The cursor allows you to insert text where you wish, or to select existing items to be deleted, copied, or modified. For example, an academic department might have a file server containing student records and course information, to which individual computers in other parts of the same building could connect to access this information. File servers are often part of a network. The disk is protected by a shell or cover of some kind. Instead of entering commands on the keyboard, the user manipulates icons and windows , usually with a mouse .
Hard drives are much more expensive than floppies and can hold a great deal more information.
By manipulating the icons, you get desired results from the hardware and software they represent. Any information you put into the computer, through typing, copying files, or whatever. Once connected, computers on a network can share files, send large amounts of information very quickly, and enable multiple users to communicate at one time. Windows, Macintosh, NeXT and UNIX are common platforms. The amount of RAM in your computer is fixed, although it can often be increased, and it is one of the two kinds of memory that dealers will use to describe a computer's capabilities.