With its 128K total memory (80.7KB available to the user), huge built-in constant library and structured programming for creating applications, the HP 48gII keeps reliable, high-level assistance at hand for demanding engineering and surveying applications. Customize your input by choosing familiar textbook, traditional algebraic or efficient RPN entry modes. If your classroom or lab work requires communication for experiments, this is your tool: It features a convenient serial port interface. View 3D graphs and 2-and 3-D plots and other functions with ease on the comfortably-sized display.