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The exact definition, giving the criteria for deciding what part of the file name is its extension, belongs to the rules of the specific file system used; usually the extension is the substring which follows the last occurrence, if any, of the dot character (example: txt is the extension of the filename readme.txt, and html the extension of ...
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.
Disks and tape drives are addressed either using a label (up to 8 characters) or a unit specification. The HP 250 file system does not use directories, nor does it use extensions to indicate file type. Instead the type is an attribute (e.g. DATA, PROG, BKUP or SYST for data files, program files, backups and the OS itself). [28]
Lists of filename extensions include: List of filename extensions (0–9) List of filename extensions (A–E) List of filename extensions (F–L) List of filename extensions (M–R) List of filename extensions (S–Z)
VFAT, a variant of FAT with an extended directory format, was introduced in Windows 95 and Windows NT 3.5. It allowed mixed-case Unicode long filenames (LFNs) in addition to classic 8.3 names by using multiple 32-byte directory entry records for long filenames (in such a way that old 8.3 system software will only recognize one as the valid directory entry).
Files created by Xara Photo & Graphic Designer (formerly Xara Xtreme and Xara Studio); early versions used the extension ART XAR: eXtensible ARchive: xar, 7-Zip: XBRL: eXtensible Business Reporting Language instance file eXtensible Business Reporting Language: XCF: Gimp image file GNU Image Manipulation Program: XDM: Directory Manipulator for ...
The ASCII character set is the most common compatible subset of character sets for English-language text files, and is generally assumed to be the default file format in many situations. It covers American English, but for the British pound sign , the euro sign , or characters used outside English, a richer character set must be used.
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...