CPL was a British project to create an all-singing all-dancing programming language. The Common Programming Language was developed in the early 1960s.
And the Basic combined programming language(BCPL) was a smaller language which was good for low-level programming. Well suited for writing compilers and system code for other languages.
C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations.
C was originally developed by Dennis Ritchie between 1969 and 1973 at Bell Labs, and used to re-implement the Unix operating system.
The name of C was chosen simply as the next after B.