It reminds me of the Lukasa which was used in the Congo river basin around the XVII century. But indeed it use a fundamentally different principle than Quipu. h

It reminds me of the Lukasa which was used in the Congo river basin around the XVII century. But indeed it use a fundamentally different principle than Quipu. https://en.wikipedia.org/wiki/Lukasa_(Luba) https://en.wikipedia.org/wiki/Lukasa_(Luba) The Lukasa performs many mnemonic functions, and although all memory cards share some common information, certain types of memory cards are used to communicate specialized or elite-specific data. It uses multicolored beads, shells and bits of metal, or are incised or embossed with carved symbols.