The unit of calculation and logic (ALU), etc. orbital digital is that the calculus of operations, and logic do. A fundamental piece of the central processing unit in the computer. And even the most simple also has a unit of calculation and logic for such things as maintenance time. Processors available ( CPU ) , and modern, and the graphics processor ( GPU ) Dadri unit of calculation and logic a powerful and yet complex. May each piece has more than a single calculation and logic. John von Neumann proved that a mathematician the concept of the ALU in 1945, when are writing a report for a new computer called EDVAC. posed.