LZW by , etc. Jacob Welch and Terry Zeev been devised. This algorithm is a compression algorithm, which in 1984 has been released. The algorithm of the speed of a fairly large enjoys, but the analysis of little data can do.

method of data compression that often in the documents is used in a method based on dictionary based that on the basis of a dictionary, and encoder works. This dictionary with 4k array, encoder and is common, and both it to-day. S, 0 to 255 of the codes, the ski is composed, but the rest of the contextual data over time will be completed. The algorithm is very fast and . This by, its author, called Lempel–Zois–Welch proposed.