A calculator is a device for performing numerical calculations. The type is considered distinct from both a calculating machine and a computer in that the calculator is a special-purpose device that may not qualify as a Turing machine. Although modern calculators often incorporate a general purpose computer, the device as a whole is designed for ease of use to perform specific operations, rather than for flexibility. Also, modern calculators are far m ...

Including:

• Calculator - Overview
• Calculator - Electronic calculators
• Calculator - Personal computing
• Calculator - History
• Calculator - Origin: The Abacus
• Calculator - The 17th century
• Calculator - 1930s to 1960s
• Calculator - 1970s to mid-1980s
• Calculator - Mid-1980s to present
• Calculator - Drawbacks
• Calculator - Trivia
• Calculator - Patents

Read more here: » Calculator: Encyclopedia - Calculator

Read more here: » Calculation: Encyclopedia - Calculation

Today most calculators are handheld microelectronic devices, but in the past some calculators were as large as today's computers. The first mechanical calculators were mechanical desktop devices, which were soon replaced by electromechanical desktop calculators, and then by electronic devices using first thermionic valves, then transistors, then hard-wired integrated circuit logic. A pocket calculator is a small battery-powered or solar powered electronic digital computer made possible by integrated circuit and semiconductor technolog ...

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Calculator, Calculator - Overview, Calculator - Electronic calculators, Calculator - Personal computing, Calculator - History, Calculator - Origin: The Abacus, Calculator - The 17th century, Calculator - 1930s to 1960s, Calculator - 1970s to mid-1980s, Calculator - Mid-1980s to present, Calculator - Drawbacks, Calculator - Trivia, Calculator - Patents

Read more here: » Calculator: Encyclopedia II - Calculator - Electronic calculators

Calculator - Origin: The Abacus. The first calculators were abacuses, and were often constructed as a wooden frame with beads sliding on wires. Abacuses were in use centuries before the adoption of the written Arabic numerals system and are still widely used by merchants and clerks in China and elsewhere. Calculator - The 17th century. Wilhelm Schickard built the first automatic calculator called the "Calculating Clock" in 1623. Some 20 years later, in 1645, French philosopher ...

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Calculator, Calculator - Overview, Calculator - Electronic calculators, Calculator - Personal computing, Calculator - History, Calculator - Origin: The Abacus, Calculator - The 17th century, Calculator - 1930s to 1960s, Calculator - 1970s to mid-1980s, Calculator - Mid-1980s to present, Calculator - Drawbacks, Calculator - Trivia, Calculator - Patents

Read more here: » Calculator: Encyclopedia II - Calculator - History

Calculator - Origin: The Abacus. Main articles: Abacus, and [[]], and [[]], and [[]]See also:

Calculator, Calculator - Overview, Calculator - Electronic calculators, Calculator - A basic calculator, Calculator - Advanced electronic calculators, Calculator - Use in education, Calculator - Other concerns on useage, Calculator - Calculators vs. computing, Calculator - History, Calculator - Origin: The Abacus, Calculator - The 17th century, Calculator - 1930s to 1960s, Calculator - 1970s to mid-1980s, Calculator - Mid-1980s to present, Calculator - Trivia, Calculator - Patents

Read more here: » Calculator: Encyclopedia II - Calculator - History

Calculator - Origin: The Abacus. Main article: Abacus The first calculators were abacuses, and were often constructed as a wooden frame with beads sliding on wires. Abacuses were in use centuries before the adoption of the written Arabic numerals system and are still widely used by merchants and clerks in China and elsewhere.

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Calculator, Calculator - Overview, Calculator - Electronic calculators, Calculator - A basic calculator, Calculator - Advanced electronic calculators, Calculator - Use in education, Calculator - Other concerns on useage, Calculator - Calculators vs. computing, Calculator - History, Calculator - Origin: The Abacus, Calculator - The 17th century, Calculator - 1930s to 1960s, Calculator - 1970s to mid-1980s, Calculator - Mid-1980s to present, Calculator - Trivia, Calculator - Patents

Read more here: » Calculator: Encyclopedia II - Calculator - History

A calculating machine is a machine designed to come up with calculations (i.e. computations); the most famous is probably the Victorian British scientist Charles Babbage's Difference Engine (No. 2), designed in the 1840s but never completed in the inventor's lifetime*. Calculating machines shouldn't be confused with adding machines, which are for solving sums. (* A working Difference Engine based on Babbage's original specifications, using only materials available during the mid-19th century, ...

Including:

• Calculating machine - Patents

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Calculation is a solitaire card game. It offers more scope for skill than many similar games; it is sometimes said that a skilled player can win Calculation three times out of five. At the start of play, one ace, deuce, three, and four of any suit are removed from a standard deck of cards and laid out as the foundations. The ace foundation is to be built up in sequence until the king is reached, disregarding suit. The other foundations are similarly built up, but by twos, threes, and fours, respecti ...

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This is a list of types of calculators, many of which are obsolete but hoarded by legions of admiring collectors. Many of these old devices belong in a museum [1] [2] List of calculators - Canon. X-07 abacus, slide rule, pocket computer List of calculators - Casio. FX-50F FX-82 FX-100D FX-260 Solar FX-350 FX-702P FX-850P FX-880P FX-911Z FX-6 ...

Including:

• List of calculators - Canon
• List of calculators - Casio
• List of calculators - Hewlett-Packard
• List of calculators - Sharp Corporation
• List of calculators - Sinclair Research
• List of calculators - Texas Instruments
• List of calculators - SR series
• List of calculators - Graphing
• List of calculators - Elektronika
• List of calculators - Elka
• List of calculators - Emulators

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Calculator spelling is a technique of spelling words using a calculator equipped with seven-segment displays of different technologies, including but not limited to LCD, VFD, LED, Panaplex, etc. Spelling with Nixie tubes won't produce good readability of the upside-down characters, while spelling with dot-matrix displays, as well as with fourteen-segment and sixteen-segment displays is so o ...

Including:

• Calculator spelling - Description
• Calculator spelling - Using four-function calculators for spelling
• Calculator spelling - Using scientific calculators for spelling

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The Curta was a small, hand-cranked mechanical calculator introduced in 1948. It had a brilliantly compact design, a small cylinder that fit in the palm of the hand. It could be used to perform addition, subtraction, multiplication, division, and with more difficulty square roots and other operations. The Curta's design is a variant of Gottfried Leibnitz's Arithmometer, accumulating values on cog ...

Including:

• Curta calculator - Use in car rallies

Read more here: » Curta calculator: Encyclopedia - Curta calculator

This article details various mathematical algorithms to calculate the day of the week for any particular date in the past or future. There are a number of other algorithms to do this, including, for example, the Doomsday Algorithm, but they are all variants of each other, simply using different rules to achieve the same result. A typical application is to calculate the day of the week on which someone was born or some other special event occurred. Calculating the day of the week - Introduction. The b ...

Including:

• Calculating the day of the week - Introduction
• Calculating the day of the week - Useful concepts
• Calculating the day of the week - Corresponding months
• Calculating the day of the week - Corresponding years
• Calculating the day of the week - The algorithm to calculate the day of the week
• Calculating the day of the week - Examples
• Calculating the day of the week - Centuries Table
• Calculating the day of the week - Months Table
• Calculating the day of the week - Days Table
• Calculating the day of the week - Another algorithm to calculate the day of the week
• Calculating the day of the week - Calculating in your head

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HP Calculators are well-known for their use of Reverse Polish notation. Programmable HP calculators allow users to create their own programs as well as share them over the internet. ...

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HP calculators, HP calculators - History, HP calculators - Characteristics, HP calculators - Calculators

Read more here: » HP calculators: Encyclopedia II - HP calculators - Characteristics

In the 1960s, Hewlett-Packard was becoming a diversified electronics company with product lines in electronic test equipment, scientific instrumentation, and medical electronics, and was just beginning its entré into computers. The corporation recognized two opportunities: It might be possible to automate the instrumentation that HP was producing, and HP's customer base would likely buy a product that could replace the slide rules and adding machines that t ...

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HP calculators, HP calculators - History, HP calculators - Characteristics, HP calculators - Calculators

Read more here: » HP calculators: Encyclopedia II - HP calculators - History

Many websites offer free amortization calculators for their visitors, specifically ones who are considering taking out a mortgage. If you already know what your maximum payment amount is (usually based on your income, among other considerations), you can run the amortization calculation backwards to determine how much principal you can afford to borrow. Run this calculation using the same maximum monthly payment and different interest rates before meeting with a mortgage broke ...

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Amortization calculator, Amortization calculator - The Formula, Amortization calculator - Amortization Calculators and Mortgages, Amortization calculator - Other Uses

Read more here: » Amortization calculator: Encyclopedia II - Amortization calculator - Amortization Calculators and Mortgages

In Russia, Odhner's arithmometers were mass-manufactured first in 1886 by W.T. Odhner, Maschinenfabrik & Metallgiesserei and later in 1891 by the Odhner-Gill factory (фабрика Однера-Гиля) in St.Petersburg. Pinwheel calculators were more popular in Europe (particularly in Germany) than in the United States. In 1924, Felix Dzerzhinsky, the head of the Russian Cheka, initiated the manufacturing of arithmometers. Later they were named arithmometer Feliks and served in the Soviet Union well into the 1970s ...

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Pinwheel calculator, Pinwheel calculator - History, Pinwheel calculator - Operation

Read more here: » Pinwheel calculator: Encyclopedia II - Pinwheel calculator - History

Because of their large set of features and ease of use, graphing calculators are very commonly used in schools. Many vendors, especially Casio, market their graphing calculators primarily for educational use. Casio has focused its efforts at the high school/junior college user segment, most of their calculators offering relatively easy-to-use graphing features (some models incorporating a three-color display) without some of the most complex/flexible mathematical functions and programming languages found in the usually more expensive univers ...

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Graphing calculator, Graphing calculator - History, Graphing calculator - Graphing calculators in schools

Read more here: » Graphing calculator: Encyclopedia II - Graphing calculator - Graphing calculators in schools

Calculator spelling came into widespread use within schoolchild and student societies when cheap portable calculators became available. Humans are well known for their habits of finding ways of using things for purposes they were not originally designed for. That's why so many people try, for example, to run Linux on Xboxes, etc. Calculator spelling probably has similar origins. Seven-segment displays are well known for their ability of displaying of some (but not all) Latin letters. Displaying letters of other alphabets, e.g. ...

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Calculator spelling, Calculator spelling - Description, Calculator spelling - Using four-function calculators for spelling, Calculator spelling - Using scientific calculators for spelling

Read more here: » Calculator spelling: Encyclopedia II - Calculator spelling - Description

The calculation used to arrive at the periodic payment amount assumes that the first payment is not due on the first day of the loan, but rather one full payment period into the loan. While normally used to solve for A, it can be used to solve for any single variable in the equation provided that all other variables are known. The formula is: Where: A = periodic payment amount P = amount of principal (be sure to subtract any down-payments first!) i= periodic interest rate n= total number of payments (for a 30-year loan with monthly ...

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Amortization calculator, Amortization calculator - The Formula, Amortization calculator - Amortization Calculators and Mortgages, Amortization calculator - Other Uses

Read more here: » Amortization calculator: Encyclopedia II - Amortization calculator - The Formula

The character set of a generic four-function calculator, when it is turned upside down, is limited to the following Latin letters: O I Z E h S g L B 0 1 2 3 4 5 6 7 8 ...

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Calculator spelling, Calculator spelling - Description, Calculator spelling - Using four-function calculators for spelling, Calculator spelling - Using scientific calculators for spelling

Read more here: » Calculator spelling: Encyclopedia II - Calculator spelling - Using four-function calculators for spelling