  |
Graphics Interchange Format - http://www.w3.org/Graphics/GIF/spec-gif87.txt
Original specification describing the file layout as originated by CompuServe. Also known as Gif87a. |
| |
US4558302 Patent - http://www.delphion.com/details?pn=US04558302__
The now expired US patent that covered the LZW compression algorithm used in GIF images. |
| |
The GIF Controversy - http://www.cloanto.com/users/mcb/19950127giflzw.html
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 - http://catb.org/~esr/gif2png/
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 - http://256.com/gray/docs/gifspecs/
Provides detailed specification of file layout, encoding and decoding algorithm, and color space model for gif89a. |