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SHARP: EL509
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AKA: Scientific calculator, EL-509, AUTO POWER OFF, AKA (Label): ELECTRONIC CALCULATOR, EL-509, Product number (P/N): EL509 (EL-509),
Keywords/Tags: EL509 (EL-509) | 509 | Scientific Calculator
Date of intro: ~1981, Origin: Japan (List),
Power: 3V: (LR44 x2),
Display: Type = Display (LCD) (List), Digits = 5+1+(2+1),
Number of keys: 35,
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Patents: 3902169(US); 3976994(US),
Related with: SHARP_docu: (Cat.) 198202 (Japanese),
Initial Cost Price: 4 700 JPY (38,07 ), Collector value: 7/10,
Courtesy of: STROUP David,

Item

Label / Bottom
(Courtesy of: STROUP David)

Created: 18-dec-2016, Manual-update: 07-mar-2020, Batch-update: 17-jun-2021             

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