.djvu

Compressed image format developed by AT&T and marketed by LizardTech; designed to allow content developers to scan high-resolution color pages of books, magazines, comics, catalogs, etc. and publish them on the Web.

DjVu compression can compress color documents 5 to 10 times more than .JPEG or .GIF compression, and 3 to 8 times more than .TIFF compression for black and white documents.

Important: DjVu is pronounced "deja vu."