The mucher higher tech version of this is Little Old Lady memory: https://en.wikipedia.org/wiki/Core_rope_memory https://en.wikipedia.org/wiki/Core_rope_memory

The mucher higher tech version of this is Little Old Lady memory: https://en.wikipedia.org/wiki/Core_rope_memory https://en.wikipedia.org/wiki/Core_rope_memory Wires "knit" around ferrite cores to form ones and zeroes. Bit twiddling anyone?