Who uses command line interface today?

The command line interface is a throw back to before the Windows GUI was invented and everyone used MS-DOS (late seventies early eighties). You may input MS-DOS commands at the command line interface. For example, click on Start>Run>cmd, this will pull up a black screen at the c:> drive. Type in DIR and it will show you all the Directories. To get out of command line type EXIT. The command line is used when the system has problems and you cannot get to Windows. Then you can copy, delete, or start programs at the command line. If you would like to learn the history and competition between MAC and Microsoft and also learn how Windows came to be, rent the movie "The Pirates of Silicon Valley", its great or visit WOZ.ORG, Steve Woznicaks web site, he invented the personal computer and still answers email. Hope this helps.

Steve Wosniack did not invent the personal computer. TRS80, Commodore, not to mention the altair, the sinclair, Victor and others. Steve did not even invent the GUI or the mouse - this was done by Xerox Palo Alto.. yes that is right Xerox made things easy to use but failed to market it, the same people who gave you ethernet - what you are hooked up to the net with.

Command line functions are many times used for higher level functions and allow people to get to the back end of a program. Sometimes they are there until the GUI can be made for them. Sometimes they are used to allow programmers to do tricks that should not be put into the gui - it keeps the average yo from doing something they should not.