Source : Free On-Line Dictionary of Computing

lha
     
        1.  The {filename extension} for a file
        produced by the {shareware} {compression} and {archive}
        software {LHARC}.
     
        2.  A {compression} program for {MS-DOS}.  Output files
        have the extension ".lzh".
     
        [Does it use {LZH} compression?]
     
        (2002-07-28)