Graphics Interchange Format
- Original specification describing the file layout as originated by CompuServe. Also known as Gif87a.
- http://www.w3.org/Graphics/GIF/spec-gif87.txt
Compression Links: GIF - Detailed information, specifications, and background of the Graphics Interchange Format. - http://www.compression-links.info/GIF
Graphics Interchange Format - Provides detailed specification of file layout, encoding and decoding algorithm, and color space model for gif89a. - http://256.com/gray/docs/gifspecs/
The gif2png Home Page - Page prepared in 2003 about a program that converts files from GIF to PNG. The conversion preserves all graphic information, including transparency. - http://catb.org/~esr/gif2png/
The GIF Controversy - A 2004 article on the GIF controversy seen from a software developer's perspective. Includes original interviews, a historical perspective, and a detailed bibliography. - http://cloanto.com/users/mcb/19950127giflzw.html
Unisys/CompuServe GIF Controversy - Old page from the League for Programming Freedom (LPF) on the Unisys patent controversy. - http://lpf.ai.mit.edu/Patents/Gif/Gif.html
US4558302 Patent - The US patent covering the LZW compression algorithm used in GIF images. - http://www.delphion.com/details?pn=US04558302__