abacus
アバカス、算盤
Chinese Zhusuan
Chisanbop
Logical abacus
Napier's bones
Sand table
Slide rule
/suto3/google.iconabacus
/suto3/Google画像検索.iconabacus
/suto3/Google定義検索.icon abacus
/suto3/wikipedia.iconabacus
/suto3/weblio.icon abacus
/suto3/kotobank.icon abacus
/suto3/jisho.icon abacus