A monitor block diagram usually has ROM or RAM, a central processing unit, a control unit, and an arithmetic & logic unit that takes the data or information from the input device like a keyboard or mouse. The monitor block diagram shows how the CPU performs the logic and prints the result on the output devices like LCD monitors or printers. A monitor block diagram shows the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. Instead of creating monitor block diagrams from scratch, use EdrawMax pre-defined templates as it provides the correct facts and figures that ease the entire process.