ISO 80000-1:2009
Quantities and units — Part 1: General
ISO 80000-1:2009 gives general information and definitions concerning quantities, systems of quantities, units, quantity and unit symbols, and coherent unit systems, especially the International System of Quantities, ISQ, and the International System of Units, SI.
The principles laid down in ISO 80000-1:2009 are intended for general use within the various fields of science and technology and as an introduction to other parts of the Quantities and units series.
Ordinal quantities and nominal properties are outside the scope of ISO 80000-1:2009.
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Quantities
Units
Realizing the values of units
Arrangement of the tables
Scope
Normative references
Terms and definitions
Quantities
The concept of quantity
Kind of quantity ─ Quantity calculus
System of quantities ─ Base quantities and derived quantitie
Universal constants and empirical constants
Constant multipliers in quantity equations
International System of Quantities, ISQ
Dimensions
Units
Units and numerical values
Mathematical operations
Quantity equations and numerical value equations
Coherent systems of units
The International System of Units, SI
General
SI base units
SI derived units
SI prefixes
The unit one
Other units
Printing rules
Symbols for quantities
General
Subscripts
Combination of symbols for quantities
Expressions for quantities
Names and symbols for units
General
Combination of symbols for units
Prefixes
English names of compound units
Spelling of names of quantities and of units in the English
Numbers
General
Decimal sign
Multiplication and division
Error and uncertainty
Chemical elements and nuclides
Greek alphabet
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Quantities
Units
Realizing the values of units
Arrangement of the tables
Scope
Normative references
Terms and definitions
Quantities
The concept of quantity
Kind of quantity ─ Quantity calculus
System of quantities ─ Base quantities and derived quantitie
Universal constants and empirical constants
Constant multipliers in quantity equations
International System of Quantities, ISQ
Dimensions
Units
Units and numerical values
Mathematical operations
Quantity equations and numerical value equations
Coherent systems of units
The International System of Units, SI
General
SI base units
SI derived units
SI prefixes
The unit one
Other units
Printing rules
Symbols for quantities
General
Subscripts
Combination of symbols for quantities
Expressions for quantities
Names and symbols for units
General
Combination of symbols for units
Prefixes
English names of compound units
Spelling of names of quantities and of units in the English
Numbers
General
Decimal sign
Multiplication and division
Error and uncertainty
Chemical elements and nuclides
Greek alphabet