LZH extension is used for compressed archive files. LZH data is compressed using LZW compresion algorithm and Huffmana coding. LZH is short for Lempel-Ziv and Haruyasu, inventors of compression algorithm named after them. LHA format was developed originally for Amiga computers, but gradually became available on many other platforms. The format is very popular in Japan. LZH files are supported by many file manager tools.