Long filename

<p>Long filename (LFN) support is <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a>'s backward-compatible extension of the <a href="/facts/8.3_filename/P61yKaHS">8.3 filename</a> (short filename) naming scheme used in <a href="/facts/MS-DOS/fVrrz1uN">MS-DOS</a>. Long filenames can be more descriptive, including longer <a href="/facts/Filename_extension/cJgfAym4">filename extensions</a> such as <a href="/facts/.jpeg/HQ8QS3uB">.jpeg</a>, <a href="/facts/.tiff/TjBJcLeT">.tiff</a>, and <a href="/facts/.html/sSc3fT78">.html</a> that are common on other operating systems, rather than specialized shortened names such as .jpg, .tif, or .htm. The standard has been common with <a href="/facts/File_Allocation_Table/uFvpmWxa">File Allocation Table</a> (FAT) <a href="/facts/Filesystem/FdPm90uc">filesystems</a> since its first implementation in <a href="/facts/Windows_NT_3.5/QJq52ukC">Windows NT 3.5</a> of 1994.
</p><p>To maintain compatibility with older operating systems, Microsoft formulated a method of generating an 8.3 filename from the long filename (for example, Microsoft.txt to MICROS~1.TXT) and associating it with the file.
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Long filename open-in-new

Long filename