Sinclair Scientific calculator photographed c. 1974
The Sinclair Scientific calculator
was a 12-function, pocket-sized scientific calculator
introduced in 1974, dramatically undercutting in price other calculators available at the time. The Sinclair Scientific Programmable
, released a year later, was advertised as the first budget programmable calculator.
Significant modifications to the algorithms
used meant that a chipset
intended for a four-function calculator was able to process scientific functions
, but at the cost of reduced speed and accuracy. Compared to contemporary scientific calculators, some functions were slow to execute, and others had limited accuracy or gave the wrong answer, but the cost of the Sinclair was a fraction of the cost of competing calculators. (Full article...