A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically)...

An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics....

machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical...

The Curta is a hand-held mechanical calculator designed by Curt Herzstark. It is known for its extremely compact design: a small cylinder that fits in...

inspired by the Digi-Comp II. Slide calculator, around 1845 - Also known as Addiator, is a mechanical calculator capable of addition and subtraction using...

output forces and movement Mechanical calculator, a device used to perform the basic operations of arithmetic Mechanical energy, the sum of potential...

A slide rule is a hand-operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division...

made continuous-transmission calculators with unmatched speed, into the late 1960s, to the end of the mechanical calculator era. When speaking of a digital...

commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887. A key-driven calculator is extremely fast because...

A pinwheel calculator is a class of mechanical calculator described as early as 1685, and popular in the 19th and 20th century, calculating via wheels...

A slide calculator, also known as an Addiator after the best-known brand, is a mechanical calculator capable of addition and subtraction, once made by...

was the first digital mechanical calculator strong and reliable enough to be used daily in an office environment. This calculator could add and subtract...

The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673...

Japanese inventor. He is best known for his invention of Japan's first mechanical calculator. Ryōichi Yazu was born in Buzen, Fukuoka as the son of a village...

and 50 prototypes he invented a mechanical calculator. He built twenty of these machines (called Pascal's calculator or Pascaline) in the following ten...

conductors) had been producing a very successful range of key-driven mechanical calculators of the Comptometer type under the names "Plus" and "Sumlock", since...

constructed the first working mechanical calculator in 1623. In 1673, Gottfried Leibniz demonstrated a digital mechanical calculator, called the Stepped Reckoner...

functions in 1837. His Difference engine can be considered an advanced mechanical calculator and his Analytical Engine a forerunner of the modern computer, though...

a pinwheel calculator in 1685 and invented the Leibniz wheel, later used in the arithmometer, the first mass-produced mechanical calculator. In philosophy...

Inc.) was an American manufacturer of typewriters and mechanical, later electronic calculators. It was founded by Carl Friden in San Leandro, California...

Blaise Pascal had been called and celebrated as the inventor of the mechanical calculator in error during all this time. After careful examination it was...

An adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations. In the United States, the earliest adding machines...

invented the mechanical calculator in 1642. The introduction of his Pascaline in 1645 launched the development of mechanical calculators first in Europe...

(called Pascal's calculators and later Pascalines), establishing him as one of the first two inventors of the mechanical calculator. Like his contemporary...

Austrian engineer. During World War II, he designed plans for a mechanical pocket calculator (the Curta). Herzstark was born in Vienna, the son of Marie and...

Manchado, Cristina; Otero, Cesar (1 June 2022). "Torres Quevedo's mechanical calculator for second-degree equations with complex coefficients". Mechanism...

to Babbage's Difference Engine, which was a design for a simpler mechanical calculator. The analytical engine incorporated an arithmetic logic unit, control...

class of mechanical calculators. Invented by Leibniz in 1673, it was used for three centuries until the advent of the electronic calculator in the mid-1970s...

2307/595221. JSTOR 595221. "History of Computers and Computing, Mechanical calculators, Pioneers, Leonardo da Vinci". history-computer.com. Retrieved 2017-07-06...

A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. It was designed in the 1820s, and was first created...