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His own electronic kits by mail order and writing technical manuals. he then put a magnifying bubble over each digit to make it visible. an obsession with miniaturisation saw him launch the word's fist slimline pocket calculator in 1972. soon though, competition from cheaperjapanese versions forced sinclair to slash his prices. then the failure of his next innovation, a digital watch, brought his company to its knees. undaunted, he set up sinclair research and in 1980 launched a ground—breaking personal computer, the zx 80. it sold for under £100. it was the zx spectrum with its colour disp...

Rory cellan—jones reports. his drive and enthusiasm made him one of britain's best known inventors. the whole business of invention is a non—material thing. it's very hard to know why it gives such pleasure. clive sinclair's fascination with gadgets started at school and, by his late teens, he was selling his own electronic kits by mail order and writing technical manuals. he then put a magnifying bubble over each digit to make it visible. an obsession with miniaturisation saw him launch the world's fist saw him launch the world's first slimline pocket calculator in 1972. soon though, comp...

The multimillionaire entrepreneur launched the first affordable consumer computer in 1980.

The multimillionaire entrepreneur launched the first affordable consumer computer in 1980.

The multimillionaire entrepreneur launched the first affordable consumer computer in 1980.