Windows Web Services API(A native-code implementation of SOAP that provides a foundation for building Web services for internal Microsoft customers such as components of Windows and parts of Office)
Web services(Protocols that enable computers to work together by exchanging messages. Web services are based on the standard protocols of XML, SOAP and WSDL, which allow them to interoperate across platforms and programming languages, including the ability to manage federated identities and security)
PowerPivot Web service(A Web service that performs request redirection for processing requests that are directed to a PowerPivot Engine service instance that is outside the farm)
Exchange Web Services(A set of features that provides a programming interface for accessing Microsoft Exchange data through the Client Access server role by using Web services)
