2-1 ABOUT HARDWARE
Hardware in computer structure defines as those devices visible to user in contract to the invisible ones, so called software. Hardware's function differs from its structure. Printer is served for printing; motherboard is designed for computing, memorizing & logical reasoning; VGA is made for output those colorful graphics. Without spirit, human body cannot do anything meant for life. However, without software, those functions and works cannot be done. Same reason applies to either scientific world or human society.