德州仪器TI-89 德州仪器TI89图形计算器

TI-89Titanium是Texas Instruments所推出的图像计算器，它曾被称为「地球上功能最強大的计算器」( The Most Powerful Calculators on the Planet )，由此可知它的功能是如何备受推崇了 。TI-89Titanium拥有2.9MB庞大记忆体，其中188KB是计算记忆，可供用家直接使用，另外 2.7MB是Flash Memory。它拥有強大的计算功能，包括矩阵、解方程及微分方程( Differential Equations )、极限( Limits )、泰勒展开式( Taylor's Expansion )、微积分Calculus等，以及程式及图像功能。而且这些功能有很多是其他图像计算器沒有的，例如矩阵计算包括Eigenvalue、Eigenvector、LU Decomposition这些其他计算器沒有的功能。它更拥有符号代数( Symbolic Algebra )功能及Flash Memory功能，这項強劲功能可容许TI-89透过TI Graph Link连接线接受一些由网上下载的程式并变为TI-89的內置功能，在现今的计算器中可算是数一数二。

TI-89Titanium图形计算器－－－TI-89图形计算器
16个预置应用程序；

3 倍于 TI-89 的内存容量；内置 USB 连线，方便计算器与电脑之间的数据传输。TI-89的升级产品

TI在还提供一堆的Application可供各种数理、工程、教学应用
(http://education.ti.com/educationportal/sites/US/productDetail/us_ti89ti.html?bid=3)

功能描述：Bid Specifications

	Electronically upgradeable graphing calculator gives you the most up-to-date functionality and software applications (Apps)
	About 188K bytes of user-available RAM
	About 2.7 MB of user-available Flash ROM for data archive and Apps (3x the Flash ROM memory of the TI-89)
	100x160 pixel display
	Internal clock with date and time display
	Icon desktop that allows easier access to Apps and editors
	USB port for computer connectivity, unit-to-unit communication with TI-89 Titanium graphing calculators via Presentation Link adapter
	I/O port for communication with other TI products
	USB unit-to-unit link cable included
	TI Connectivity Cable included
	TI Connectivity Cable and TI Connect software allow information to be transferred to and from a computer and printed or stored on disk
	Included Apps: CellSheet, EE*Pro? Finance, French Localization, German Localization, NoteFolio, Organizer, Polynomial Root Finder, Simultaneous Equation Solver, Spanish Localization, Statistics with List Editor (English, French, German and Spanish versions), StudyCards, Symbolic Math Guide
	Apps are available from TI and other leading developers.
	Advanced Mathematics Software functionality is suitable for college mathematics and engineering coursework.
	Pretty Print shows equations and results with radical notation, stacked fractions, and super* exponents.
	Active Calculator Home history screen can hold up to 99 previous entries for deep recall.
	Real and complex numeric results
	Symbolic manipulation for algebra, calculus and differential equations
	Over 100 symbolic units in 28 categories for use in equations, computations, and unit conversions
	20 stored constants with symbolic units for scientific calculations
	Graphs functions, parametric and polar equations, recursively-defined sequences, 3-dimensional surfaces, and differential equations
	Up to 99 graphing equations defined and saved for each graphing mode
	Numeric evaluation of functions in tables and data variable format
	Interactive analysis of function values, roots, maximums, minimums, integrals, derivatives, intersections, inflection points, and arc lengths
	Recursively-defined sequences access any number of previous terms
	Slope and direction fields for exploring differential equations
	RK and Euler numeric differential equation solving methods
	Real time rotation of 3-D surfaces
	List-based one- and two-variable statistical analysis, including ten regression models
	Statistics plots including scatter, xy-line, box and modified box plots. Histograms and regression lines are available.
	Matrix operations including inverse, determinant, transpose, augment, elementary row operations, and reduced row echelon form. Matrix elements can be real or complex and numeric or symbolic
	Advanced matrix operations including eigenvalues, eigenvectors, LU and QR decompositions
	Column-logic expressions in data/matrix editor are retained for automatic recalculation when values change
	Interactive numeric equation solver
	Hexadecimal and binary operations and conversions
	Extensive programming capability with number and size of programs limited only by available memory.
	User-definable functions extend built-in functionality
	Optional assembly language programming
	Alphabetical CATALOG to access and show "help" information for each function and command
	Memory management to create folders for specific applications or subjects
	255 symbols in the character set including Greek, system, and international characters.
	Compatible with Calculator-Based Laboratory (CBL2) and Calculator-Based Ranger (CBR) Systems to allow collection and analysis of real-world data
	Link with another TI-89 Titanium, TI-89, Voyage 200, TI-92 Plus or TI-92
	Compatible with the TI-Navigator Classroom Learning System
	TI ViewScreen unit available that is compatible with the same TI ViewScreen LCD panel as the TI-89/TI-92 Plus/Voyage 200 and the TI-Presenter
	All TI-89 Titanium student models can plug into the TI-ViewScreen LCD panel andTI-Presenter video interface via a TI-89 Presentation Link adapter.
	Kickstand Slide Case available to prop up your calculator to view display and keys better
	TI Keyboard-compatible
	Powered by 4 AAA batteries with a Silver Oxide battery backup to protect RAM memory during main battery change
	Impact-resistant slide case
	One-year limited warranty
	Toll-free help hot-line: 1 800 TI-CARES
	E-mail help line atti_cares@ti.com
	Supplemental activity books available.
	Workshop Loan Program (WoLoP) - borrow TI calculators for evaluation of workshops
	Volume Purchase Program: proofs of purchase redeemable for additional products
	TI calculator poster and keyboard transparency available
	TI Product CD included with full reference Guidebook and free software Applications
	Guidebook included, full Reference Guidebook available on Product CD   你好请问84银版和89钛区别在哪里？我是工科学生，不知哪款更适合些，谢谢！ 89T 里面有俩个适合工科学生软件，专业性比较强，有机械工程和电子工程两个软件。大学工科学生呢比较适合