Old leather-bound book, computer architecture and design, PDF format, opened on wooden desk, warm softbox lighting, cluttered workspace, scattered papers, pens, and notes, coffee cup stain on the corner, worn-out ergonomic chair in the background, messy room with old computers and wires, solo male programmer, 30s, beard, glasses, worn-out T-shirt, jeans, sneakers, focused expression, leaning forward, hands on keyboard, coding, nighttime, rainy window, cityscape outside.