+LZW (Lempel–Ziv–Welch) is a universal [data compression](/wiki/data-compression) [algorithm](/wiki/algorithm) that finds repetitive patterns within data. It builds a dictionary of frequently occurring sequences, replacing them with shorter codes to reduce file size. This method is notably employed in the GIF image format.
+## See also
+- [Lossless Compression](/wiki/lossless-compression)
+- [GIF](/wiki/gif)
+- [LZ77](/wiki/lz77)
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