HP 20b Financial Calculator

CPU Atmel 30MHz, low-power AT91SAM7L128 ARM7 System on chip. Display 2 lines alphanumerical LCD display: First line: 8 characters scrolling display + 11 indicators. Second line: 12 +3 digit display. Adjustable contrast Entry-system logic Choice of RPN, hierarchical or chain algebraic Number entry Decimal point selection, 1000 separator selection and fix selection Menus, prompts, etc. Detailed real-text labels, menus/worksheets, prompts Languages English, French, German, Spanish Business/Finance functions TVM, IRR, NPV, NUS, amortization, depreciation, bonds, yield and accrued interest, interest conversion, list-based cashflow analysis, cashflows, break-even analysis Math/Statistics functions List-based, 1 and 2-variable statistics, Mean, standard deviation, population deviation, standard error, Forecasting, correlations and covariance, +, -, X, ÷, %, 1/x, +/- , scientific notation, n!, combinations, permutations, rounding, random numbers, LOG, LN, 10x, PL, square root, Trigonometry, probability Added features Date calculations, display format and language preferences, memory functions, editing (backspace, insert, delete), scroll keys Internal precision 15 digits Memory Stores up to 50 cash flows or statistical data items, plus 10 storage memory registers Keyboard Numeric Power/Power off Memory protection 2 x CR2032 batteries /Yes Battery life Average of 9 months Weight/Size 113.2 g/14.92 x 7.70 x 1.6 cm