Today we’re shining a bright spotlight on recent work from our Programmable Ink research area — visualizable computation, software you can put your hands on, and a grimoire of rune stones and imagination. For the past few years, we’ve been quietly building a holistic, malleable notebook we call PlayBook. The goal is to make something that feels every bit as good as paper & pencil for sketching and writing in your own hand. But unlike paper, PlayBook is imbued with dynamic behaviour, built out...