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abacus

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abacus

abacus   Reference library

Encyclopedia of Semiotics

Reference type:
Subject Reference
Current Version:
2007
Subject:
Language reference, Linguistics
Length:
452 words

A mechanical device for making arithmetic calculations, the abacus is a precursor to, and a very primitive form of a

abacus

abacus   Quick reference

The Oxford Dictionary of Phrase and Fable (2 ed.)

Reference type:
Subject Reference
Current Version:
2006
an oblong frame with rows of wires or grooves along which beads are slid, used for calculating; possibly a development of the classical counting board, it was widely used in Europe in the ... More
abacus

abacus   Reference library

The Oxford Companion to the Mind (2 ed.)

Reference type:
Subject Reference
Current Version:
2006
Subject:
Science and technology, Psychology, Philosophy
Length:
230 words

Ancient calculating instrument in which numbers and operations (especially adding) are represented by the numbers and positions of pebbles or

abacus

abacus   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
31 words

Mathematical tool used since ancient times in the Middle and Far East for addition, subtraction, multiplication, and division. One form

abacus

abacus   Reference library

William David Ross and Michael Vickers

The Oxford Classical Dictionary (4 ed.)

Reference type:
Subject Reference
Current Version:
2012
Subject:
Classical studies, History
Length:
102 words
a counting-board, the usual aid to reckoning in antiquity. The Egyptians, Greeks, and Romans alike used a board with vertical columns, on which (working from right to left) units, tens, ... More
abacus

abacus   Reference library

The Oxford Dictionary of the Renaissance

Reference type:
Subject Reference
Current Version:
2005
Subject:
History, Early Modern History (1500 to 1700)
Length:
144 words
The abacus uses counters to carry out operations in arithmetic. In the Renaissance the instrument usually took the form of a board with lines to mark the positions for counters. More ... More
abacus schools

abacus schools  

From the late thirteenth century onwards, many towns and guilds paid an ‘abacus master’ to teach mathematics to a given number of boys who intended to engage in commerce or ...
algorithm

algorithm  

A documented series of steps which leads to the transformation of some data. For example, in order to calculate the sum of a series of numbers a possible algorithm would involve repeatedly adding the ...
calculate

calculate  

To work out the value of a mathematical or arithmetical procedure, or the output of an algorithm.
calculating geniuses

calculating geniuses  

The term ‘calculating genius’ describes anyone strikingly more able than normal to do numerical calculations mentally. Since the term is relative to what is regarded as normal, it is applied ...
calculator

calculator  

Reference type:
Overview Page
A device for performing arithmetical calculations or algebraic manipulations. The earliest example is the abacus. Hand-held electronic calculators now have the computational powers of the early ...
computer

computer  

Any device capable of carrying out a sequence of operations in a defined manner. The definition of the operations is called the program. An analog computer performs computations by manipulating ...
number representation

number representation  

Reference type:
Overview Page
Subject:
Linguistics
Probably no system of number representation can quite function without some arbitrary elementary signs. Western words, for numbers under ten and Indo‐Arabic numerals do not show either how the ...

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