In this issue of the TIM Review, we explore the theme of Platforms, Communities, and Business Ecosystems. An appropriate subtitle for this issue would be Technology Entrepreneurship in an Interconnected World. The separate notions of platforms, communities, and business ecosystems are likely familiar to TIM Review readers: all three have been recurring themes throughout the history of this journal, and its predecessor, the Open Source Business Resource (OSBR). This issue offers two fresh perspectives.