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| hp 6s solar | hp 20s | hp 30s | hp 32sii | |
| physical features | ||||
| Display Type | Segment | Segment | Pixel/Segment | Pixel |
| Display Size | 1-line x 10 char. |
1-line x 12 char. |
2-line x 10 char. |
1-line x 12 char. |
| operating features | ||||
| Entry Logic | Algebraic | Algebraic | Algebraic | RPN |
| Menus, prompts |  |
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| Alpha Messages | |
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| Numeric precision intermediate /displayed | 10/12 digits | 12/12 digits | 10/24 digits | 12/12 digits |
| Numeric precision - exponent | +/-99 | +/-499 | +/-99 | +/-499 |
| math features | ||||
| +,-,*,÷,sq'root, 1/x,±,ln,ex |
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| XrootY | |
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| yx,log,10x,x²,%,pi,n! | |
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| % change, % total | |
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| Fractions | |
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| Degrees, radians or grads mode | |
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| Trigonometric functions/inverses | |
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| Hyperbolics/inverses | |
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| HP Solve application (root finder) | + | |
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| Numeric integration | + | |
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| Complex number functions | + | |
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| Polynomial root finder, Taylor series | |
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| Absolute value, round, floor, ceiling | |
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| Integer & fractional part of a number | |
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| Modulo function | |
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| vector operations | ||||
| Matrix Operations | + | |||
| scientific features | ||||
| Decimal hrs/hrs min sec conversions | |
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| Polar/rectangular conversions | |
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| Angle conversions | |
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| Base conversions & arithmetic | |
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| Unit conversions | |
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| Bit, Boolean operators | |
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| statistical features | ||||
| Total, sumX, sumX2, sumY, sumY2, sumXY | Cumlative (single variable) |
Cumulative | Cumulative | Cumulative |
| Sample standard deviation, mean | |
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| Population standard deviation | |
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| Linear regression | |
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| Combinations, permutations | |
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| Weighted mean | |
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| Curve fit (LIN, LOG, EXP, POW) | + | + | ||
| customizing features | ||||
| Root Finder | + | HP Solve | HP Solve | |
| Number of steps/regs or bytes |
99 steps /10 regs |
120 bytes /10regs |
384 bytes /33regs |
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| Number of programs/ formulas | 16 | 27 | ||
| Levels of subroutines | 4 | 7 | ||
| Branching | |
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| Flags | 12 | |||
| Alpha prompts in programs | |
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| Indirect addressing | |
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| Indexed looping | |
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| Solve for any variable | |
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| Alpha listings | |
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| Built in programs/equations | 6 | |||
| e-mail: | kevinalcott@hotmail.com |