Swit Char
A command-line interface (CLI) is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines).
The CLI was the primary means of interaction with most popular operating systems in the 1970's and 1980's, including MS-DOS, CP/M, Unix, and Apple DOS. The interface is usually implemented with a command line shell, which is a program that accepts commands as text input and converts commands to appropriate operating system functions.
Command-line interfaces to computer operating systems are less widely used by casual computer users, who favor graphical user interfaces. Command-line interfaces are often preferred by more advanced computer users, as they often provide a more concise and powerful means to control a program or operating system.
Programs with command-line interfaces are generally easier to automate via scripting.
Alternatives to the command line include, but are not limited to menus (see IBM AIX SMIT for example), keyboard shortcuts, and various other desktop metaphors centered on the pointer (usually controlled with a mouse).
Read more about Swit Char: Operating System Command-line Interfaces, Application Command-line Interfaces, History, Usage, Anatomy of A Shell CLI, Command-line Interpreter, Scripting, Other Command-line Interfaces, Quotes