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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

Merveilles is a community project aimed at the establishment of new ways of speaking, seeing and organizing information — A culture that seeks augmentation through the arts of engineering and design. A warm welcome to any like-minded people who feel these ideals resonate with them.