I want to learn unix?

In the 1960s, Thompson and Dennis Ritchie worked on the Multics operating system. While writing Multics, Thompson created the Bon programming language. The two left the Multics project as it was becoming too complex, but they took the lessons they learned to Bell Labs, where, in 1969, Thompson and Ritchie were the principal creators of the UNIX operating system. There, Thompson also wrote the B programming language, a precursor to Ritchie's C.