This was “a device made of a main cord with smaller varicolored cords attached and knotted and used by the ancient Peruvians ” as a memory aid for assigned keepers of inventories and records. — Webster’s Ninth New Collegiate Dictionary.
वे इसे सामान - सूची और रिकार्ड रखनेवालों के लिए स्मरण सहायक के रूप में प्रयोग करते थे ।