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“Then you realize that the pointers are not fixed, but can slide on the frame… and then you note that they are somehow interconnected -- moving any of the small ones will move the larger one this way or that. Strange. But when you see the diagram of the inner mechanism you realize what this is, and it can take your breath away…”
nzeldes.com/HOC/Posographe.htm

@tendigits upthread, a mechanical pointer based exposure computer called the posographe

@tendigits The construction of these sorts of physical computing devices was an art and is now basically a lost art. An entire skill obliterated by computers.

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Merveilles

Revel in the marvels of the universe. We are a collective of forward-thinking individuals who strive to better ourselves and our surroundings through constant creation. We express ourselves through music, art, games, and writing. We also put great value in play. A warm welcome to any like-minded people who feel these ideals resonate with them.