Graphing calculator is designed for surveying, engineering, math and science professionals and students. Features a large equation library, more than 2,300 built-in functions, 75Mhz ARM9 processor, a SD card slot with formatting functions, RPN, Algebraic and Textbook data entry, large high-contrast screen (9 lines x 33 characters), serial port and plastic casing. Easily performs complex arithmetic and calculus functions with advanced Computer Algebra System (CAS). Calculate advanced expressions and view solutions in 2-D or 3-D graphical representation. 2.5MB total memory includes 512KB RAM plus 2MB flash ROM for performing future upgrades. Enhanced HP keypad with redefinable keyboard and menu keys reduces keying errors. Customize data with four font sizes and styles. HP Solve application allows you to type and store an equation, then use to solve any variable. Calculator includes a USB connectivity kit with USB cable, connectivity software and pouch. Runs on four AAA batteries.

The 12-digit P170-DH calculator incorporates two-color, high-speed printing, and a nonadd print key for dates and reference numbers. Print 2.3 lines per second with positive numbers in black and negative numbers in red. Design features an extra-large, high-angled fluorescent display and quiet serial impact printer with ink roller. Functions include time calculation, profit margin calculation, clock/calendar function, quick tax calculation, decimal positions (+, 0, 1, 2, 3, 4, floating), round up/off/down switch, sign change, item count, markup/markdown, memory, add mode and grand total. Calculator uses a 2-1/4" (57mm) wide plain paper roll and weighs 2 lb.

Professional Calculator features a 12-digit, large, easy-to-read display as well as two-color printing and display and tax and exchange functions. The two-color ink ribbon printer prints 3.5 lines per second. Offers built-in tax and exchange function. Full decimal system: floating, fixed (0-6) with round-off, round-up or cut-off, and ADD mode. Mark-up/down key. Right shift key for quick correction. Independent memory. AC operation.

Heavy-duty commercial calculator features a built-in, multi-angle kickstand to customize the angle to your personal preference. Print 4.3 lines per second in two colors with positive numbers in black and negative numbers in red. Design also includes an easy-to-read, extra-large, 12-digit display and two independent four-key memories. Sales tax rates can be easily stored and accessed. Functions include cost/sell/margin, 5/4 rounding, round up/down/off, item count, grand total, delta percent, auto decimal entry, mark-up/down, percent key, percent add-on/discount and variable decimal (add mode, 0, 2, 3, 4, 6, and floating). Calculator uses 2-1/4" paper and runs on AC power.

An essential handheld calculator combines convenience and high-performance. Handheld calculator displays up to eight digits. Soft, rubber keys allow you to accurately punch the correct numbers. Four-function memory is great for tedious calculations, such as square roots or long division. Using both solar and battery power, this calculator will work anywhere you are. Handheld calculator also features percentage key, square root key and memory recall key.

8-Digit Calculator, Display Desktop Features an eight-digit LCD display with independent memory, auto constant, percent key, percent add-on/discount, GPM, +/- (change sign key), three key memory. Solar power with battery backup. Large, easy-to-read PC Touch Keyboard with modern casing and angled display.

Heavy-duty printing calculator features a 14-digit, two-color illuminated display. Print 4.3 lines per second with the high-speed, two-color ink ribbon. Positive numbers are printed in black, and negative numbers are printed in red. Functions include Change, currency conversion, tax calculation tip, cost/sell/margin, double/triple zero keys, up/off/down rounding, item count, memory and grand total. Decimals are at 0, 2, 3, 4, 6, add mode and F (floating). Calculator runs on AC power.

Desktop tax calculator features eight digits (16-digit approximations), large easy-to-read display, and tax and currency exchange function. Other functions include constants for addition, subtraction, multiplication, division; independent memory, markup percent and three-digit comma markers. Calculator runs on solar power with mercury-free battery backup.

With Solar Plus and Tax Calculations, this handheld calculator is the perfect tool for traveling professionals. It provides a large 10-digit display for excellent readability. Functions include tax calculations, independent memory, profit margin percentage, change sign (+/-), percent key, grand total, key rollover, decimal selector (floating or fixed 0, 1, 2, 3, 4) and ADD mode. Calculator with plastic keys operates on solar power with battery backup.