DNA: From Search to Observation Revisited Link 21 Dec 2015 Our Thinking DNA, Social Machines A paper by Ian Brown, Lisa Harris and Wendy Hall, describing the extension of a model to describe Social Machines. The new model includes external and non-linear factors and grouping and sequencing of processes. → http://eprints.soton.ac.uk/377661/1/DNA-S2O-Camera.pdf