CGS System (Centimeter-Gram-Second System):
- Used in scientific measurements.
- Length in centimeters (cm), mass in grams (g), time in seconds (s).
SI System (International System of Units):
- Globally accepted system of measurement.
- Length in meters (m), mass in kilograms (kg), time in seconds (s), and includes electric current (A), temperature (K), luminous intensity (cd), and mole (mol).