| http://www.w3.org/ns/prov#value | - In a GUI, a pointing device such as a mouse or a light pen can be used for issuing commands.The use of a pointing device increases the efficacy issue procedureWhereas a Text based interface can be implemented even on a cheap alphanumeric display terminal.Types of user interfacesUser interfaces can be classified into the following three categories:??? Command language based interfaces??? Menu-based
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