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:max_bytes(150000):strip_icc()/GettyImages-1129764963-d92293926d704250aeb47304d6e98454.jpg "The History of Calculators and William Seward Burroughs")
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Brilliant' inventor who co-created first handheld calculator in 1967 dies | Metro News
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History Of The Calculator
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The Calculators Brief History: When was the calculator invented
Baby Calculator Company, est. 1923 - Made-in-Chicago Museum
A Brief History of the Calculator I Oxford Open Learning
