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Computer pioneer and inventor Sir Clive Sinclair has died at age 81 at his London home. His daughter said he passed away on Thursday after living with cancer for over a decade. Sir Clive launched the first affordable consumer computer in 1980, costing less than £100. Sinclair became the first company in the world to sell more than a million computers. The entrepreneur was the mastermind behind many other gadgets including the pocket calculator, pocket television and Sinclair C5 electric tricycle. Sir Clive leaves behind 3 children, 5 grandchildren and 2 great-grandchildren. .