The control section directs the flow of traffic (operations) and data. Also it maintains order within the computer. The control section chooses one program statement at a time from the program storage area and then interprets the statement, and sends the suitable electronic impulses to the arithmetic-logic and storage sections so they can carry out the instructions. The control section does not carry out actual processing operations on the data. Control section instructs the input device on when to begin and stop transferring data to the input storage area. It also commands the output device when to begin and stop receiving data from the output storage area.