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  1. A Brief History of Mechanical Calculators - James Redin
    An essay on the historical evolution of calculating machines, from the abacus to Babbage's differential machine to today's computers. Contents include: the abacus; the Antikythera calculator; Napier's Bones; Leonardo da Vinci's design; Schickardís machine; the Pascaline; Leibniz' Stepped Drum; Calculating devices during the 18th Century; Thomas' Arithmometer; the Difference Engine; Thomas Fowler's Ternary Calculator; The Baldwin Principle and the Odhner Machines; The Partial Product Multiplying Approach; Troncets or Slide Adders - No Batteries Required; The quest for a keyboard; The "Macaroni Box" and Dorr Felt's Comptometer; William Seward Burroughs; The beginnings of the 10-key machine; Christel Hamann; The Victor Adding Machine Co.; Marchant Calculators; The Walther Company, Friden; The Curta, a Mechanical Wonder; Electromechanical Calculators. more>>

  2. Calculators On-Line Center - Martindale's Reference Desk
    Online software and Java applets that calculate quantities for a number of general and specific uses. Numerous "calculators" available for Code Translators, Distance/How Far is it?, Finance, Taxes, Grade Point Average, Logic & Syllogism, Navigation/GPS, Spreadsheets & Worksheets; Business, Investment, Sunrise, Sunset & Tide, Weather. More traditional calculators are available for Unit Conversion, Industrial Processes, Mathematics, Radiation and EHS Safety, and Science & Engineering. more>>

  3. Calculators On-Line Center: Part II - Mathematics - Martindale's Reference Desk
    Over 7,420 calculators for: Unit Conversion (Time, Distance, Length, Speed, Weight, etc.); Abacus; Basic Math; Complex Mathematics; Complex Math Education; Complex Math Calculators by Specialty: Algebra and Linear Algebra; Algorithms; Calculus; Central Limit; Combinatorial; Complex Numbers; Continued Fractions; Curves; Curve Fitting; Differential Equations; Fractals and Chaos; Geometry; Goldbach's Conjecture; Graphs; Hexagonal; Histograms; Hypercube and N-Dimensional; Integrals; Inverse; Knot Theory; L-System; Level Set Methods; Lie Groups; Linear Equations; Linear Regression; Linear Transformation; Math Animations; Number Theory; Pascal Method; Postfix; Prime Numbers; Pythagorean; Quadric Surfaces; Roots; RPN; Topology; Trigonometry; Vectors; Wavelets. Slide Rule; Over 130 Statistical Calculators. more>>

  4. Casio Education - Casio America, Inc.
    Calculators, technology, lesson library, activities and sample questions, and other calculator resources for grades K through college. See also Casio's news and events, testimonials, and customer more>>

  5. Desmos - Desmos Inc
    This free online graphing calculator zooms in and out of plots, offers slider bars to explore parameters, switches between Cartesian and polar coordinates, and more. Save sketches, mark points of interest, turn on "projector mode" for thicker, darker lines -- and share your graph to the community gallery. more>>

  6. education.ti.com - Texas Instruments, Inc.
    Texas Instruments calculator resources and educational solutions: product information; free program downloads; classroom activities, including both a test prep section and a free, collaborative forum for sharing favorite activities that use TI technology, the Activity Exchange; discussion groups; news items; and calculator history. more>>

  7. Graphics Calculator Information (Mathematics Archives) - University of Tennessee, Knoxville (UTK)
    Links to calculator projects, programs, and utilities; lab activities and calculator worksheets; calculator FAQs; and other calculator sites. more>>

  8. iFigure
    Links to online calculators and worksheets that provide information to help in planning, solving and making decisions for problems and tasks such as buying a home, investing money, figuring business profits, making statistical comparisons, or calculating pump pressure. A searchable, annotated Mathematics and Statistics area offers calculators for Algebra, Calculus, Geometry, Statistics (descriptive, estimation, multivariate, probability, regression, testing, tutorials), Trigonometry, and Tutorials and Resources. more>>

  9. Power Conversion - MedCalc.com
    Convert to and from watts, btus, cals, ergs, ft-lbs, horsepower, kilowatt. more>>

  10. Selected Internet Calculator Resources - Math Forum
    Selected Internet resources for integrating calculators into the math classroom, one of the Math Forum's series of pages dealing with issues in math education. curricular resources (articles, courses, textbooks); graphing calculator resources; online lessons and problems; other sites of interest; and WWW calculators. more>>

  All Sites - 406 items found, showing 1 to 50

  1. 2Learn.org - Linda Blumenthal, Thinkwell Corp.
    Offering a variety of products including a comprehensive learning plan, created online. Many free resources for teachers, parents, and students, as well. Math games and tools. ...more>>

  2. 3DCalculator - Andre Bullitt Software
    Download a demo (Windows 95), see a short video, or purchase for U.S. $10.00 online. ...more>>

  3. The ABACUS International Math Challenge - Tivadar Divéki, Grace Church School
    The ABACUS International Math Challenge is open to students in three categories (grades 3-4/ages 9-10; 5-6/ages 11-12; 7-8/ages 13-14), with 8 problems posed each month. The challenge begins in September and ends in April. It originated with the ABACUS ...more>>

  4. The Abacus - Jim Loy
    Illustrations of the modern Japanese abacus (Soroban) and the Chinese abacus, both showing the number 1998, how to add "one" to a number, and how to carry. ...more>>

  5. The Abacus: The Art of Calculating with Beads - Luis Fernandes
    A tutorial on using the abacus - a calculator whose earliest known use is circa 500 B.C. by the Chinese civilization. Addition, subtraction, division and multiplication can be performed on a standard abacus. Beginning in about 1600 A.D., use and evolution ...more>>

  6. ACTM '97: Second Asian Technology Conference in Mathematics - S. Chu, Radford University
    Computer Technology in Mathematical Research and Teaching. ATCM97 provided an interdisciplinary forum where researchers and teachers in the fields of mathematics, education, computers, and technology presented results and exchanged ideas and information. ...more>>

  7. ADIFF: Automatic Differentiation Utility - Juan Sanchez
    Symbolic derivatives calculator, performs symbolic differentiation of common functions. Allows specification of arbitrary functions and their derivatives for evaluation. ...more>>

  8. Advanced Algebra Through Data Exploration: A Graphing Calculator Approach - Key Curriculum Press
    An all-new text that combines data exploration, hands-on activities, and the power of graphing calculators to enhance the content of advanced algebra. ...more>>

  9. Advanced Grapher - Serpik Soft
    Graphing, curve fitting and calculating software. Graphs Cartesian (Y(x) and X(y)), polar and parametric functions, graphs of tables, equations (implicit functions), inequalities and systems of inequalities and slope fields, with up to 30 graphs in one ...more>>

  10. Aepryus Software
    Aepryus is a developer of math, physics, and evolutionary biology software for Microsoft Windows computers. Download, purchase, or obtain information about programs such as Aepryus Graph, a function plotting application capable of 2D and 3D shaded plots ...more>>

  11. AJ Design Software - Jimmy Raymond
    Provides various math, science, and engineering calculators. Calculators include geometric shapes, constant acceleration motion, ideal gas law, pipe flow, Reynolds number, venturi meter, and quadratic equation. ...more>>

  12. Algebra1: Graphing Linear Equations - Tim O'Brien
    A Master's Degree project designed to provide an understanding of the graphing of linear equations at the Algebra 1 level. Use Java applets to learn about ordered pairs, graphing equations, horizontal lines, vertical lines, slope, equations and slope, ...more>>

  13. Algebra.Help - John Traker
    Algebra.help is an online resource designed to help people learn algebra. It offers lessons to teach or refresh old skills, calculators that show how to solve problems step-by-step, and interactive worksheets for testing skills. To be notified of updates ...more>>

  14. Algebra matricial - Cristina Díaz Sordo y Luis Vaamonde Portas
    Disfruta del álgebra usando la calculadora matricial y los generadores de prácticas, ejemplos, ejercicios y tests de autoevaluación diseñados en Javascript. ...more>>

  15. allmath.com - Arbor Media, Inc.
    Math tools (flash cards, a metric converter); games (magic square), and reference pages: biographies, a glossary, the multiplication table, metric conversion factors, and an ask an expert service. ...more>>

  16. The Amazing Abacus - ThinkQuest 1996
    An exploration of the abacus. Learn to use the abacus and what it is for, and to speak and write Chinese numerals and formulas. ...more>>

  17. AMOF: The Amazing Mathematical Object Factory - Frank Ruskey
    Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is a combinatorial object. AMOF is part encyclopedia and part calculator, a teaching tool that generates ...more>>

  18. Amortization Calculator - myAmortizationChart.com
    Online amortization calculator, with definition, schedules, and links to other financial calculators. ...more>>

  19. Amortization Calculator - Quoteserv
    A mortgage calculator for calculating the total cost of a loan, including monthly payments and amortization. Complete breakdown of payments month by month, with great detail. ...more>>

  20. Amortization Schedule
    JavaScript calculators for figuring out loan amortizations, investment fees, debt payoffs, savings, timesheets, and tips; for simulating investments; and for comparing savings rates and mortgages. ...more>>

  21. Andy Norton's Web Page - Dept. of Mathematics Education, Univ. of Georgia
    Illustrated essays and explorations of algebra and geometry using various technology, including TI-85 calculators, CBL's and computer software such as Geometer's Sketchpad (with sketches to download), Algebra Expressor, and Excel, by a grad student in ...more>>

  22. AP Calculus TI 89 Program - Nils Hahnfeld
    Calculator program for the TI 89 which animates calculus concepts and computes answers. Covers the entire AP Calculus (AB & BC) curriculum. Screen shots and a list of functions available at the site, as well as documentation. ...more>>

  23. AP Statistics - BB&N Upper School
    A course from the Buckingham Browne & Nichols School. Advanced Placement Statistics acquaints students with the major concepts and tools for collecting, analyzing, and drawing conclusions from data, featuring work on projects involving the hands-on ...more>>

  24. ArithmAttack - David Baurac, Argonne National Laboratory
    How many computer-generated arithmetic problems can you answer in 60 seconds? Choose an operation (add, subtract, multiply, divide, random operator) and high and low numbers (0-12). Enter an answer and check it; after 60 seconds the program will tell ...more>>

  25. Asknumbers.com
    Online conversions between different measures of length, weight, temperature, pressure, energy, frequency and more. ...more>>

  26. Astronomy Calculator - R.T. Back
    The Astronomy Calculator provides general information about the phases of the moon and planets, and annual meteor showers. You supply the date, time of observation, and the number of hours east and west from directly overhead. ...more>>

  27. Austrian Center for Didactics of Computer Algebra (ACDCA)
    Download teaching examples, materials, and exams that use Computer Algebra Systems (CAS) -- in particular, the TI-92 calculator. With bugs, tips and cheats in handling the TI-89, TI-92, and Texas Instruments Voyage200. Also, get news about the Center ...more>>

  28. AutoAbacus - Nathan Funk, Singular Systems
    An equations-solving application and calculator. Any number of simultaneous equations can be solved instantly. Uses for the program range from checking results on homework assignments to setting up mathematical models of a real-life problems. A demo is ...more>>

  29. The Aztec Calendar - René Voorburg
    Historical information and illustrations of the two more or less independent systems comprising the Aztec calendar, one having 365 days and based on the agricultural or solar year, the other with 260 days. A Calculator allows you to enter a date in the ...more>>

  30. Basic TI-82 Tutorial - University of Illinois at Urbana-Champaign
    An online interactive tutorial that starts from scratch with turning on the TI-82 calculator and takes you through the basic steps needed to do arithmetic and function evaluation and to enter, graph, and tabulate functions. You use a TI-82 as you view ...more>>

  31. Basic TI-92 Tutorial - University of Illinois at Urbana-Champaign
    An online interactive tutorial updated for the new TI-92 layouts and commands. It begins with turning on the TI-92 calculator and proceeds through the basic steps needed to do arithmetic and finally to entering, graphing and and tabulating functions. ...more>>

  32. Best Graphing Calculators - Dan Agostinelli
    Reviews of TI's current graphing calculator models. The guide "TI Graphing Calculators in Exams" provides a tabular overview of the calculators allowed at the SAT, ACT, Advanced Placement (AP), PSAT/NMSQT, International Baccalaureate (IB), and Praxis ...more>>

  33. Biopolymer Calculator - Schepartz Lab
    Calculate the molecular weight, the extinction coefficient, the concentration, and the melting temperature of a single stranded nucleic acid. Additionally, you can enter a protein sequence and calculate the molecular weight (using average isotopic mass), ...more>>

  34. A Broken Calculator - Cut the Knot!, Alexander Bogomolny
    Thoughts on the controversial question of using calculators in the classroom, and the author's belief that even a broken calculator may have its uses: the elementary mathematics curriculum may emphasize any or all of the paper-and-pencil, mental, or technology-based ...more>>

  35. BTU Calculator - HearthNet
    A calculator that estimates the heating needs of a room, a combination of rooms, or an entire home. Enter the length and width of the area to be heated and select the climate and insulation factors from the pop-up boxes. A Java version of this calculator ...more>>

  36. Cabri Jr. - Texas Instruments Incorporated
    Interactive geometry for the calculator: construct, analyze, and transform mathematical models and geometric diagrams. Cabri Jr. imports and exports figures from Windows computers. Take a tutorial, preview and download weekly activities, or browse the ...more>>

  37. Calc 360 - Numerant, LLC
    Calc 360 is a free, simple, and powerful calculator for your PC. Some of its main features include: adjustable precision, calculation history window, custom variables, loading and saving of calculations and more... ...more>>

  38. Calc 3D
    Calculators for Windows 95/98/NT/XP designed to handle vectors, matrices, complex numbers, quaternions and coordinates. For point, line, plane, sphere, circle Calc 3D calculates distances, intersections, and some additional information like volume and ...more>>

  39. Calc3D - Andreas Greuer
    Calc 3D is a free program for calculating 3-dimensional vectors, matrices and complex numbers with Windows 95/98/NT. Cartesian coordinates, spherical coordinates und cylindrical coordinates can be transformed into each other. Distances, intersections, ...more>>

  40. Calchemy Live! - Calchemy Software Inc.
    Express the parameters of an equation in any convenient units of measure. Calchemy then checks the equation and parameters for dimensional consistency and makes all the necessary units conversions automatically. Categories include acceleration, angle, ...more>>

  41. Calcugator - Moscazul Software Llc
    Licensed software that "... works like a calculator, a plotting engine, and a programming environment." Calcugator creates bar, pie, pareto and xy charts; 2D plots of functions as well as polar and parametric displays; and 3D plots of functions, contour ...more>>

  42. CalculateWhat - Colin Fagras
    Free online calculators. In addition to covering math topics such as algebra, geometry, and statistics, CalculateWhat crunches numbers on topics financial, scientific, and -- under a category called "miscellaneous" -- more whimsical and topical in nature. ...more>>

  43. Calculations and Formulas for Gemstones - Dendritics Incorporated
    Calculate the carat weight or specific gravity of a gemstone or the value of precious metals in various currencies, or convert weights among grams, carats, pennyweights, and ounces. ...more>>

  44. A Calculator
    JavaScript calculators: the four basic operations, average, arithmetic congruence, greatest common divisor (GCD), least common multiple (LCM), radical simplifier, word converter that writes out numerals, and more. ...more>>

  45. Calculator Based Algebra (CBA) - Allen V. Robnett
    A complete basic algebra course, including a review of arithmetic operations, in 93 TI-83 programs. Programs and operating notes can be downloaded here at no charge. The course emphasizes motivation and mastery. ...more>>

  46. Calculator City - 1728 Software Systems
    Online calculators for solving equations in 2, 3, or 4 unknowns, the Pythagorean theorem, sphere and cylinder area and volume, vector addition, resistors in parallel, chemistry gas laws, compound interest, and loan payments. Games and puzzles include ...more>>

  47. calculator.com - Athera Corporation
    Free access to online calculators to help you solve problems and answer questions in the home, office, and school. There are calculators for finance, business, and science, cooking, hobbies, and health. Some solve problems, some satisfy curiosity, and ...more>>

  48. The Calculator Controlled Robot Kit - Norland Research
    Makers of a kit that turns a Texas Instruments (TI) graphing calculator into a robot. Requiring no extra software — just TI's native BASIC programming language — the Calculator Controlled Robot Kit lets TI-73 Explorers, TI-82s, TI-83s, TI-84s, ...more>>

  49. Calculator Directory - ArsRef LLC
    Commercial calculating software arranged by category. One page of free online calculators. ...more>>

  50. A Calculator - Eric Fuller
    This JavaScript calculator supports the four basic arithmetic operations, and features simple memory, square root, and percent functions. ...more>>

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