Long filename (LFN) support is Microsoft's backward compatible extension of the 8.3 filename (short filename) naming scheme used in MS-DOS. Long filenames can be more descriptive, including longer filename extensions common on other operating systems such as <a href="/mediawiki/index.php?title=.jpeg" class="mw-redirect" title=".jpeg">.jpeg</a>, <a href="/mediawiki/index.php?title=.tiff" class="mw-redirect" title=".tiff">.tiff</a>, <a href="/mediawiki/index.php?title=.html" class="mw-redirect" title=".html">.html</a>, and <a href="/mediawiki/index.php?title=.xhtml" class="mw-redirect" title=".xhtml">.xhtml</a> rather than specialized shortened names such as .jpg, .tif, .htm, or .xht. The standard has been common with File Allocation Table (FAT) filesystems since its first implementation in