Bookmarks are a very easy way to keep track of all your selected data sources while browsing through The Index.
Bookmarks work in a similar fashion to an online shopping cart or list. Simply click Add Bookmark for any data source of interest and that data source will be added to your Bookmark list. (Clicking on Remove from Bookmarks will delete the data source from your list of Bookmarks)
Once you have finished searching The Index, simply click on View Bookmarks to view your entire Bookmark list. From within the Bookmarks Listing page, you can access any bookmarked data source, email your list of bookmarked data sources and delete data sources from your Bookmarks.
If you have cookies enabled, your Bookmark list will also be remembered the next time you return to The Index.