This episode looks at some of the issues around copyright and fair use of information. Most scientists encounter these issues at three points: when they are submitting a manuscript for publication, when they want to use items from their published articles in other publications, presentations, or in teaching, and when they want to use items published by other scientists in their own publications, presentations, or in teaching. Beyond that, as citizens in a digital world, we run into some of the same questions when using any content, scientific or not, on the Web. The first part of this episode looks at what copyright is, what happens when you transfer copyright to a publisher, and what rights you as an author retain when you transfer copyright. The second part discusses fair use, which are exceptions to copyright when certain conditions apply.