Here's the Happy Hour segment from Fox Business with Dan Roam.
He has a simple explanation of Microsoft's strategy to buy Yahoo.
You can download the The 10 1/2 Commandments of Visual Thinking: The "Lost Chapter" from The Back of the Napkin here at ChangeThis
Also see previous posts:
Dan Roam's Napking Sketches on Fast Company
The Back of the Napkin
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