Uploaded May 2025 | Updated September 2026, 2 weeks ago

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The TRS-80 Model I took the world by storm. It had a 70% market share the year it launched, and they sold 100,000 machines in 1978, far outstripping its rivals. Yet by the early 1980s Radio Shack’s line of home computers was becoming irrelevant. How did a company that hadn’t even looked at a computer a year before it launched the TRS-80 create something so highly effective on their first try, and how did it become out of date so quickly?

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Sources:
en.wikipedia.org/wiki/TRS-80
books.google.co.uk/books?id=rD0EAAAAMBAJ&pg=PA40
trs-80.org/trs80-introduction-part1
trs-80.org/trs80-introduction-part2
en.wikipedia.org/wiki/Zilog
archive.org/details/TRS80ModelIPreliminaryUsersManual
usinflationcalculator.com
apple.com/shop/buy-vision/apple-vision-pro
en.wikipedia.org/wiki/Charles_D._Tandy
archive.org/details/CreativeComputingv03n05SeptOct1977/page/n93
archive.org/details/80-microcomputing-magazine-1987-08/page/n53

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