When Jurassic Park was on at the cinema, I remember laughing out loud with a couple of my computing mates when the young girl, Lex, looks at a computer screen and says: “It’s a UNIX system. I know this.” At the time, UNIX didn’t have much in the way of a graphical-user interface (GUI), unless you wanted to write one yourself. And it definitely looked nothing like the screen she recognised. Nowadays, a quick look around the many Linux and UNIX distributions demonstrates that GUIs are everywhere. There are probably some as fancy as the screen she was looking at before she got the Jurassic system up and running again to save them all from being eaten by dinosaurs.