LZ

LZ usually refers to some form of Lempel-Ziv compression. It is an overused letter sequence in data compression format names.

For Lempel-Ziv compression in general, see LZ77 and LZ78.

For specific formats, see Compression.

Other things LZ could mean:
 * Lzip (.lz)
 * LZ - An optimized LHA utility for Amiga, by Xenomiga Technology