The Domesday Book enumerating much of England has survived since 1086 in the National Archives at Kew in London. The electronic version of the project, the BBC Domesday Project, did not fare nearly as well. The BBC Project was completed in 1986; thirty years later the discs are nearly unreadable. Fortunately, the Centre for Computing History in Cambridge, UK was able to rescue the data before it was lost completely,
Lesson learned. We need to actively manage our digital information to ensure that it is not lost. I only hope everyone is listening.