Graphics Interchange Format
- Original specification describing the file layout as originated by CompuServe. Also known as Gif87a.
Compression Links: GIF - Detailed information, specifications, and background of the Graphics Interchange Format.
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.
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.
Graphics Interchange Format - Provides detailed specification of file layout, encoding and decoding algorithm, and color space model for gif89a.
Unisys/CompuServe GIF Controversy - Old page from the League for Programming Freedom (LPF) on the Unisys patent controversy.
US4558302 Patent - The US patent covering the LZW compression algorithm used in GIF images.
