Financial calculator Financial calculator A financial calculator or business calculator is an electronic calculator that performs financial functions commonly needed in business and commerce communities (simple interest, compound interest, cash flow, amortization, conversion, cost/sell/margin, etc). It has standalone keys for many financial calculations and functions, making such calculations more direct than on standard calculators. It may be user programmable, allowing the user to add functions that the manufacturer has not provided by default. Examples of financial calculators are the HP 12C, HP-10B and the TI BA II. Wide number of graphics calculators like Casio fx-9860GII, Texas Instruments TI-89 Titanium, Hewlett Packard HP-48GII,
Pascal's calculator that could multiply automatically while sitting on top of the Pascaline, assuming (wrongly) that all the dials on Pascal's calculator could be operated at the same time. Even though this could not be done, it was the first time that a pinwheel was described and used in the drawing of a calculator. He then devised a competing design, the Stepped Reckoner which was meant to perform additions, subtractions and multiplications automatically and division under operator control. Leibniz struggled for forty years to perfect this design and produced two machines, one in 1694 and one in 1706. Only the machine built