Old professor, male, 60yo, white beard, glasses, brown suit, white shirt, tie, lecturing, pointer in hand, blackboard behind, filled with assembly codes, 80x86 instructions, computer architecture diagrams, CPU, registers, ALU, buses, memory hierarchy, von Neumann architecture, Harvard architecture, circuit boards, wires, microchips, old computer parts, dusty room, dim lighting, warm atmosphere, wooden desk, brown leather chair, many books on shelves, nostalgic feel, cinematic composition, shallow depth of field.