A couple of years ago, I went to a conference for programmers in Arizona, where I had the opportunity to attend several one-hour classes. Virtually all of the instructors used slide presentations to get through the material. Though there was nothing wrong with the material that was covered, the slide presentations they used really did nothing to help them in their session. It would have been just as good for them to print out their speech and give it the audience a copy to read along with. Th.