### 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)

index