For business professionals and students, the versatile HP 30b Business Professional has an intuitive layout, high-speed processor and 2-line display for fast answers. Add custom calculations for school or work with convenient programming capability. Feature-packed and programmable. Finance, business and real estate functions in a simple intuitive layout at your finger tips. Quickly program custom calculations for time-saving access later. Powerful math library including trigonometric and hyperbolic functions. Useful business functions, including interest conversion and a dedicated key for amortization. Extensive statistical functions: 9 statistical models, 15 statistical analysis functions, including advanced probability distribution. Comfortable and stylish. Raised edges protect keyboard and screen. Tapered sides for comfortable feel. Fast and dependable. New high-speed CPU provides fast results and 15-digit internal accuracy. HP legendary heritage of quality and reliability. HP’s "rotate-and-click" keyboard technology for accuracy and reliability. Large 2-line display. View large numbers (up to 12 digits). Scroll through variables, detailed labels, menus and prompts (up to 8 characters). Choice. Time-saving RPN entry, familiar algebraic, or traditional chain algebraic. Trigonometry, hyperbolic and other advanced math functions. Easily configure your display format and language preferences. For Professionals in. Finance. Insurance. Real estate. Accounting. Statistics.