart buildings, e-health, etc. The services are provided to the end users. For instance, in the case of smart home, smart building by the network provider, involving certain custom devices. So the network and the device are sometimes the responsibility of the network provider as such or the device provider has to be a different entity. So it means that we can think about the variants of provisioning methods in the form of some models. Let's start with a single business player that provides the network, operates the devices, has the platform, even provides the content that is the application on the application servers to the end users. So this is where there's a monopoly of one operator over everything. Then we can think about another model where we have one player, one entity operating the devices, network and platform for the IoT devices. However, the application or the content is coming from another provider. So this could be considered as a second variant. As a third variant, we can think about one operator that's now performing the network provisioning and platform provisioning. What I'm suggesting is it could be different kinds of recipes for different environments. So in this case, the network and platform are provided by a certain operator. Then the other one could be responsible for devices and the applications themselves. And then we could make it slightly more interesting once we have the network alone provided. The other is a device provider and platform and application provider. And then we could have three players altogether different. We have the network provider. We have the platform provider. We have the device provider. And sometimes we have a separate application provider as well. So this all can be summarized from this table. I'm referring to the book engine architecture by Tony Jenevsky. It was published by John Wiley. So you can see here that we have in the first column, five different models that we've just seen and we have separate providers. Depending upon the regulatory regime of a certain country and the business opportunities, different players can jump into all or some of these sectors.