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| hp 38g | hp 39g | hp 48g+ or 48gx | hp 49g | |
| configuration | ||||
| Scientific Programmable Graphing Calculator |  |
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| User Memory | 32KB | 256KB | 128KB | 1.5MB |
| Flash ROM for future electronic software upgrades | |
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| physical features | ||||
| Color | Emerald Green | Dark Blue | Emerald Green | Light Metallic Blue |
| Carry Case | Slide-on Translucent Blue | Soft, Dark Grey Pouch | Slide-on Translucent Blue | |
| High Contrast Display | |
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| Dimensions (L x W x H) | 7.1 x 3.2 x 1.15in |
7.4 x 3.5 x 1.1 in |
7.1 x 3.2 x 1.15in |
7.4 x 3.5 x 1.1 in |
| Weight (with batteries) | 9 oz (264 g) | 9 oz (264 g) | 9 oz (264 g) | 9 oz (264 g) |
| Display Size (W x H) | 131x64 pixels |
131x64 pixels |
131x64 pixels |
131x64 pixels |
| Number of Keys | 47 | 51 | 49 | 51 |
| IR port for printing and unit-to-unit communication | |
(39G) | |
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| Expansion Ports for Memory and Application Software Cards | 2 (GX only) | |||
| Serial (RS232) port | 10-pin | 10-pin | 4-pin | 10-pin |
| operating features | ||||
| User Interface Speed | |
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| Operating Modes | Algebraic | Algebraic | RPN/ Textbook |
Algebraic/RPN/ Text book |
| Default Screen Display Modes | Algebraic only | Textbook/ Algebraic |
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| Default Screen Stack / History Display | Results | Results | Results only | Results/Objects |
| Built-in Fonts | 3 | 3 | 3 | 4 |
| Downloadable Fonts | |
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| Font Sizes | 3 | 3 | 3 | 4 |
| Cut / Paste / Copy Operations | |
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| Manipulating and Solving Sub-expressions | |
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| Catalogue of Functions | |
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| Object Storage (Variables and Directories) | No Directories |
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| Date and Time (including Alarm Set) | |
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| math features | ||||
| Built-in, Dynamic Computer Algebra System (CAS) | 40G | |
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| Mathematical Constants Library | |
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| Fractorization and Expansion | |
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| Substitution | |
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| Differentiation and Integration | |
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| Differential Equations | |
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| Solving Systems of Linear Equations | |
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| Linear Algebra and Matrices | |
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| Symbolic and Numeric Solve | |
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| Step-by-step Numeric and Symbolic Solve | |
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| Complex Arithmetic | |
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| Exponential and Logarithmic Functions | |
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| Taylor Polynomials | |
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| Lists and Sequences | |
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| Trigonometry (Trig and Hyperbolic functions, degrees, radians, gradians) | |
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| Vector Operations (absolute magnitudes, dot and cross product) | |
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| scientific features | ||||
| Built-in Equation Library | |
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| Physical Constants Library | |
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| Units-of-Measure Library | |
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| Unit Conversions | |
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| statistical features | ||||
| Inferential (hypothesis tests/confidence intervals) | |
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| Descriptive (lists, single variable, frequencies, regression, summary) | |
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| financial features | ||||
| Time-value-of-money | |
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| Amortization | |
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| customizing features | ||||
| Additional Memory Card Options | 128KB, 1MB (GX only) |
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| Supports Third Party RPL Programs, Games and Application Software | |
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| Programming Languages | HP Basic | HP Basic | RPL | RPL/Assembly/ HP Basic |
| graphing features | ||||
| Tables | |
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| 15 plot types including - Function, Parametric, Polar, Conic, Differential, Wireframe, and Statistical (Scatter, Bar and Histogram) | Basic graphing |
Basic graphing | |
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| 2D/3D Plotting | |
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| Function Analysis - Root, Extrema, Slope, Area, Intersection | |
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| Tracing and Zooming | |
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| accessories | ||||
| Overhead Display Unit (F1212A) | |
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GX Only | |
| Portable DataLab 9Firmware Systems Inc.) | |
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| PC Connectivity Kits (F1897A) | |
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Enhancements| e-mail: | kevinalcott@hotmail.com |