... A.k.a. “bit rot”.Piles of digitised material – from blogs, tweets, pictures and videos, to official documents such as court rulings and emails – may be lost forever because the programs needed to view them will become defunct, Google’s vice-president has warned.
Humanity’s first steps into the digital world could be lost to future historians, Vint Cerf told the American Association for the Advancement of Science’s annual meeting in San Jose, California, warning that we faced a “forgotten generation, or even a forgotten century” through what he called “bit rot”, where old computer files become useless junk.
Cerf called for the development of “digital vellum” to preserve old software and hardware so that out-of-date files could be recovered no matter how old they are.
“When you think about the quantity of documentation from our daily lives that is captured in digital form, like our interactions by email, people’s tweets, and all of the world wide web, it’s clear that we stand to lose an awful lot of our history,” he said.
http://www.theguardian.com/technology/2015/feb/13/google-boss-warns-forgotten-century-email-photos-vint-cerf