I think I might have misunderstood your initial post. I assumed you were talking about our articles since they are often intertwined with our work on the boards. If you are talking about the boards, then yes, you can bookmark them.
This is from our frequently asked questions:
How do I bookmark or subscribe to specific topics?
You can bookmark or subscribe to a specific topic by clicking the appropriate link in the “Topic tools” menu, conveniently located near the top and bottom of a topic discussion.
Replying to a topic with the “Notify me when a reply is posted” option checked will also subscribe you to the topic.
More information can be found here
under the section "Subscriptions and Bookmarks." I hope this helps and I apologize for the confusion!