The full forms of CGS, FPS, MKS, and SI are Centimeter-Gram-Second, Foot-Pound-Second, Meter-Kilogram-Second, and International System of Units, respectively.
Each system represents a set of units for measuring physical quantities:
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CGS (Centimeter-Gram-Second) System:
- Centimeter: Unit of length
- Gram: Unit of mass
- Second: Unit of time
- This system is mainly used in the field of physics.
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FPS (Foot-Pound-Second) System:
- Foot: Unit of length
- Pound: Unit of force (and sometimes mass)
- Second: Unit of time
- Commonly used in the United States for non-scientific applications.
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MKS (Meter-Kilogram-Second) System:
- Meter: Unit of length
- Kilogram: Unit of mass
- Second: Unit of time
- This system was a precursor to the SI system and is still used in some contexts.
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SI (International System of Units):
- A modern form of the metric system. It includes the meter, kilogram, second, ampere, kelvin, candela, and mole.
- It is the most widely used measurement system in the world, both in everyday commerce and in science.