Open source is the free distribution of software or information. But why give it away? “The characteristics of information — be it software, text or even biotech research—make it an economically obvious thing to share. It is a “non-rival” good: ie, your use of it does not interfere with my use. Better still, there are network effects: ie, the more people who use it, the more useful it is to any individual user. Best of all, the existence of the internet means that the costs of sharing are remarkably low. The cost of distribution is negligible, and co-ordination is easy because people can easily find others with similar goals and can contribute when convenient. The question is, can sharing be used to supply more than just information?”