How Technology Works on Instagram: "Follow @howtechnologyworkss to learn how technology shapes our world, one post at a time This simple wooden model shows the core idea behind the ancient Egyptian pin lock, one of the earliest security mechanisms ever invented. Inside the wooden body sit several vertical pins, each resting at a different height. When the wrong key is inserted, the pins stay in place and block the locking bolt, preventing the door from sliding open. But when the correct L shaped

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