just need all the necessary science and instructions for manufacturing the parts, starting from how to acquire the raw materials. that's out there, easy enough to find. this is something that i want to do, also, acquire such a library, ideally several copies of everything, stored in three separate locations.

also, physical objects that are critical to being able to do the math manually are critical. slide rules, abacus, and devices for writing and materials to write on. automation techniques for all of the steps should also be part of it, so you can scale up production faster.

idk how big such a library has to be, to get you to the point you can make a programmable calculator, but i would bet it's at least a meter thick of paper.