This feature is available in all editions.
Stories are managed in the backlog and can be comprised of:
Acceptance Tests (or Tests) to define acceptance criteria for the functionality
Tasks to define discrete work units for the team to complete to deliver the story
All stories belong to a project and can be scheduled for work in a sprint/iteration. Stories are often derived from larger-grained features called portfolio items. In addition, stories can be grouped into flexible backlog groups, which can form a hierarchy above stories, and backlog goals/objectives, which allow for a many-to-many mapping to stories.