As your calculations become more and more intricate, the HP 40gs makes solving them easy with a built-in Computer Algebra System (CAS). CAS delivers dynamic symbolic manipulation and numeric solving so you can easily perform complex arithmetric or calculus functions.

Easy programming to create custom aplets using formulas and equations, to assist with learning Interactive history, notes and sketch capabilities to review and interact with data

Built for performance Dynamic split screen with adjustable contrast for greater readability 256KB total memory for greater storage capacity and increased performance 600+ built-in functions plus powerful HP Solve and other innovative applications

Built-in library of 29 constants and easy metric unit conversions- ideal for math and science USB or serial ports for connecting to PCs and other devices to download, print and share data Enhanced HP keypad for greater comfort and reduced keying errors Slide-on hard cover included for greater protection and portability Math features include:

•Algebra features: factorization, expansion, substitution, systems of linear equations, linear algebra and matrices, among others
•Trigonometry (trigonometry functions/inverses and Hyperbolic functions/inverses, degrees, radians)
•Lists and sequences
•Exponential and logarithmic functions •Permutations, combinations and factorials •HP equation solver
•Metric/ imperial conversions •+, -, ×, ÷, √, 1/ ×, +/-, In, e, x •y , LOG, 10 , x , %, ? , n!
•Fractions
•Degrees, radians, or grads mode
•CAS system
•Numeric integration
•Symbolic integration
•Numeric differentiation
•Symbolic differentiation
•Complex number functions
•Taylor series
•Expanded plotting possibilities-function, parametric, polar, conic, sequence and statistical plots •Functional analysis-root, extremum, slope, area and intersection
•Plotting with tracing and zooming Graphic, symbolic and numeric views

Specifications

CPU:      CPU: 75Mhz ARM9
Display size:     64x24x2.7mm
Display Type:     FSTN, Matrix Display (131*64)
Contrast:     User Selectable System Logic
Entry-system logic:    Algebraic, Scientific and Textbook Built-in Fuctions
Built-in functions:  Graphing, Mathematical, CAS, Scientific, Statistical, Programming
Operating Menus, prompts, etc.:  Contextual Menus, Choose Boxes, List and Dialogue Boxes
Internal precision:    15 Digits, Infinite in CAS Memory
Memory registers:    9 Independent Memory
Keyboard:     Rotating Click Power
Power off Memory protection:   n/a
Battery life:     65 days (based on 1 hr use per day)
Auto power off:     Yes
Physical Charateristics Weight:   120 g Size (L × W × D): 157x75s12cm
Enclosure Material:    Plastic Key
Top Material:     Plastic