Question

In operating systems, the primary interface between the user and the rest of the system is its COMMAND INTERPRETOR.

Answer 1

In operating systems the primary interface is command Interpreter. In a language it can handle the users with messages and command lines process. On which the user will helps the manager to process.

They can allow the new programmers on the system to be standard with part like Apply, MS DOS.

It is just privileged course for the operating system.