HP20b - Frequently-used business functions

Time Value of Money, TVM Keys: [N] [I/YR] [PV] [PMT] [FV].

Cash Flows Key: [CshFl], Net Present Value: [NPV] and Internal Rate of Return, IRR Key: [IRR].

Bonds Key: [Bond].

Depreciation Key: [Shift][Depr].

Percentage Calculation Key: [%calc].

See HP 20b Keyboard & Display Reference.