HP 50g Graphing Calculator: * Operating features: Entry Logic: Algebraic/RPN/textbook, Menus, prompts, Alpha messages, Soft-keys, Numerical precision: intermediate and internal: 15 digits, exponent: -49999 to +49999, Displayed precision: 2 digits, exponent: -499 to +499, infinite for integers (limited by memory), Additional applications available on Internet * Configuration: Flash ROM for future electronic software upgrades, RAM 512 KB + 2 MB flash ROM, Redefinable menu keys, Redefinable keyboard (user mode), Peripherals, Supports libraries/RPL programs * Vector operations: Rectangular/polar, Matrix operations: Includes symbolic matrices, Matrix editor * Graphing features: 2-D function, polar, parametric plot, 3-D, differential equation, bar plot, Histogram, scatter plot, Find: intersect, extremum, slope, area, Zoom, trace, co-ordinates, shade * Math features: +, , x, , v, 1/x, +/ , In, ex, xvy, yx, LOG, 10x, x2, %, p, n!, Fractions, Degrees, radians or grads mode, Trigonometric functions/inverses, Hyperbolic/inverses, HP Solve application (root finder), Numeric Integration, Symbolic integration, Numeric differentiation, Symbolic differentiation, Complex number functions, Polynomial root finder, Taylor series, Absolute value, round, Integer & fractional part of a number, Modulo function, floor, ceiling, CAS system * Scientific features: Decimal hr/hr min sec conversions, Polar/rectangular conversions, Angle conversions, Base conversions and arithmetic, Unit conversions, Bit, boolean, graphics, Display and printer graphics, Built-in equation library * Statistical features: S x, S x2, S y, S y2, S xy, Sample standard deviation, mean, Population standard deviation, Linear regression, Combinations, permutations, Weighed mean, Edit, save, name, list, Curve fit (LIN, LOG, EXP, POW), Plot statistical data, Hypothesis tests, Confidence intervals * Programming features: Root finder: HP Solve, Number of steps/regs or bytes: 1.2 MB, Number of programs/formulae:++, Levels of subroutines:++, Branching, Flags:256, Alpha prompts in programs, Input forms, alpha string manipulation, Indirect addressing, Index looping, Alpha listing, HP Equation library, over 300 physics equations and graphics * Electronic specifications: CPU: 75 Mhz ARM9, Display size: 131 x 80 pixels, Display type: Pixel, Memory RAM: 512 KB, 2 MB Flash ROM**, IR port: IrDA (limited to 10 cm distance), Serial port: USB, RS232 for connections to equipment such as PCs, data loggers, surveying equipment, etc. Expansion port: SD card slot, Power supply: AAA x 4 + CR2032 * Material specifications: Enclosure/key top material: Plastic/plastic, Size (L x W x D): 7.24 x 3.43 x .93 in (18.4 x 8.7 x 2.35 cm), Weight: Approximately 220 g