Services are pervasive in today's economic landscape, and services-based architectures are being rapidly adopted as IT infrastructure. The need to take a broader perspective of services that includes people and organizational descriptions as opposed to just technical interface descriptions has already been recognized as part of an overall vision of Services Science outlined by IBM. In this context, we present Semantic Services Science (3S) model, which seeks to demonstrate the essential benefits of semantics to the boarder vision of Services Science, with service descriptions that capture technical, human, organizational and business value aspects. We assert that ontology based semantic modeling and descriptions can be used to energize services across the broad service spectrum. We demonstrate how 3S approach could be used along three points in this spectrum: 1) semantic descriptions of standard Web services with the help of WSDL-S, semantic policies and agreements, 2) semantic descriptions of light weight Web services and semantic mashups (smashups) using Web 2.0 technologies (e.g. REST, AJAX) and 3) ontology based profiling of people and organizational aspects of the assets associated with the knowledge services. We will also outline key role of semantics in enabling dynamic processes with autonomic properties. Such processes would be critical to the agile businesses that are part of our global and networked economy.