This chapter considers the findings of studies of the situated practice of Web information architecture (IA) in organizations of varying size. The focus is on the work of web information architecture, with the aim of developing a deeper understanding of the practice and its influences. From the examination of the practice that surrounds the creation of an information-rich website, this chapter reports the disciplinary profiles of the practitioners of web information architecture and reveals the extent of the influence of the information tradition and discipline. It invites reflection on the consequences of these findings for future theory and a disciplinary base for information architecture.