An example of memory device is the lukasa which was used in north Congo a few centuries ago: https://en.wikipedia.org/wiki/Lukasa_(Luba) https://en.wikipedia.o

An example of memory device is the lukasa which was used in north Congo a few centuries ago: https://en.wikipedia.org/wiki/Lukasa_(Luba) https://en.wikipedia.org/wiki/Lukasa_(Luba)