.YBK File Extension
File Type 1Microsoft Encarta Yearbook File
What is a YBK file?
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.
File Type 2YanCEyWare eBook
.YBK File Association 2
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 were distributed as donation-ware from the YanCEyWare website. However, the software is no longer available or maintained.