DESC: The ultimate graphing calculator for surveying, engineering, math and science professionals and students is even better. The new HP 50g graphing calculator features an SD card slot with formatting functions, RPN~, Algebraic and Textbook data entry, the largest high-contrast screen with more usable space than ever, RS232 and USB and connectivity. Plus, HP Solve, structured programming and Computer Algebra System (CAS). You also get the reassurance of award-winning HP support 24-hours a day.