While it's true that in the digital age records are more ephemeral, that seems to be changing. Office file formats changed a lot until Office 6 on the Mac and PC. That version survived until Office 2007/2008, is still supported to this day, and the new format is XML and open source. Also PDF has become a de facto standard that has survived for quite a long time. So there are some file formats that should be more lasting.
4/15/14 at 8:58pm