Rarely had I been so excited to unbox a new ‘toy’. It was March 2000, and I’d just driven back to Cardiff from meetings in North Wales. The anticipation kept my tiredness at bay. It was a joy to take my new Psion 5mx personal organiser out of the box and turn it on for the first time.

I wasn’t disappointed. I’d never seen an electronic device quite as gorgeous. In the days when laptops weighted a ton, and mobile phones did little more than make calls and handle text messages, I marvelled how Psion had shrunk the essential elements of a laptop into a device that fitted in a pocket (just). Best of all was the keyboard, which flipped seamlessly into the clamshell case when you’d finished your tasks.