SFI External Professors Stephanie Forrest and James Brown, and their collaborators, show striking similarity in hierarchical branching networks in organisms and microprocessors. Applying metabolic scaling theory, they show computational systems are also characterized by nonlinear network scaling. They hypothesize a set of constraints between the size, power, and performance of networked information systems. See “Scaling Theory for Information Networks,” M. E. Moses, S. Forrest, A. L. Davis, M. A. Lodder, and J. H. Brown, Journal of the Royal Society Interface 5(29) (2008): 1469-1480.