DjVu
<application, compression, file format, graphics, World-Wide Web> (pronounced like "deja vu") An image compression algorithm and software developped by Yann LeCun's research group at AT&T Labs, which provides high resolution digital images for distribution over the Internet. DjVu is five to 20 times more efficient than JPEG or GIF. A free web browser plug-in allows users to display DjVu images.