Do Muslims have a system of castes?

This should be considered that Islam is a system or idealody based on social and financial justice and prohabits any discrimination of someone on the basis of his caste,color,financial status, or any other aspect as the Prophet Muhammad Said in his last address to the fellow Muslims that 'the white have no perference over the black and vice-versa and an Arab have no perference over the non-Arab and vice-versa.

but if someone asks about Caste System in Muslim society than it is not out of question,as in almost all mulim societies people roughly defferentiates themselves on the basis of their parentage,language,locality and believes but all in all their is no clear and authorized caste system in Muslim society.