International System of Units
(SI)
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Base
Units |
Seven well-defined units which
by convention are regarded as dimensionally independent. |
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Derived
Units |
Combined base units according
to the algebraic relations linking the corresponding quantities. |
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SI
Prefixes |
Prefixes used to form decimal
multiples and submultiples of SI units. |
Units Outside of SI
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Other
Units |
Units that are not part of the
International System of Units but are important and widely used. |
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Binary
Prefixes |
Prefixes for binary multiples
for use in the fields of data processing and data transmission. |
Weights & Measures
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Equivalents |
Common equivalents for units of length, area, volume and
mass. |
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Large Numbers |
Names of large numbers and some
extremely large numbers. |
Numbers
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Roman
Numerals |
A system of
numerical notations used by the Romans. It is an additive (and
subtractive) system in which letters are used to denote certain
"base" numbers, and arbitrary numbers are then denoted using
combinations of symbols. |
Base
Numbers |
Conversion table for number bases commonly used in modern electronics and
computers including binary (base 2), octal (base 8), decimal (base
10), and hexadecimal (base 16). |
Resources
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NIST Handbook 44 -
2002 Edition, Specifications, Tolerances, And Other Technical
Requirements for Weighing and Measuring Devices, as
adopted by the 86th National Conference on Weights and Measures,
(June 2001). Published by the National Institute of Standards
and Technology (NIST), a non-regulatory federal agency within
the U.S. Commerce Department's Technology Administration.
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Le Système
International d'Unités, (Seventh edition, Spring
1998, 2000). Published by the Bureau International des Poids et
Mesures ( BIPM), set up by the Convention of the Metre and has
its headquarters near Paris, France. It is financed jointly by the
Member States of the Convention and operates under the exclusive
supervision of the Comité International des Poids et Mesures.
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IEC International
Standard IEC 60027-2: Letter symbols to be used in electrical
technology - Part 2: Telecommunications and electronics,
(Second edition, November 2000). Published by the International
Electrotechnical Commission (IEC), the leading international
organization for worldwide standardization in electrotechnology.
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