So that it all still makes sens in 100 years they use the same thing as in GIS: metadata. But, instead of calling it that, they call it the archival information package. And, when their system is fully up and running, it willl not just be a stack of old floppies:
As MoMA acquires more digital artworks, and as the image resolutions used by artists and filmmakers increase, we project the digital collection to grow to approximately 1.2 petabytes (1.2 million gigabytes) by 2025.The new system will be dynamic and there is a video from IBM to show you how it works. But the overall story is one that should be fascinating to GIS thinkers who are looking forward to looking back someday.