Command line interfaces appear to be a "shorthand" version of Graphical user interfaces which is why they are called "Command line Interfaces" instead.
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Comparison to graphical user interfaces
A command-line system may require paper or on-line manuals for the user's reference, although often a "help" option provides a concise review of the options of a command. The command line environment may not provide the graphical enhancements such as different fonts or extended edit windows found in a GUI. It may be difficult for a new user to become familiar with all the commands and options available, compared with the drop-down menus of a graphical user interface, without repeated reference to manuals.