 It was advertised as "the first ... calculator to offer a ... programming facility ... at a price within the reach of the general public," but was limited by having only 24 program steps.Both the Sinclair Scientific and the Sinclair Scientific Programmable were manufactured in England, like all other Sinclair calculators except the Sinclair President.The HP-35 used five chips, and had a been developed by twenty engineers at a cost of a million dollars, leading the Texas Instruments engineers to think that Sinclair's aim to build a scientific calculator around the TMS0805 chip, which could barely handle four-function arithmetic, was impossible.