Less commonly, it's also called a CLI, command language interpreter, console user interface, command processor, shell, command line shell, or a command interpreter. Frequently Asked Questions.

Unix was developed as a command line interface in the early 1970s with a very rich command vocabulary. DOS followed more than a decade later for the IBM PC, and DOS commands migrated to Windows.

Simply put, there is no user interface. There are no menus. AutoHotkey parses script files that you create using an internal command language and save with any text editor.