Mathematical tools
various calculators
LendingOK - currency converter
GraphCalc – an Open Source graphing calculator program
GraphCalc The Ultimate Windows 2D/3D Graphing Calculator Software
Vintage Calculators
Vintage Calculators Web Museum
Soviet Calculators Collection
Soviet Calculators Collection. By Sergei Frolov
Museum of Soviet Calculators moscow soviet
Museum of Soviet Calculators
Calculator Museum calculators
Museum of Pocket Calculating Devices
The Old Calculator Web Museum
The Old Calculators Web Museum
JavaScript Scientific Calculator – Scientific notation, hex, octal, decimal, binary, and math functions; requires JavaScript (from ostermiller.org)
Scientific Calculator
Online deep space SETI range calculator
SETI range calculator - using dish size, power, bandwidth, frequency
Online Calculator Software web calculator
Online Calculator Software - i-Calculator
Online Calculators and Converters
HIOX INDIA Scientific, Basic online simple calculator / calculater.
A Traditional Suan Pan Technique showing Long Division
Long Division on a Chinese Abacus - Chinese Suan Pan
A Traditional Suan Pan Technique for Multiplication
Traditional Multiplication Techniques for Chinese Abacus - Chinese Suan Pan
Chinese Abacus Tutor - See the steps in addition and subtraction
Chinese Abacus
froola rocks. froola
Interactive demonstration of Chisenbop chis chis
Chisenbop tutorial
another example wood page
Veritas® Beam Compass - Lee Valley Tools
beam or trammel compass (variant form);
Microscopic Beam Compass
Windows calculator that supports complex numbers
Scientific calculator. Windows XP compatible
http://www.math.sfu.ca/histmath/China/Beginning/Rod.html math china beginning rod
Rod Numerals (Counting Rods)
Meccano Difference Engine meccano
Robinson's Difference Engine #1
The London Science Museum exhibition on the Difference Engine line babbage
Science Museum | Babbage | Introduction
Chinese Short Division Techniques on a Suan Pan
Short Division on a Chinese Abacus - Chinese Suan Pan
Print Free Graph Paper
Javascript simulation of Location arithmetic courses napier chessboard
Napier's Chessboard Calculator
Mathematical Table Generator -- generates addition, subtraction, multiplication, division, exponentiation, and trigonometric tables using JavaScript.
Mathematical Table Generator
Modern Chinese Multiplication Techniques on an Abacus
Modern Multiplication Techniques for Chinese Abacus - Chinese Suan Pan
Large PDF scan of ''Rabdologiæ'' archive
Java implementation of Napier bones in various number systems at cut-the-knot
Napier Bones in Various Bases
A more thorough discussion of the Pascaline's operation macs calculators pascal
Pascal's Adder - About Pascaline
How it works lecture
History of Computing Science: The First Mechanical Calculator
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Calculator , Chinese abacus , Chisenbop , Compass (drafting) , Complex number , Counting rods , Difference engine , Division (mathematics) , Graph paper , Location arithmetic , Mathematical table , Multiplication , Napier's bones , Pascal's calculator , .
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