LZ

LZ can stand for:
* The IATA code for Balkan Bulgarian Airlines
* Landing Zone, an avionic or military term
* Led Zeppelin, a rock music group
* Lempel-Ziv, prefix for family of data compression algorithms (LZ77, LZ78, LZW), sometimes used as beginning for file name extensions (LZH)
* Luftschiff ("Airship") Zeppelin (German), prefix of the serial numbers of the historic airships built by Ferdinand Graf Zeppelin in Friedrichshafen and elsewhere
* Lubrizol, NYSE symbol of The Lubrizol Corporation