The Sinclair President is a calculator released by Sinclair Radionics in early 1978. There were two models, the President and the President Scientific. They were among the last calculators produced by Sinclair, and their large size was in contrast to the smaller, earlier models, like the Sinclair Executive, which made the company famous. The President models were related to the Sporting Life SETTLER, a calculator designed specifically for betting shops.

History

It was launched in early 1978, at the price of . It was the only Sinclair calculator not made in

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, but instead made in

Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ...

by Radofin. Competition in the calculator market was by this point fierce, and the Sinclair did not fare well against cheaper Japanese calculators with more efficient

liquid-crystal display A liquid-crystal display (LCD) is a flat-panel display A flat-panel display (FPD) is an electronic display used to display visual content such as text or images. It is present in consumer, medical, transportation, and industrial equipmen ...

s. The silver paint used was of poor quality, and was notorious for wearing off.

Design

Both models were the same size, and intended for desktop use, being slightly too large to be readily portable at . Power was supplied by 2x AA batteries. The screens were eight digit

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s, which resulted in a higher power consumption than a calculator with a

. The President, as well as addition, subtraction, multiplication and division, had percentage, memory, square root and square functions. It was powered by a

National Semiconductor National Semiconductor was an American semiconductor manufacturer which specialized in analog devices and subsystems, formerly with headquarters in Santa Clara, California. The company produced power management integrated circuits, display drive ...

MM57134ENW/M integrated circuit. The President Scientific added logarithmic and trigonometric functions. It was powered by a General Instrument CF-599.

Sporting Life Settler

The Sporting Life SETTLER was a calculator designed for betting shops, with development sponsored by '' Sporting Life''. Due to the increased pressure on the calculator market, a number of calculators meant for a specific purpose where there was less competition were produced. The Settler had National Semiconductor DS8881N and MM5799NBX/N circuits, and was slightly larger than the President, at . It was also produced in Hong Kong by Radofin.

References

{{Sinclair calculators Sinclair calculators