“…'building' or 'constructing') since it gives a "sense of an organic unfolding within an existing (and changing) environment" where there is a "recurring issue of adjustment in which infrastructures adapt to, reshape, or even internalize elements of their environment in the process of growth and entrenchment" (Edwards et al 2007, p. 369). These processes of infrastructure evolution happen along multiple temporal scales (Edwards et al 2009;Ribes and Finholt 2009;Karasti et al 2010). In this perspective, we approach the cases by paying attention to the strategies enacted in order to deal with the installed base, and examine how developing infrastructures entails engagement in processes of extension, recombination, substitution of parts and arrangements that already exist.…”