Textbook, computer organization and architecture, open book, wooden desk, office setting, fluorescent lighting, 3/4 composition, detailed pages, colorful diagrams, CPU illustration, bus structure, memory hierarchy, pipeline stages, ALU operation, control unit, arithmetic logic, von Neumann architecture, Harvard architecture, RISC vs CISC, instruction set, assembly language, compiler design, microarchitecture, semiconductor material, circuit board texture, depth of field, shallow focus, softbox lighting.