..... used this instrument of torture?
Spirule
Instructions
I still have mine, along with my slide-rule - both never used in nearly 50 years. Thank goodness for those early Hewlett-Packard HP45 Scientific Calculators. I loved the Reverse Polish Notation HP used.
Spirule
Instructions
I still have mine, along with my slide-rule - both never used in nearly 50 years. Thank goodness for those early Hewlett-Packard HP45 Scientific Calculators. I loved the Reverse Polish Notation HP used.
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