DDJ is short for data-driven journalism. The term refers to stories that focus on numbers, statistics and visualizations thereof (e.g. in charts and infographics), but also to the very process of going through and analyzing (large) sets of data – usually with the help of digital tools – in order to create such content. DDJ, which can be closely linked to data science, has continuously evolved and now includes all kinds of sources, ranging from "traditional" research on the web to vast digital file dumps to internet of things (IoT) sensor recordings or satellite images and earth observation (EO) data.