SQL Server Data Services
SSDS is a Web 2.0 friendly data service. When you interact with the service, SSDS supports open wire formats. It supports both SOAP and REST interfaces.

SQL Server Integration Services
SSIS is a platform for building high performance data integration solutions, including extraction, transformation, and load (ETL) packages for data warehousing.

SQL Server Analysis Services
SSAS delivers online analytical processing (OLAP) and data mining functionality for business intelligence applications.

SQL Server Reporting Services
SSRS delivers enterprise, Web-enabled reporting functionality so you can create reports that draw content from a variety of data sources, publish reports in various formats, and centrally manage security and subscriptions.