CASCADE maintains a log of activity for the documents that it manages. As shown in Figure 1, when you enter CASCADE, it informs you of the amount of activity since your last usage. This activity could include people adding new documents or comments about existing documents. You can choose to review a detailed list of this activity in order to find new documents/comments that you are interested in. As shown in Figure 12, the activity agent even keeps track of the documents you have reviewed, changing the status of activities from ``Unread'' to ``Read'' as you access the various components. Some of the activities that CASCADE reports are comment creation, document creation, editing, and link deletion.