Phd means doctor in philosophy.
The special thing about PhD is that you can get a degree by studying in any subject.
After getting the degree, you become eligible for speech at the university level.
Considered to be the best university in America.
Harvard university, stanford university, california institute of technology, MIT.
All these universities come in the top 5 all over the world.
Here in the US you have to pay U $ 28k 0 U $ 55k for a phd.