A named collection of data stored on a computer disk is called a file. Files are settings, commands or information that are used by a computer program to perform a certain function.
As of February 2015, there are many millions of kinds of files in use, and they are commonly identified by either the data that is found in the file or by the type of file. When using Windows operating systems, files are typically represented by different icons. The appearance of the icon is determined by what kind of file it is. Usually, files can be moved to different places on a disk.