Older adding machine. Action like car odometer.
See adding machine (disambiguation) for other uses of this term.

An adding machine is a type of calculator, usually specialized for bookkeeping calculations. In the United States, very old adding machines were usually built to read in dollars and cents.

It was invented by the French mathematician Blaise Pascal in 1642.

## Operation

They required the user to pull a crank to add numbers. The numbers were input by pressing keys on a large keypad: for instance, the amount \$30.72 was input using keys corresponding to "\$30", "70Â¢", and "2Â¢", and then pulling the crank. Subtraction was impossible, except by adding the complement of a number (for instance, subtract \$2.50 by adding \$9,997.50).

A later adding machine, called the comptometer, did not require that a crank be pulled to add. Numbers were input simply by pressing keys. The machine was thus driven by finger power.

Some adding machines were electromechanical -- an old-style mechanism, but driven by electric power.

Some "ten-key" machines had input of numbers as on a modern calculator -- 30.72 was input as "3", "0", "7", "2". These machines could subtract as well as add. Some could multiply and divide, although including these operations made the machine more complex.

Modern adding machines are like simple calculators. They often have a different input system, though.

 To figure out this: Type this on the adding machine: 2+17+5=? 2 + 17 + 5 + T 19-7=? 19 + 7 - T 38-24+10=? 38 + 24 - 10 + T 7Ã—6=? 7 Ã— 6 = 18/3=? 18 Ã· 3 = (1.99Ã—3)+(.79Ã—8)+(4.29Ã—6)=? 1.99 Ã— 3 = + .79 Ã— 8 = + 4.29 Ã— 6 = + T
Note: Sometimes the adding machine will have a key labeled * instead of T. In this case, substitute * for T in the examples above. Alternatively, the plus key may continuously total instead of either a * or T key. Sometimes, the plus key is even labeled thus: +/=

## Burroughs's calculating machine

Patent drawing for Burroughs's calculating machine, 1888.
William Seward Burroughs received a patent for his adding machine on August 21, 1888. He was a founder of American Arithmometer Company, which became Burroughs Corporation and evolved to produce electronic billing machines and mainframes, and eventually merged with Sperry to form Unisys. The grandson of the inventor of the adding machine is Beat author William S. Burroughs (best known for Naked Lunch.)

## References

• Adding machine - a form of calculator
• The Adding Machine - a play by Elmer Rice
• - a collection of writings by William S. Burroughs

A calculator is a hand-held device for performing calculations. Although modern calculators often incorporate a general purpose computer, the device is designed for performing specific operations, rather than for flexibility.
Bookkeeping (book-keeping or book keeping) is the recording of all financial transactions undertaken by an individual or organization. The organization may be a business, a charitable organization or even a local sports club.
Motto
"In God We Trust"   (since 1956)
"E Pluribus Unum"   ("From Many, One"; Latin, traditional)
Anthem
Motto
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"

Blaise Pascal (pronounced [blɛːz paskal]), (June 19 1623 – August 19 1662) was a French mathematician, physicist, and religious philosopher. He was a child prodigy who was educated by his father.
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In mathematics and computing, the method of complements is a technique used to subtract one number from another using only addition of positive numbers. This method was commonly used in mechanical calculators and is still used in modern computers.
A Comptometer is a type of mechanical (or electro-mechanical) adding machine. The comptometer was the first adding device to be driven solely by the action of pressing keys, which are arranged in an array of vertical and horizontal columns.
In engineering, electromechanics combines the sciences of electromagnetism of electrical engineering and mechanics. Mechatronics is the discipline of engineering that combines mechanics, electronics and information technology (software engineering).
A calculator is a hand-held device for performing calculations. Although modern calculators often incorporate a general purpose computer, the device is designed for performing specific operations, rather than for flexibility.
William Seward Burroughs I (January 281855 - September 141898) was an American inventor, born in Rochester, New York.

Initially a bank clerk, he invented a "calculating machine" designed to calculate the area of fur skins.
August 21 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

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• 1192 - Minamoto Yoritomo becomes Seii Tai Shōgun and the de facto

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The Burroughs Corporation began in 1886 as the American Arithmometer Company in St. Louis, Missouri selling an adding machine invented by William Seward Burroughs.
Sperry Corporation (1910-1986) was a major American equipment and electronics company whose existence spanned more than seven decades of the twentieth century.

## Early history

The company was founded in 1910 as the Sperry Gyroscope Company
Unisys Corporation

Public (NYSE: UIS )
Founded 1886 as American Arithmometer Company
1986 as Unisys
Headquarters Blue Bell, Pennsylvania, United States

Key people Joseph W.
William S. Burroughs
Pseudonym: William Lee
Born: 5 February 1914
St. Louis, Missouri
Died: 2 August 1997 (aged 83)
Lawrence, Kansas
Occupation: novelist, essayist
Genres: Beat, science fiction, satire
Literary movement: Beat
Postmodern