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Roundabout
The roundabout isn’t clever design—it’s enforced yielding, standardised in 1966, and it works only because drivers obey a single, unambiguous rule.
Deciding how strangers will share a place.
The Amiga 500 is a pivotal hardware milestone—not because it introduced new silicon, but because it delivered proven multitasking and colour graphics to mainstream retail at a time when competitors treated those features as optional or impossible in home systems. Its success relied on reuse, repackaging, and distribution—not invention.
The BBC Micro was a procurement win first, an educational tool second. It succeeded because it met rigid broadcast and policy constraints—not because it was inherently superior to alternatives. Its architecture prioritised demonstrable compliance over user flexibility. Its dominance was guaranteed by subsidy rules, not market preference.