Long filename
Extension of the 8.3 file naming scheme / From Wikipedia, the free encyclopedia
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Long filename (LFN) support is Microsoft's backward-compatible extension of the 8.3 filename (short filename) naming scheme used in DOS. Long filenames can be more descriptive, including longer filename extensions such as .jpeg
, .tiff
, .html
, and .xhtml
that are common on other operating systems, 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 Windows NT 3.5 of 1994.
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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.