But I think Yvan is on to something... at least with microfilm (if it can be preserved easily over long periods of time), it doesn't require sophisticated technology. It's relatively simple to magnify an image and people can probably maintain much of that knowledge in a way that allows even a group of people with very little technology to figure out how to read it. You can see the difference easily if you compare it to the complexity of giving them a hard drive and no computers or electricity! But microfilm at least has a chance to be read.
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