Software is recognised as a significant economic agent in at least three ways. First, the production of software constitutes an important industry in its own right. There is no clearer signal of this than the fact that Microsoft is one of the world's largest companies, and that the software industry is a significant generator of income and profits the world over (Auletta, 2000;Hozic, 1999). Indeed, the industry is so large that it is able to remain highly profitable despite a chronic problem of copyright infringement in many countries of the world, while it is also able to support the business model of open source which is based on the giving away and sharing of code between programmers and users (von Krogh et al, 2003;Weber, 2004;Zeitlyn, 2003). Second, the significance of software can be determined, ironically, by its takenfor-granted nature. Software and code have sunk into the business background (Leyshon et al, 2005a), and much of the economy would simply be unable to run without it, and all manner of procedures, conventions, and protocols are highly dependent on the unproblematic unfolding of software programs (Dodge and Kitchin, 2005b;Thrift and French, 2002). Moreover, within some industries software has been part of the business vernacular for decades, since at least the 1960s in some cases. Third, and finally, software is seen as a catalyst for economic change. This view of software and code became particularly prevalent in the 1990s as part of the hyperbole that surrounded the