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This article mainly introduces what is the widely used computing tool before the advent of computers. It is very detailed and has a certain reference value. Friends who are interested must read it!

The computing tools that were widely used before the advent of computers were: chip (Quipu or khipu), planning (arithmetic), Antikehira device, abacus, Napier slide rule, logarithmic slide rule, and mechanical counter.

A computing tool that was widely used before the advent of computers

Chip.

Chip (Quipu or khipu) is a rope used by the Incas for knot chronicles. It is an ancient Inca method of knot recording, used to count or record history. It is made of knots of many colors.

Plan and plan

Planning, which means bamboo yard, is an ancient computing tool; it is still planning, planning, and speculating on the amount of material; it is also used as a "preparation".

Abacus

The abacus (abacus) is a form of manual calculation aids. It originated in China and has a history of more than 2600 years. It is an important invention in ancient China. Before the emergence of Arabic numerals, the abacus was a widely used computing tool in the world. Today, the abacus continues to be used in parts of Asia and the Middle East, especially in stores, which can be bought from stores that supply Chinese and Japanese goods. In the West, it is sometimes used to help children understand numbers, and some mathematicians like to experience the feeling of using an abacus to calculate simple arithmetic problems.

Antikehira device

The Antikehira device (Antikythera Mechanism) is a bell-shaped device that was found in the wreckage of an ancient ship on the Greek island of Antiketra in 1901 and sank with it for more than 2100 years. The device consists of a series of copper gears (more than 30), crank and dial that can be controlled. More than a hundred years later, scientists, with the help of modern advanced technology, finally solved its amazing mystery-this device called the Antikehira device turned out to be a super astronomical "computer" from 2000 years ago, a tool for astronomers to calculate the operation cycle of celestial bodies. Its advanced nature has been unsurpassed in the millennia since it was made.

Napier's slide rule

Napier's slide rule, also known as "Napier chip", can use addition and one-digit multiplication instead of multi-digit multiplication, or division and subtraction instead of multi-digit division, thus simplifying the calculation.

Logarithmic ruler

A logarithmic ruler is an analog computer that usually consists of three calibrated bars locked to each other and a sliding window (called a cursor). Widely used before the 1970s, it was replaced by electronic calculators and became an outdated technology.

Mechanical counter

Mechanical counter, a machine that counts mechanically, applies counting rope skipping counters and car mileage counters.

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