In May 2010 I read an article on the A List Apart website. If you picked up this book, it’s likely that you know the article I’m talking about. You’ve probably read it and heard it quoted, picked apart, debated, and discussed. Now, nearly four years later, that article is the basis of one of the biggest movements on the web since the web standards movement of the late 90s.

When Ethan Marcotte’s article, “Responsive Web Design,”[1] was published, I was still new to web development, having just started a job at my first web production agency. It had been a few months since I had bought my first iPhone and I had just started coding sites for mobile and including mobile stylesheets in my projects. I was struggling to find a ...

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