I gave a blockchain presentation to my meetup group, Western Massachusetts All Things Blockchain. It’s embedded in this post. You can also see it on Slideshare. Please feel free to download the following files: Php sample code that demonstrates POW concepts; Microsoft PowerPoint XML Presentation If you use any of my material, please give me an attribution. Thanks for having a look. … More Presentation: Intro to Blockchain – And, by the way, what the heck is proof of work?