Q:
# What are some early counting devices?

**Two early counting devices were the abacus and the Antikythera mechanism.** The abacus and similar counting devices were in use across many nations and cultures. The Antikythera mechanism hails from the Greek island of Antikythera.

Credit:
Shin99½
Moment
Getty Images

Early evidence of abaci dates to 200 B.C. in China. The classic abacus consists of a number of rows of sliding beads on a frame with a horizontal beam dividing the frame into two unequal halves. The number of rows vary, but there are typically five beads below the beam and two above. An abacus is capable of performing addition, subtraction, multiplication, division, cube root and square root, and it is a much faster method of mathematics than writing calculations by hand. In fact, some parts of rural China still employ abaci in businesses, as electricity frequently fails and renders modern counting devices useless.

Over a century ago an unusual mechanism was found off the coast of the Greek island of Antikythera. It was thought to perhaps be an astrolabe or atomic clock, but its true use was unknown. It was called the Antikythera mechanism, and it has been extensively studied ever since. World class technology industries, such as Hewlett Packard, have worked on the mechanism. It is now understood to track various cycles of the solar system, and it operates as a sort of mechanical computer. The Antikythera mechanism is still under investigation and is considered to be the most complex piece of machinery from the ancient world.

Learn more about Math Calculators-
Q:
## How much would a 15 dollar shirt cost if it was 20 percent off?

A: A $15 shirt would cost $12 if it were 20 percent off. The 20 percent discount would come to $3, and subtracting $3 from $15 gives $12.... Full Answer >Filed Under: -
Q:
## How do you convert 47 kg to pounds?

A: Conversion from 47 kilograms to an unknown number of pounds can be done using a calculator or chart. It can also be estimated mentally at a rate of a littl... Full Answer >Filed Under: -
Q:
## What are some online math calculators?

A: Some popular online math calculators are MathWay.com, WolphramAlpha.com and Calculator.net. Each of these include tools to help you solve problems in basic... Full Answer >Filed Under: -
Q:
## What is a number combination calculator?

A: A number combination calculator determines the number of possible combinations of a smaller set of numbers from a larger set of numbers. Most graphing calc... Full Answer >Filed Under: