A yupana (from Quechua: yupay 'count') is an abacus used to perform arithmetic operations, dating back to the time of the Incas. (Wikipedia).
From playlist Music [Easy]
Inca counting boards and the table yupana
The table yupana artifacts from the Inca empire. These are often thought to be sophisticated counting boards, but there really isn't any evidence of that. Thanks to Cinzia Florio for helping to answer some of my questions. This is episode 67 of my video series about old calculating devi
From playlist Calculating Devices Review / HowTos
History of Mathematics Project: Computable & Interactive Virtual Exhibits of Mathematical Artifacts
The History of Mathematics Project, (website here https://history-of-mathematics.org/) is a virtual gallery of exhibits highlighting physical artifacts that are important to the history of mathematics. Extensive computational explanations and interactive content make use of the Wolfram Lan
From playlist Wolfram Technology Conference 2020