Sinclair Scientific [SEP] service entry
Sinclair Scientific
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
brackets, and the associated recursive logic, was not necessary to implement in the hardware, but the effort was instead offloaded to the user. Instead of an "Equals" button, there is an "Enter" button that tells the calculator when a value has been entered, and then the operators are entered in after the operands. For example, on some devices to evaluate "(1+2) x 3", the sequence entered would be "3 enter 2 enter 1 + x." The Sinclair Scientific entry