The author tries to explain a couple of times on what mathematical basis new systems have been designed. He fails again and again. My maths teacher in secundary school explained it to the class about 35 years ago - much better. This book is a labyrinth of US internal politics, if it would have been written by a real author, such as Dava Sobel (Galilea's Daughter, Longitude), then I would recommend it to everyone. Now, I gave up after struggling through half of it... he has produced a chronological collection of anecdotal evidence without bringing any light to the theories behind all this.