International System of Units

from https://en.wikipedia.org/wiki/International_System_of_Units:

Wiki

SI Base Units
Symbol	Name	Quantity
s	second	time
m	metre	length
kg	kilogram	mass
A	ampere	electric current
K	kelvin	thermodynamic temperature
mol	mole	amount of substance
cd	candela	luminous intensity
SI Defining Constants
Symbol	Name	Exact Value
<math>\Delta\nu_\text{Cs}</math>	hyperfine transition frequency of Cs	Template:Val
Template:Math	speed of light	Template:Val
Template:Math	Planck constant	Template:Val
Template:Math	elementary charge	Template:Val
Template:Math	Boltzmann constant	Template:Val
Template:MathA	Avogadro constant	Template:Val
Template:Math	luminous efficacy of Template:Val radiation	Template:Val