### SI

**(International System of Units)**
(modern metric system)

**SI** indicates the **International System of Units**,
the current well-accepted metric units.
The system offers refined definitions for a basic set of units
(meter, kilogram, second, kelvin, mole, and candela)
and a system of derived units.
The most common metric units predate the system
and are also in other similar metric-based systems.
Some other non-SI units remain in common use,
especially for Electromagnetic measurement,
such as for Magnetic Flux Density:
in addition to the SI unit, the Tesla,
a non-SI (CGS) unit, the Gauss, is still in use.

(*measurement*)
http://en.wikipedia.org/wiki/International_System_of_Units

**Referenced by:**

CGS

Gauss (G)

Julian Date (JD)

Joule

Jansky (Jy)

Magnetic Flux (B)

Magnetic Flux Density (B)

Solid Angle (Ω)

Stefan-Boltzmann Constant (σ)

Tesla (T)

Time Standard

Terrestrial Time (TT)

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