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For a company that couldn't market its way out of a paper bag nor plan a strategy to save its life, Acorn has done remarkably well in the afterlife. On the back of the phenomenal success of the BBC Micro in the early 1980s, the famous NIH (Not Invented Here) spirit of the Cambridge computer community made the company turn its back on other processors and build its own, the Acorn Risc Machine. The subsequent line of Archimedes PCs flopped, but the ARM chip turned out to be just the thing for embedded computing. With around 75 percent of 32-bit embedded chips worldwide, ARM can afford posh offices in the Cambridge countryside.
Real-life visiting potential: 5/10. Check out Cambridge instead, where they invented the electron in a rather nice pub.