Calculators replaced slide rules while I studied engineering at Purdue University.
HP-35 scientific calculator with rpn notation (but no programming)
HP-65 handheld with a magnetic strip reader.
HP-25 second-generation handheld.
Handheld CalculatorsCalculators replaced slide rules while I studied engineering at Purdue University.
HP-35 scientific calculator with rpn notation (but no programming)
HP-65 handheld with a magnetic strip reader.
HP-25 second-generation handheld.