Explaining The Universe on Instagram: "Core rope memory was an early form of computer memory used in the 1960s, most famously in the Apollo Guidance Computer (AGC) that helped navigate the Apollo spacecraft to the Moon. It stored data by physically weaving wires through magnetic cores—tiny metal rings about the size of a pencil eraser. Each core represented a binary decision: if a wire passed through the core, it stored a 1; if it went around it, it stored a 0. What made core rope memory special