The HP 10bII is the smart choice for business and finance needs. You will be able to work quicker and more efficiently with over 100 time-saving, easily-accessible business functions. Easily calculate loan payments, interest rates and conversions, standard deviation, percent, TVM, NPV, IRR, cash flows, and more. Because it works in algebraic notation, it's easy to learn and use. With so many useful features, and an affordable price, the HP 10bII adds up to a wise investment. The HP quality keypad allows you to minimize unwanted key presses with large, soft edged keys and generous keyspacing.