Good morning! Or evening, if you happen to be reading this on the other side of the world. Our topic for today is the internet. What? You already know about the internet? No, no, I don't mean that internet, the boring old one you use to access YouTube and send Facebook updates, email and tweets and stuff. That's the internet of people and it's so, well, yesterday. I'm talking about the new internet, which is going to be the latest thing Real Soon Now. It's called the Internet of Things or IoT and it's got everybody very excited over in Silicon Valley, where they hyperventilate a lot about technology. When you ask them what it is they say things such as "a global, immersive, invisible, ambient networked computing environment built through the continued proliferation of smart sensors, cameras, software, databases and massive data centres in a world-spanning information fabric".