|HTTP Content Coding Token||gzip||deflate||compress|
|An encoding format produced by the file compression program "gzip" (GNU zip)||The "zlib" format as described in RFC 1950.||The encoding format produced by the common UNIX file compression program "compress".|
|Data Format||GZIP file format||ZLIB Compressed Data Format||The compress program's file format|
|Compression Method||Deflate compression method||LZW|
|Deflate consists of LZ77 and Huffman coding|
Compress doesn't seem to be supported by popular current browsers, possibly due to its past with patents.
Deflate isn't done correctly all the time. Some servers would send the deflate data format instead of the zlib data format and at least some versions of Internet Explorer expect deflate data format instead of zlib data format.