Symposium 2003 - Preservation of Electronic Records: New Knowledge and Decision-making was held in Ottawa, Canada, from September 15 to 18, 2003. Hosted by the Canadian Conservation Institute, the Library and Archives Canada, and the Canadian Heritage Information Network, the symposium aimed to increase awareness of the issues surrounding the preservation of electronic records by bringing expert and leading-edge opinions to a large audience including small and medium-sized archives, libraries, and museums. The program was based on the chronological decisions that need to be made as electronic records come into a heritage institution, and covered broad subject areas such as value criteria, authenticity criteria, factors to be considered in developing a preservation strategy, preservation strategies for information content, and media knowledge (deterioration, storage, longevity, disaster recovery, etc.). This book of postprints contains the complete text of all papers presented at the symposium (in the language of presentation) along with abstracts in both English and French for each one. It will be useful for anyone with electronic records in their collections.