Graphics

"lossy":

JPG http://www.faqs.org/faqs/jpeg-faq/part1/

"lossless":

PNG - Portable Network Graphics http://www.libpng.org/pub/png/slashpng-1999.html
http://xml.coverpages.org/ni2003-11-26-a.html


GIF - Unisys and Compuserve

TIFF

BMP