“Blue Screens of Death” on public displays amuse me. There\u2019s something oddly entertaining about a railway station departure board throwing a Windows fit or a high street advertising screen stuck waiting for a DHCP lease. It\u2019s the digital equivalent of seeing behind the curtain \u2014 a reminder that there\u2019s a PC in there somewhere, doing its best to run the show.<\/p>\n\n\n\n
And that\u2019s the thing, isn\u2019t it? It is<\/em> just a PC. These days, so many of the things we take for granted \u2014 the TV, the fridge, the car \u2014 are just another node on the network.<\/p>\n\n\n\n Take my car, for instance. I recently renewed the subscription for its connected services. For a modest fee, I can check if it\u2019s locked, see its mileage, locate it on a map, get a journey history for my expense report, and browse a whole range of data that used to stay hidden behind a service technician\u2019s diagnostic port. And it\u2019s not just a luxury add-on \u2014 since 2018, EU regulations have required all new cars to include built-in connectivity for emergency calls (eCall)<\/a>, so the hardware is there whether I subscribe or not.<\/p>\n\n\n\n Later in the day, I stood at the station as a train rolled in. Its destination display had gone wrong and cycled through what looked like debug information \u2014 including an internal IP address and MAC address. Those probably belonged to the signage system, but I\u2019d bet good money the whole train runs a local network, linking everything from passenger information to onboard diagnostics, and connecting it all back to control centres via mobile data or trackside Wi-Fi.<\/p>\n\n\n\n