For business professiols and students, the versatile HP 30b Business Professiol 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. Fince, 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 alysis 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 interl 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 traditiol chain algebraic. Trigonometry, hyperbolic and other advanced math functions. Easily configure your display format and language preferences. For Professiols in. Fince. Insurance. Real estate. Accounting. Statistics.