The Sharp EL-8131 is a 1978 electronic calculator.

Size (approx):  80mm x 131mm x 21mm (max)  (w,h,d)
Weight: 138g excluding batteries
Power: 3V DC, 2 x AA size battery.  Also accepts adapter (EA-17E) which can be used as a charger.  Socket at top side on the left.  Consumption 0.35W.  Back says use rechargeable battery EA-18B, 2.4V.  Mangan [sic] batteries are quoted as lasting 14 hours continuous use. The on/off switch is on the left hand side in line with the Sharp logo.
Case: Slim two piece plastic case, the front being micro-lined black plastic and the back smooth white plastic. Small brushed aluminium plate above the display is printed white and red for the company name and model number.  Above it sits a metallic sticker for "Made in Korea".  A green plastic display filter has the reminder for error, memory and minus printed underneath. It is flat and flush with its own black plastic escutcheon with silver trim and gives a reasonable display. The keys are squishy but work well.
Display: 8 digit green VFD with a ninth (right-most) digit used for minus, memory and error indictors
Features: 4 function calculator with percentages, square root, register exchange and four function memory
Age: 1979
Manufacturer: Sharp Corporation. Made in Japan. Serial number 98013114 is on a sticker on the inside of the battery compartment as well as on the box.

Our calculator was kindly donated by John Penn-Simkins

Manufacturer: Sharp
Date: 1979

This exhibit has a reference ID of CH5104. Please quote this reference ID in any communication with the Centre for Computing History.

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