How the Abacus Became a Worldwide Phenomenon算盘如何走向世界

The abacus1 has been used in China for millennia， and although its popularity has declined since the invention of hand-held electronic calculators in the 1970s， it remains in widespread use among traders and clerks in Asia and Africa， in shops， restaurants and street stalls. Family-owned stores in Hong Kong and Macao， particularly those selling traditional Chinese medicine， use abacuses， and it is much the same in Chinatowns in North America.

算盘在中国有数千年历史。（剩余9448字）