The International System of Units (SI) is the modern metric system used for measuring physical quantities. It is based on seven fundamental quantities, which serve as the foundation for all other measurable quantities. These fundamental SI quantities, along with their SI symbols and units, are as follows:

1. Length (L):

   • Symbol: �L
   • Unit: Meter (m)

2. Mass (M):

   • Symbol: �M
   • Unit: Kilogram (kg)

3. Time (T):

   • Symbol: �T
   • Unit: Second (s)

4. Electric Current (I):

   • Symbol: �I
   • Unit: Ampere (A)

5. Temperature (Θ):

   • Symbol: ΘΘ (theta)
   • Unit: Kelvin (K)

6. Amount of Substance (N):

   • Symbol: �N
   • Unit: Mole (mol)

7. Luminous Intensity (J):

   • Symbol: �J
   • Unit: Candela (cd)