My attention was drawn to this Vodafone ad that uses the NATO alphabet to say C-O-M-M-U-N-I-C-A-T-E  C-L-E-A-R-L-Y. An excellent example of the difference between delivering a message (i.e., writing your bullet points on a slide) and getting someone else to understand/internalize what it says.
I am not sure yet how to use it yet, but this NATO alphabet is a good thing to remember when thinking about chart concepts.