Write a note about The International System of Units $(SI)$.

(N/A) The International System of Units (in French,$Le \text{ } Systeme \text{ } International \text{ } d' \text{ } Unites$) was established by the $11^{th}$ General Conference on Weights and Measures ($CGPM$ from $Conference \text{ } Generale \text{ } des \text{ } Poids \text{ } et \text{ } Mesures$).
The $CGPM$ is an intergovernmental treaty organization created by a diplomatic treaty known as the Metre Convention,which was signed in Paris in $1875$.
The $SI$ system has seven base units,which are listed in the table below. These units pertain to the seven fundamental scientific quantities. Other physical quantities,such as speed,volume,and density,can be derived from these base quantities. The $SI$ system allows the use of prefixes to indicate the multiples or submultiples of a unit.

Base Physical Quantity ($SI$ Symbol)	Name of Unit ($SI$ Unit Symbol)
Length $(l)$	metre $(m)$
Mass $(m)$	kilogram $(kg)$
Time $(t)$	second $(s)$
Electric current $(I)$	ampere $(A)$
Thermodynamic temperature $(T)$	kelvin $(K)$
Amount of substance $(n)$	mole $(mol)$
Luminous intensity $(I_{v})$	candela $(cd)$