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In 1977 and 1978, two Israeli researchers, Jacob Ziv and Abraham Lempel worked on a set of compression algorithms, which were later named LZ77 and LZ78. Later, in 1983, Terry Welch from Sperry (which later merged with Burroughs to form Unisys) developed a very fast variant of LZ78 called LZW. Welch, together with two IBM researchers, Victor Miller and Mark Wegman, filled for a patent for LZW. At the same time, Compuserve, specifically Bob Berry, was designing a new algorithm for a compressed image format, where they used the LZW

This page is an attempt to provide an easily digested PNG status board--basically a place to come and see how PNG currently fares for those who haven't been keeping up with the news page or mailing lists. It grew out of an article submitted to Slashdot in February 1999 (with a followup in June 2000), but it is intended to be more dynamic and has been redesigned accordingly. Stability: excellent * * * * * The PNG specification has proven to be exceptionally solid. There have been two minor updates since the 1.0 release--to clarify gamma handling and to