Pentagon military PPT slide ...
There are many books and articles about Power Point and personal presentations.
The only valuable thing I read on this subject is Godin's short text on this subject by this link
Quote about personal communication:
Communication is the transmission of emotions. Communication is to make others accept your point of view, help them understand why you are excited (or sad, optimistic, etc.). And if all you want to do is create a bunch of facts and graphs, then cancel the meeting and just send them a written report.
I subscribe to 100%. For this I do not like conferences. Millions of slides and zero emotions. Although it should be the other way around.