DjVu (pronounced “déjà vu”) is a digital document format with advanced compression technology and high performance value. DjVu allows for the distribution on the Internet and on DVD of very high resolution images of scanned documents, digital documents, and photographs. DjVu viewers are available for the web browser, the desktop, and PDA devices.
There are few SAP books available on net which are scanned into the DjVu format. To read the books, DjViewer is required.