LFN may refer to:
* La Familia Network, US Spanish TV network
*
''La Femme Nikita'' (TV series)
*
Lingua Franca Nova
Lingua Franca Nova (), abbreviated as LFN and known colloquially as Elefen, is an auxiliary constructed language originally created by C. George Boeree of Shippensburg University, Pennsylvania, and further developed by many of its users. Its voc ...
, a constructed language
*
Long fat network
In data communications, the bandwidth-delay product is the product of a data link's capacity (in bits per second) and its round-trip delay time (in seconds). The result, an amount of data measured in bits (or bytes), is equivalent to the maximu ...
, a data network with large bandwidth-delay
*
Long filename
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, a ...
, longer than 8.3 bytes in Microsoft FAT
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