PHOTO.GIF
QIPU - Peru(Inca) - about 1200
This decimal accounting and calculating device is made of linen strings originated in Peru.
The Incas used qipus to keep precise records and handle statistics. There were precise numerical meanings in the colors of the strings, the number and position of each knot and the size and spacing of groups of knots.(collection IBM Europe)
The Incas used qipus to keep precise records and handle statistics. There were precise numerical meanings in the colors of the strings, the number and position of each knot and the size and spacing of groups of knots.(collection IBM Europe)