A block diagram of registration shows data and control flow in an efficient way. Instead of creating a registration block diagram from scratch, use EdrawMax pre-defined templates as it provides the right facts and figures that ease the entire process. As shown in the registration block diagram, this method is used to represent systems and their shiftings. For representing any system using a block diagram, it is necessary to find the transfer function of the system. A registration block diagram usually has a main memory function, a control unit, and an arithmetic & logic unit that takes the data or information from the input device like a keyboard or mouse. The computer block diagram shows how the CPU performs the logic and prints the result on the output devices like an LCD screen or a printer.