If you are not logged in, the 'Active Topics' link in the Header will show a list of all topics that have been created or updated since your last visit, and on the Second Tab there is a List with showing all Unanswered Topics.
If you are logged in, the 'Active Topics' link will change to 'My Topics'. On the My Topics Page there are 5 Tabs that shows the…
Active Topics - Show a list of all topics that have been created or updated since your last visit.
Unanswered Topics - Shows all Topics which have no Replies.
Unread Topics - Shows all Topics containing unread messages.
Topics you've posted in - Shows all Topics you have created or posted in.
Favorite Topics - Shows all Topics which you have tagged as Favorite Topic.