Input (grade 10): The community aspect of BookCrossing.com has grown and expanded in ways that were not expected at the outset, in the form of blog or forum discussions, mailing lists and annual conventions throughout the world.
Output (grade 8): The community aspect of BookCrossing.com has grown in ways that were not expected at the start, in the form of blog or forum discussions, mailing lists and yearly conventions all over the world.