Abstract: This is a paper about the design of systems that are part human, part machine. It uses a framework for understanding the nature of technology that builds on W. Brian Arthur's notion of technology as the orchestration of phenomena to some use and the nature of technologies as assemblies. Technologies are treated as existing on a continuum between soft and hard, with soft technologies orchestrated by humans and hard ones embedding that orchestration within the technology. The concept is explored in relation to Athabasca Landing, a deliberately soft social system that attempts to avoid predetermined purpose and design so that its inhabitants actively create the technology as they use it. The paper describes some issues that arise and steps being taken to address them.