Designers on acid: the tripping Californians who paved the way to our touchscreen world

Next time you drag a document across your desktop and put it in a folder, spare a thought for acid. Organising your files might not seem like a psychedelic experience now, but in 1968, when Douglas Engelbart first demonstrated a futuristic world of windows, hypertext links and video conferencing to a rapt audience in San Francisco, they must have thought they were tripping. Especially because he was summoning this dark magic onto a big screen using a strange rounded controller on the end of a wire, which he called his “mouse”.