From Wired, a special issue celebrates the magazine’s 20th anniversary. 40 years of icons: Jesse Hicks on the evolution of the modern computer interface. From Popular Science, a look at how the most powerful supercomputer of 2009 is already obsolete. Joel Mokyr reviews The American Technological Challenge: Stagnation and Decline in the 21st Century by Jan Vijg. What happened to the Internet productivity miracle? John Cassidy wonders. From IEET, David Brin on technologies that might change everything. Jathan Sadowski reviews Infinite Progress: How the Internet and Technology Will End Ignorance, Disease, Poverty, Hunger, and War by Byron Reese. The Delete Squad: Right now the rules of what you can — and can't — say on the internet are being rewritten by twenty-something tech executives; cross your fingers. David Wong on 6 new kinds of anxiety the Internet gave us.