Contains updates to articles and other content in the Encarta encyclopedia; helps keep Encarta information up-to-date without upgrading the entire program; located in the "\Program Files\Microsoft Reference\Encarta Encyclopedia\UpdateXX\" directory.

Electronic book that can be read on a desktop computer using YanCEyDesktop; can also be read on a Pocket PC PDA using YanCEyWare Reader; supports text, graphics, highlighting, links across e-books, and page viewing history; common format used for storing The Church of Latter-day Saints literature and other religious texts, though it can be used for other nonfiction and fictional texts as well.

YBK files must be stored in the \Library\ directory of the SD card used by the PDA in order to work correctly.

YanCEyWare Reader for Pocket PC and Windows Mobile is distributed as donation-ware from the YanCEyWare website.