The core of our work is to present a SOA-based framework of a web operating system that makes uses of web semantics in its underlying file system. "SEWOS", as it is named, moves user's traditional operational desktop environment into a web browser accessed by user any time anywhere. The usage of semantic web techniques provides better organization, annotation, navigation and searching capabilities. Usage data, user’s personalized settings along with file system ontology are all used to provide user a desktop metaphor and an experience that almost mimics traditional desktop.