SharePoint 2010 releases in variety of type, editions and licence versions. There are
- 2 versions: SharePoint Foundation (SPF) and SharePoint Server (SPS)
- 2 editions: Enterprise and Standard
- 2 modes: non Internet & for Internet
SharePoint Server 2010 Enterprise CAL
For organizations looking to standardize on a complete, end-to-end business collaboration platform to connect and empower people across teams and geographies, cut costs with a unified infrastructure enabling business productivity, and rapidly respond to business needs with familiar and intuitive interfaces. Use the Enterprise CAL capabilities of SharePoint to fully interoperate with external systems, line-of-business applications, web services, and Microsoft Office; make better decisions with rich data visualizations, dashboards and scorecards, and advanced analytics; build and maintain robust applications, rich web forms, and workflow-based solutions.
SharePoint Server 2010 Standard CAL
For organizations looking to deploy a business collaboration platform across all types of content. Use the core capabilities of SharePoint to manage content and business processes, find and share information and expertise, and simplify how people work together across organizational boundaries.
SharePoint Foundation 2010
For smaller organizations or departments looking for a low-cost entry-level or pilot solution for secure, Web-based collaboration. Use SharePoint Foundation to coordinate schedules, organize documents, and participate in discussions through team workspaces, blogs, wikis, and document libraries on the platform that is the underlying infrastructure for SharePoint Server.
SharePoint Server 2010 for Internet Sites, Enterprise
For organizations looking to create scalable customer-facing Internet websites or private secure extranet sites using the full Enterprise capabilities of SharePoint Server 2010.
SharePoint Server 2010 for Internet Sites, Standard
For small and mid-sized organizations looking to create public Internet sites or basic extranets using the Standard features of SharePoint Server 2010.
Comparison Matrix of Features and Webparts can be downloaded sharepoint 2010 features comparison