The document discusses comparing the business models of Skype and traditional telecommunications companies (telcos). It summarizes Skype's business model using the Business Model Ontology, which identifies nine elements including value proposition, customer segments, and revenue streams. It then compares Skype and telcos' business models, finding key differences in their value propositions, target customers, and core capabilities. The document also describes a Delphi study examining the disruption phases Skype caused to the telecom industry.