Home computing pioneer Sir Clive Sinclair has died at the age of 81. His daughter Belinda Sinclair told the Guardian that the pocket calculator trailblazer and the brains behind the Spectrum home computer died at his home in London on Thursday morning. Sir Clive Sinclair launched the first affordable consumer computer in 1980, costing less than £100 ($138). The multimillionaire entrepreneur’s company launched the ZX models in a decade when personal computer use boomed. ‘Sinclair’ became the first company in the world to sell more than a million computers, making Sir Clive’s surname a household word. Belinda Sinclair told the BBC that her father had cancer for more than a decade and was still working on inventions up until last week “because that was what he loved doing.” “He was inventive and imaginative and for him it was exciting and an adventure; it was his passion,” she told the broadcaster. …