Featured Scientific Calculator! 
Texas Instruments VOY200/PWB Graphing Calculator

From Texas Instruments

The Voyage 200 handheld has a huge 2.7 Mb of Flash ROM, lots of pre-loaded Handheld Software Applications (Apps), and a real-time clock. Not to mention the fact that it comes with the TI Connectivity USB cable for Windows and Macintosh computers. It still contains all of the inherent functionality of the TI-92 Plus, including 3-D rotations and contour plots, symbolic manipulation, systems of equations, syntax listings, and much, much more. And the QWERTY keyboard takes the drudgery out of programming and note-taking. Mathematical expressions appear on the display the same way as they are written on the board.
Used: $49.99
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 More Excellent Scientific Calculators 
HP 35s Scientific Calculator

Get professional performance with the HP 35s Scientific Calculator. The HP 35s lets users choose between RPN or algebraic entry-system logic (no other scientific calculator offers both). It also features a large, two-line alphanumeric display to view entries, results, menus, and prompts with ease. The display also sports an adjustable contrast feature, making it ideal to use both indoors and out. A robust library of 100+ built-in functions and constants also comes pre-loaded for immediate use right out of the box. It also features a large, two-line alphanumeric display to view entries, results, menus, and prompts with ease. > Buy Now

List Price: $59.99

New: $53.65

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Sharp EL-W535B WriteView Scientific Calculator

The ELW535B performs over 300 advanced scientific functions while utilizing Sharp’s WriteView Technology. The 4-line display and multi-line playback make scientific equations easier for students to solve. It is ideal for students studying general math, algebra, geometry, trigonometry, statistics, biology, chemistry, and general science. Formulas and functions, such as fractions, are displayed on the calculator the way they are written in textbooks. The playback mode gives you the ability to recall previous equations and answers. You can also edit results and make changes to formulas easily. > Buy Now

List Price: $24.99

New: $78.95

Used: $14.00

Casio fx-300MS Scientific Calculator

The FX-300 features a two-line display and supports complex number calculations, algebra, calculus, and 18 levels of parentheses. The large, readable two-line display exhibits 10 digits, shows the problem as you write it, and then shows the answer alongside, permitting better tracking of your equation-solving process. With the Casio FX-300, if you make an input error, you can quickly clear it with the backspace key. Key in and program formulas to save for future uses. The FX-300w provides one independent and six constant memory keys. And solar power means never replacing batteries; the backup battery assures you'll always have power when you need it. > Buy Now

List Price: $21.95

New: $15.52