Before revision: ("The word abax, or abacus, is used both for the reckoning-board with its counters and the play-board with its pieces, ...").Taylor 1879:28 Abax is from the old Greek for "sand table".American Heritage:abacus Ghubar An Arabic word for sand (or dust) is ghubar (or gubar), and Western numerals (the decimal digits 0–9) are derived from the style of digits written on ghubar tables in North-West Africa and Iberia, also described as the 'West Arabic' or 'gubar' style.O'Connor, J. J., and E. F. Robertson, The Arabic numeral system URL Military use Marines view a sand table model of the operating area of Exercise Desert Punch constructed on the desert floor near Yuma, Arizona.
After revision: story.mcs.st-andrews.ac.uk/history/HistTopics/Arabic_numerals.html("The word abax, or abacus, is used both for the reckoning-board with its counters and the play-board with its pieces, ...").Taylor 1879:28 Abax is from the old Greek for "sand table".American Heritage:abacus Ghubar An Arabic word for sand (or dust) is ghubar (or gubar), and Western numerals (the decimal digits 0–9) are derived from the style of digits written on ghubar tables in North-West Africa and Iberia, also described as the 'West Arabic' or 'gubar' style.O'Connor, J. J., and E. F. Robertson, The Arabic numeral system URL Military use Marines view a sand table model of the operating area of Exercise Desert Punch constructed on the desert floor near Yuma, Arizona.