Digital system, computer architecture book, 2nd edition, chapter 4 illustration, colorful diagrams, technical drawings, CPU components, ALU, registers, buses, control unit, instruction cycle, von Neumann architecture, Harvard architecture, pipelining, cache memory, main memory, I/O devices, system interconnects, modern office background, wooden desk, laptop, notebooks, pens, highlighters, warm lighting, soft focus, shallow depth of field, detailed textures.