Nothing comes to mind that you can interface with a computer, but when I wrote the phrase I was thinking of projects on the scale of Long Now [0], requiring phy

Nothing comes to mind that you can interface with a computer, but when I wrote the phrase I was thinking of projects on the scale of Long Now [0], requiring physical etching on materials and very careful storage. Alternatively, tell people that they can't store something and you're likely to find it robustly mirrored by many. [0] https://longnow.org/ideas/very-long-term-backup/ https://longnow.org/ideas/very-long-term-backup/