HP 50g Graphing Calculator New display upgrade--the new HP 50g display features a 30% increase in usable space over the HP 49g+ New powerful SD card slot allows you to format your card right in the calculator and expand memory Massive 2.5 MB total memory--512 KB RAM plus 2 MB flash ROM for performing future upgrades** New larger equation library and 2300+ built-in functions--ideal for both professionals and students The choice of efficient RPN, Textbook or Algebraic data entry