IT-innovation triggers the transformation of society, working life and the behavior of people. Digitization, digitalization, and digital transformation are buzzwords in this context. While existing publications discuss the benefits and consequences connected to the three terms, a proper conceptualization of them is still not available. A common understanding is that digitization and digitalization trigger digital phenomena which allow organizations to operationalize the process of digital transformation. Prior research identified some phenomena, like collaboration and sharing, but a structured analysis of the occurring phenomena is still missing. Embedding digital transformation and the phenomena into the context of socio-technical systems, we conduct a structured literature review to suggest theoretically and practically relevant definitions for the aforementioned terms and create an overview of relevant phenomena. We show that digitization, digitalization, and digital transformation are often used without selective distinctions, even though that it is not appropriate as each term has to take into account different concepts. Furthermore, we identify seven relevant phenomena: collaboration, sharing, communication, connectivity, flexibility, mobility, and co-creation.