he abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere. The user of an abacus is called an abacist.Japanese abacus, Russian abacus, There're many kinds of abacus produced in many different countries,such as Roman abacus, Chinese abacus,School abacus,etc. This app collects several kinds of abacus and put them into a single app. For more educational or musical apps, please follow us on twitter: @meetstudio or visit our website: http://www.meet-future.com Promo codes here: KEELYNX639XT 6YJRR477WTRE ERJPX36EW7FF 73XREJ49ETWF WN63X7HY94PJ RRAJR7WMXLLM 3NJXY7P4HTTM 3M46MML9T6RF 93RTJF4X7FLM TEEM9MTHJPWL P7LTLFJ39X6X 9XFTXN7HXR3A KXK37H9RY7LW KT7NTLAA6P77 JHT7ANHYJ4FH XYPPPFXFKTPJ F9J7MNT6NRFJ AHPKALLT9MLP YJWKE7TMKHX6 PAPPJ97EX9W7 X4J9HMRK6YMX JN6RLWR7HJ4J 4TH6YNRAN7EL JAPL9NPFEX46 H9TEPPAEWK3N WRY3A94YMNMF HN7NE77L3J6M YKPXEYHK3YN4 XNYFAL4EXTTR NEK99RTXM7J3 FLF73MJ74NYK 7RAX74AFRW9N R7TYN7TN3NEK 46RLWEXJ3X9X PEWLLY7N4HFX P3H74K94X47M ENL96E7FRHMA 69WT6YY77AJW YKF6TWALN4RM XNTYXR779A3Y RMTW7KRT4376 FEPRM3X7FA9E 3X6KWMFWYY4E 7TYYT4AJFN3T WYL6RHLRMX3X 97JRPFLTY477