摘要:During the last decade, there has been a growing interest for theorizing in the infor-mation systems (IS) discipline. One important impetus for this was the call for theo-rizing the IT artefact as articulated by Orlikowski & Iacono (2001). Another impetus was similar claims by Benbasat & Zmud (2003). Besides concrete theory contribu-tions, there have been further discourses on what to theorize and how to theorize. It is not only the IT artefact that needs theorizing, following claims by Orlikowski & Iac-ono (2001). There are also claims for theorizing practices (e.g. Feldman & Orlikow-ski, 2011). There is also a growing interest for the constituents of a theory and how to theorize (e.g. Gregor, 2006). This is actually well represented in pragmatic research approaches, such as design research (e.g. Gregor & Jones, 2007; Kuechler & Vaishanvi, 2012) and action research (Davison et al, 2012). Following these interests in theorizing IT artefacts and practices we are happy to present this special issue.