Addiator decimal adding machine with stylus and pencil on a metal stand. Made by the Addiator-Gesellshaft Company of Berlin, the Addiator was a...計數機
Made by the Reliable Typewriter and Adding Machine Company of Chicago, USA, the Addometer was a popular adding machine based on Blaise Pascal's...
This mechanical calculator was an invaluable machine for railway office workers dealing with finances or statistics, and was widely used during the...計數機
The mechanical calculator was an invaluable machine for office workers dealing with finances or statistics, and was widely used during the first half...白領階級, 辦公室, 英國
woman sitting at desk with adding machine and laptop, printout tape wrapped around head - 加數機紙卷 個照片及圖片檔財經顧問, 幽默
