Hewlett-Packard Financial Calculator, 5-1/10"x3-1/10"x3/5, Platinum Platinum 25th Anniversary Calculator features include over 130 built-in functions and allows 30 different cash flows for internal rate of return and net present values. Calculates loan and mortgage payments, converts interest rates, figures bond prices and yields. Includes algebraic entry mode. Through keystroke programming, user enters up to 400 keystrokes into memory and then executes with the push of a single button.