Today we celebrate Preservation Week! Organized by the American Library Association (ALA), the event reminds us of the importance of preserving not only our personal past, but also the vast resources of our libraries. In 2005, a comprehensive national survey showed that US institutions hold over 4.8 billion items, 63% of which are in libraries. Uncounted items held by individuals also include books, manuscripts, maps, photographs, ephemera, audio recordings, and objects.