This book critically engages with the activities and theoretical exchanges between the free/libre and open source software groups who write and share computer code online. I place these groups in the context of the expansion of intellectual property rights and look at their discourses surrounding the enclosure of the ‘intellectual’ commons. In particular, I explore how free/libre software and open source software (FLOSS) articulates productive forms of self-knowledge and discipline (such as through discursive formations and code), which appear to establish a potential for uncoordinated and decentred models of creativity.