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The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.
"A base is a natural number B whose powers (B multiplied by itself some number of times) are specially designated within a numerical system." [1]: 38 The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. [1]
Duodecimal system may refer to: duodecimal, a base-12 number system; Dewey Decimal Classification, a misspelling of the library code This page was last edited on 28 ...
The use of twelve as a base number, known as the duodecimal system (also as dozenal), originated in Mesopotamia (see also sexagesimal). Twelve dozen (12 2 = 144 ) are known as a gross ; and twelve gross (12 3 = 1,728 , the duodecimal 1,000) are called a great gross , a term most often used when shipping or buying items in bulk.
The duodecimal system (12 10 [twelve] = 10 12), which is the use of 12 as a division factor for many ancient and medieval weights and measures, including hours ...
Octal numeral system (base 8) Nonary (novenary) numeral system (base 9) Decimal (denary) numeral system (base 10) Bi-quinary coded decimal – Numeral encoding scheme; Negative base numeral system (base −10) Duodecimal (dozenal) numeral system (base 12) Hexadecimal numeral system (base 16) Vigesimal numeral system (base 20) Sexagesimal ...
A library bookshelf in Hong Kong classified using the New Classification Scheme for Chinese Libraries, an adaptation of the Dewey Classification scheme. The Dewey Decimal Classification (DDC), colloquially known as the Dewey Decimal System, is a proprietary library classification system which allows new books to be added to a library in their appropriate location based on subject.
Ancient Romans used a decimal system for integers, but switched to duodecimal for fractions, and correspondingly Latin developed a rich vocabulary for duodecimal-based fractions (see Roman numerals). A notable fictional duodecimal system was that of J. R. R. Tolkien's Elvish languages, which used duodecimal as well as decimal.