Microsoft PowerPoint will be necessary to view and hear the slide lectures posted on the myCMU site. You will need a computer with speakers or headphones to hear the lecture audio. Note that we are using the concise version of the textbook and some works covered in the lectures are not in the textbook. This places great importance on being able to hearas well as see the lectures. (Non-Microsoft versions of PowerPoint are not able to access the audio attached to each lecture, so are not acceptable.) It is possible to view and hear the lectures on a mobile device [iPad, tablet, etc.], by using the free downloadable Microsoft PowerPoint App. For full info, see the course syllabus, p. 5.