Looked it up because of http://news.ycombinator.com/item?id=1217310 http://news.ycombinator.com/item?id=1217310 and hadn't heard of it before. As a side note,

Looked it up because of http://news.ycombinator.com/item?id=1217310 http://news.ycombinator.com/item?id=1217310 and hadn't heard of it before. As a side note, Morris worm mentioned in the diagram tickled me.