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Calculators you regret buying?
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Calculators you regret buying?
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Calculators you regret buying?
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08-21-2024, 04:15 PM
(This post was last modified: 08-21-2024 04:22 PM by AnnoyedOne.)
Post: #47
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RE: Calculators you regret buying?
A National Semiconductor NS-108 (to replace a TI-30) in 1980. Not bad and had built-in keys for calculating Normal Distribution probabilities. However it only lasted some 9 months due to a mechanical power switch failure. A poor design.
I bought a second hand TI-55 (LED) to replace it. That lasted years until I bought a new HP-15C. A1 HP-15C (2234A02xxx), HP-16C (2403A02xxx), HP-15C CE (9CJ323-03xxx), HP-20S (2844A16xxx), HP-12C+ (9CJ251) |
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