LZ may refer to:
Computing .lz, a filename extension for an lzip archive Abraham Lempel (born 1936) and Jacob Ziv (born 1931), Israeli computer scientists: Lempel-Ziv, prefix for family of data compression algorithms, sometimes used as beginning for file name extensions Lempel–Ziv–Markov chain algorithm
Aviation Republic of Bulgaria (aviation code) Air Link IATA code Balkan Bulgarian Airlines IATA code (1947-2002) Swiss Global Air Lines IATA code (2005-2018) Landing zone, an area where aircraft can land LZ-, prefix of the serial numbers of Zeppelin airships built by Ferdinand von Zeppelin
Other uses LUX-ZEPLIN, a dark matter detection experiment Lubrizol, a chemical manufacturer (NYSE symbol LZ) Lutz jump, a figure skating jump
See also Landing zone (disambiguation) ZL (disambiguation) IZ (disambiguation) 1Z (disambiguation)