Curta

The Curta is a small, portable mechanical calculator that was invented by the Austrian engineer Victor G. Sch alleger in the 1930s. It is notable for its compact design and efficiency, resembling a pepper grinder in appearance. The Curta can perform basic arithmetic operations such as addition, subtraction, multiplication, and division. The device works using a system of gears and rotary mechanisms, allowing calculations to be made quickly and inexpensively.