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A filename or file name is a name used to uniquely identify a computer file in a file system. Different file systems impose different restrictions on filename lengths ...
The FAT file system for DOS and Windows stores file names as an 8-character name and a three-character extension. The period character is not stored. The High Performance File System (HPFS), used in Microsoft and IBM's OS/2 stores the file name as a single string, with the "." character as just another character in the file name.
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While MS-DOS and NT always treat the suffix after the last period in a file's name as its extension, in UNIX-like systems, the final period does not necessarily mean that the text after the last period is the file's extension. [1] Some file formats, such as .txt or .text, may be listed multiple times.
The folder and file names are separated by slashes in this example; the topmost or root folder has no name, and so the path begins with a slash (if the root folder had a name, it would precede this first slash). Many computer systems use extensions in file names to help identify what they contain, also known as the file type. On Windows ...
The number distinguishes it from other files with both the same first six letters and the same extension. Dots are important and must be used even for folder names (if there is a dot in the folder name). If there are multiple dots in the long file/directory name, only the last one is used. The preceding dots should be ignored.
It is somewhat equivalent on the Internet to a URL specifying the full name of the computer and the entire name of a particular document as a file. The alternative is an unqualified file name or a partially qualified file name. On Unix-style systems, DOS, and Microsoft Windows, the name "sample" refers to a file in the current directory named ...
A filename is a string used to uniquely identify a file stored on this structure. Before the advent of 32-bit operating systems, file names were typically limited to short names (6 to 14 characters in size).