Z-devices can be made of Z-devices - page 2 When I look at a toaster, I see hundreds of Z-devices. There is a power switch. This little button contains a Z-chip inside it with a tiny battery, or other form of power, and a radio, linking it into the Z-network. This switch can be manufactured independently, by a supplier to the toaster assembly company. The switch could be removed, put into a pocket, and taken to the planet Jupiter. Pushed there, the toaster back on Earth would start toasting! (It should be noted that very soon it will be possible to manufacture a tiny Z-chip with included power generation and radio, smaller than the dot at the end of this sentence, and at a cost of a few pennies.) I also see a few heating coils. These too are Z-devices, independently manufactured, each with their own Z-chips. There are a few temperature sensors throughout the toaster, each a Z-device with a Z-chip. There are several spring-operated objects to pop up the toast, or perhaps a few motors for the same purpose. Each of these have a self-powered radio-linked Z-chip, and are independently manufactured Z-devices. And we can dive even deeper. Each tiny motor used to pop up the toast has within it a number of coils, a few sensors, a power controller, and an overall operations controller, and each of these are independent Z-devices.