Introduction.- Web Science.- Service Science.- Web Services.- Web2.0 and RESTful Services.- SemanticWeb.- Web Service Modeling Ontology.- The Web Service Modeling Language.- The Web Service Execution Environment.- Triple Space Computing for SemanticWeb Services.- OWL-S and Other Approaches.- Lightweight SemanticWeb Service Descriptions.- SWS Are Good For What: dip, SUPER, and SOA4All Use Cases.- Seekda: The Business Point of View.-