 Welcome to data sourcing. I'm Barton Polson. And in this course, we're going to talk about data opus or that's Latin for data needed. The idea here is that no data, no data science, and that is a sad thing. So instead of leaving it that we're going to use this course to talk about methods for measuring and evaluating data, and methods for accessing existing data, and even methods for creating new custom data. Take those together. And it's a happy situation. At the same time, we'll do all of this still at an accessible conceptual and non technical level, because the technical hands on stuff will happen in later other courses. But for now, let's talk data.