A foundational computer system architecture diagram maps the core hardware components and data pathways in a modern computing system. The CPU serves as the central processing hub, interfacing with RAM for active memory operations, GPU for graphics acceleration, and storage devices (HDD/SSD) for persistent data. Input devices feed data through the CPU to output devices, while the motherboard system bus interconnects all major components including the power supply and network interface. This reference architecture helps students, educators, and technical writers understand how hardware components communicate and collaborate to execute programs. Fork this diagram on Diagrams.so to customize component labels, add peripheral devices, or create variations for embedded systems and specialized computing architectures.