As someone who has designed thousands of icons, this was a fascinating article.
I actually worked with some people involved in the original ANSI graphic standards. Jake Patala was an Industrial Designer at Xerox who designed the Start icon when he got tired of waiting for a standard. Also, I worked with some engineers at Smith Corona who were on the ANSI committee and would often explain to me the twisted rationale behind some of the more esoteric symbols. I never knew the Power icon-set was simplified until I read this article. It’s about time.