Program files Operating systems , such as DOS and Windows , consist of organized groups of files. Application software , such as Word and GradeQuick , also consist of organized groups of files. Computer Disk Drives All computer files are stored on disks.
Every computer has at least one way of accessing files from a disk drive.
These drives reside on the network's file server and not on your workstation. In order for the computer to distinguish files from each other, every file needs to have a unique filename. Program files are already named and organized by the computer system itself. Because of the differences in file data types a GradeQuick file cannot be read by Excel , or a Word file cannot be read by WordPerfect, etc. The MS-DOS operating system and Windows 3x have some restrictions on the filenames that they can recognize.