The full form of four systemss of units used in measurements are
CGS system – Centimeter Gram Second system
In the CGS system, fundamental units are Centimeter, Gram and second
MKS system – Meter kilogram second system
In the MKS system, fundamental units are Meter, kilogram and second.
FPS system – Foot Pound second system
In the FPS system, fundamental units are Foot, Pound and second.
SI System – International system of Units
In SI system the fundamental units are Meter, Kilogram and Second.