The Sharp EL-811, released in March 1972, was one of the first hand-held, battery-powered calculators with memory function. It was the follow on to Sharp's EL-8, which is recognised as the first truly portable electronic calculator. The EL-811 was smaller than the EL-8 but also included additional functions, including memory, as even though there was only about 18 months in between the two different models being released, significant advancements were being made in integrated circuits technology at the time.

The calculator is a four-function calculator with additional memory function. It features an eight-digit green fluorescent tube (VFD) display. Multiplication and division equations are performed to 16 digits, and the lower eight digits are shown by pressing the arrow key. The calculator is powered by six rechargeable AA batteries.

The Prinztronic MC85 and Prinztronic MC95 are all similar, early hand-held calculators made by Sharp, though they have some significant differences. Further information can be found at http://www.vintagecalculators.com/html/sharp_el-811_-_derivatives.html

Our EL-811A is complete with soft cases and AC adaptor. It was very kindly donated by Sharard and Sheila Wilson.

Manufacturer: Sharp
Date: 1972

This exhibit has a reference ID of CH26470. Please quote this reference ID in any communication with the Centre for Computing History.

Click on the Image(s) For Detail