The HP 12c simulator recreates Hewlett-Packard's classic financial calculator with Reverse Polish Notation, programmable keystrokes, and the gold-trim layout familiar to accountants worldwide. Time-value-of-money registers handle n, i, PV, PMT, and FV; additional modes cover amortization, net present value, internal rate of return, depreciation, statistics, and date arithmetic.

To price a bond, enter periods until maturity, yield, and face value on the RPN stack, then tap the appropriate financial keys to solve for price or yield without reversing operand order. Amortization schedules for a 48-month car loan at 1.2% per month can be inspected period by period using built-in AMORT functions, mirroring the hardware manual workflows students still learn in corporate finance courses.

Every operation runs client-side with decimal.js for faithful decimal behavior, and the widget persists stack and memory registers in localStorage between sessions. The interface stays left-to-right even when the site locale is Arabic, preventing mirrored key labels. This simulator is for education and nostalgia—not a replacement for audited production systems or regulatory reporting.