Evolution of Desktop PCs

(generations of PC) A left-to-right timeline lineup of desktop computer designs evolving through the decades: starting with a large boxy beige tower and matching bulky CRT monitor with control knobs, followed by a slightly slimmer beige desktop tower with a chunky flat-fronted monitor, then a black or gray mid-tower case with a widescreen flat-panel monitor and visible front USB ports, then a slim modern tower with mesh vents and RGB-style accent lines paired with a thin-bezel monitor, and ending with a modern ultrabook laptop shown open at an angle. No logos or brand markings, generic computer shapes only.