In this lecture we discuss among other things the use of pie charts. The phrase ‘Save the Pies for Desert’ was used by Stephen Few in his article with the same title (http://www.perceptualedge.com/articles/visual_business_intelligence/save_the_pies_for_dessert.pdf). Some figures from this article have been used in the video with permission from the author. If you want to read more about data visualization the website of Stephen Few (http://www.perceptualedge.com) contains loads of useful resources.