 In 1964, MIT Computation Center staff member Louis Pouzin developed the RUNCOM tool for executing command scripts while allowing argument substitution.Pouzin coined the term "shell" to describe the technique of using commands like a programming language, and wrote a paper describing how to implement the idea in the Multics operating system.Pouzin returned to his native France in 1965, and Schroeder developed the first Multics shell with the assistance of an unnamed man from General Electric.