 
With exclusive features like interchangeable bezels and easy-to-use algebraic entry, the HP 30S is the complete, user-friendly scientific calculator. HP quality keypad allows you to minimize unwanted key presses with large soft edged keys and generous key spacing.
Features
- Two interchangeable colored faceplates
- Two-line display
- Editable command line history
- Constant mode: Improved constant mode allows the appending of any combination of numbers, variables, functions and operators
- Conversions: The HP 30S includes not only the standard ability to convert fractions to decimals, but also the ability to convert decimals to fractions. It also handles conversions for a variety of units, both metric and imperial
- Equation Solver: Allows you to quickly solve both quadratic and linear simultaneous equations without tedious calculations
- 250 built-in functions
- 10 memory registers
- Calculate not only percentage but also percentage change
- Evaluation of expressions involving multiple variables
- Common physical constants on demand
- Evaluation to an internal precision of 24 significant figures
- Thousands separator
- 16 number of pending operations
- Fractions and fraction/decimal conversions
- Trigonometric functions: ex, ln, 10x, log, p, 1/x, n!
- Universal powers and roots
- Polar/rectangular conversions
- Statistical Features: Univariate and bivariate statistics, including the ability to edit data sets at any time
- Science Features: Unit conversion, 11 physical constants
- Subject Suitability: General Math, Pre-algebra, Algebra, Geometry, Trigonometry, Statistics, Physical Sciences, Biology, Chemistry, Physics
- Weight (with batteries): 4.75oz (135g)
- 2 x LR 44 batteries
- 7x5 dot matrix plus 7-segment LCD display
- Size: (LxWxD): 6.1 x 3.2 x 0.05 in (155mm x 81mm x 13.8mm)
- Hard cover
- Test Suitability Permitted for use on College Board* Tests: AP*, SAT* and PSAT/NMSQT. (* College Board, AP and SAT are registered trademarks of the College Entrance Examination Board).
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One Plus One - Advanced Scientific Calculator for Palm Pilot
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