This is an upgrade. You must previously own Team Foundation Server to be eligible for this product (See below for details).
Visual Studio Team Foundation Server (TFS) 2010 is the collaboration platform at the core of Microsoft’s application lifecycle management solution that automates the software delivery process and enables organizations to effectively manage software development projects throughout the IT life cycle. Team Foundation Server 2010 enables the team to be more agile, collaborate more effectively, and deliver better quality software while building and sharing institutional knowledge. Project artifacts and data from work item tracking, source control, builds, and testing tools are stored in a data warehouse and powerful reporting and dashboards provide historical trending, full traceability and real-time visibility into quality and progress against business intent.