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HP-42S
HP 42S not working anymore. Literally was using it 2 hours ago and when I turned it on I got this. Can someone help? : r/calculators
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HP-42S
HP-42S memory upgrade and overclock
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Posts on topic: HP42s - Calculator blog - TheCalculatorStore
File:Hp42s battery compartment.jpeg - Wikimedia Commons
Posts on topic: HP42s - Calculator blog - TheCalculatorStore
Free42 : An HP-42S Calculator Simulator
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HP-42S Scientific Calculator
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