By Tim O’Reilly

ONE OF THE THINGS WE LOOK FOR AT O’Reilly Media is people who know how to do magic. These are people who can surprise us by their mastery of technology, some trick or two that makes us start with surprise and say, “How did you do that?” As in the famous Arthur C. Clarke dictum, it isn’t really magic, just something they know that we don’t. Sometimes the magic is a simple hack or tool. Sometimes it’s a really big, world-changing idea that they’ve just caught on to before everyone else.

The first websites were like that. In 1993, people’s eyes bugged out when they saw someone click a link on what appeared to be a document on a PC screen, and suddenly pull up another document from a server ...

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