Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
|Publication Date:||25 March 2004|
This standard covers letter symbols 1 for units of measurement. It does not include abbreviations for technical terms, nor does it cover symbols for physical quantities. 2
The symbols given in this standard are intended for all applications, including use in text and equations; in graphs and diagrams; and on panels, labels, and nameplates. Provision is made for modifications to be used when only character sets of limited capability are available.
2 As used in this standard, the term physical quantity means a measurable attribute of phenomena or matter. Examples are length, mass, and time.