Calendars, shopping lists and meeting notes are moving onto smartphones, into apps and into the cloud. Yet desks are still often littered with notebooks and Post-it notes, calendars hang on the wall and shopping lists are tucked away in trouser pockets, just as they always have been. Why is that, actually? A look at how different generations use paper in their daily lives shows that paper isn’t going away. But when and how we use it is changing.