The strange thing I just read:
“His inventions included groundbreaking pocket calculators, an early electric vehicle, and the legendary ZX Spectrum home computer — although Sinclair himself preferred to use a slide rule”
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And he reinvented the notion of what would be acceptable as a computer keyboard 
ah yes the rubbery old keys of the ZX 48.
Thanks for sharing @ClaudioPorcellana I didn’t know that. Exceptional time in England that was and RIP Sir Clive.
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I had a ZX Spectrum 48 for many years. And when you mention the rubbery keys I look in front of me at the Akai Fire midi-interface for FL-Studio and I guess Sir Clive was very much ahead of his time.
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