The Purdue Online Writing Lab, or OWL, is a wonderful free resource for anyone looking for writing tips, citation examples, or training material. You can learn about the effective use of fonts, color, and other visual elements in your presentations. If you have ever felt defeated by commas, hyphens, or apostrophes, you will be able to correctly place them at your service with OWL’s help. The Media File Index makes it easy to locate all of the PowerPoint presentations, podcasts, Flash movies, and writing samples available on the web site. While you are visiting the web site, take a look at the Grammar blog and the information on job application writing.