![]() Display: LCD with 2 lines x 14 characters adjustable contrast Hewlett Packard HP 42S RPN Scientific Calculator W/ Case - EXCELLENT CONDITION 249.99 Free shipping Free shipping Free shipping HP 42S RPN Scientific Calculator with a Case 190.00 0 bids 3d 9h +10.00 shipping Best Selling in Calculators See all Texas Instruments TI-84 Plus CE Graphing Calculator - Black (3) 78.99 New 63.It was the worlds first handheld scientific calculator. The HP-35 Scientific Calculator was the worlds first handheld scientific calculator and HPs first product that contained both integrated circuits and LEDs. ![]() The HP-35 Scientific Calculator, so called because it had 35 keys, was introduced in 1972. Power: 2 x CR2032 batteries battery life: 0.73 year 1 hr/day (approximately 9 months) The HP-35 Scientific Calculator was the worlds first handheld scientific calculator and HPs first product that contained both integrated circuits and LEDs. ![]()
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