While we are here talking, my partner Charles is walking to Kiel. He started on the 4th of June, and we expect it will take 30 days. The logistics are similar to that of an expedition, and Charles is an "explorer". He's carrying a server in his backpack, so at the same time he is this, too, which is how we are tracking him. The "web walker", a special software we developed with programmers, tracks Charles' movements with GPS (Global Positioning System). You can see this by the changing IP numbers (identification numbers assigned to every computer linked to the Internet) on the first screen of the installation. This then causes changes on the other three monitors: the browser, the mapping software, and the pinging tracer program.